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When your Scion xD starts showing slipping, rough shifts, or fluid leaks, choosing the right transmission rebuild kit matters for long-term reliability and drivability. A correct kit supplies the seals, gaskets, and replacement components you need to rebuild the transmission to factory tolerances and address common failure points. This guide shortlists the top options for Scion xD transmission rebuild kit buyers and explains the evaluation criteria—component completeness, fitment accuracy, and material quality—so you can pick a kit that matches your repair plan. Read on for our selected top picks and practical buying considerations.
Looking for other parts? See all Scion xD parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | Crmawiny U340/U341 Transmission Rebuild Kit (4‑Speed) |  |
| Best Quality Built to a higher standard if you want something more solid | DORVAK U340/U341 Transmission Rebuild Kit for Scion xA/xB/xD and select Toyota/Pontiac models | |
| Best Value The sweet spot between price and what you get | Solarhome Transmission Gasket and Seal Kit for U340/U341 4-Speed (select Scion/Toyota/Pontiac) |  |
| Best Budget The cheapest option that still gets the job done reliably | ZIKAUTOX Transmission Rebuild Kit for U340/U341 4-Speed (fits Scion xA/xB/xD and select Toyota/Pontiac models) | |
| Highest Rated A top-rated pick with lots of positive feedback | Solarhome Transmission Rebuild Kit for Scion xB / Pontiac Vibe and Toyota Models |  |
| Most Popular A crowd favorite that many people choose with confidence | U340/U341 Transmission Rebuild Kit for Scion xA/xB/xD |  |
| Best Seller A high-volume bestseller chosen again and again | QUXTOR Transmission Rebuild Kit for Scion xD (U340/U341 4-Speed) | |
1. Crmawiny U340/U341 Transmission Rebuild Kit (4‑Speed)
| Part Name | U340 Transmission Rebuild Kit |
|---|---|
| Applicable Transmissions | U340 U340E U341 U341E U341F 4 speed automatic |
| Included Items | Overhaul gasket and seal kit; friction plates; steel plates |
This Crmawiny transmission rebuild kit is a full overhaul package for U340/U341 4‑speed automatics, supplying an overhaul gasket and seal kit plus friction and steel plates needed to rebuild the unit. It is intended for drivetrain repairs on compatible Scion xA, xB, and xD models and several Toyota/Pontiac vehicles, and is typically used during a teardown when worn clutches, steels, and seals are replaced to restore shift quality and prevent leaks. The kit’s inclusion of both friction and steel plate sets simplifies sourcing and speeds a shop or experienced DIY job. Practical benefits include having matched friction and steel plate sets that reduce compatibility checks and a comprehensive gasket/seal set to address common leak points. Limitations are that the listing does not provide detailed fitment by transmission subcode or confirm OEM equivalence, so buyers should verify the part number against the transmission and compare old parts before installation. Installation still requires transmission disassembly skills and proper measurement clearances to ensure long service life.
Best for: Balanced owners who want a single, comprehensive kit to restore shift feel and stop leaks on a Scion xD (U340/U341) and prefer buying a matched set to simplify a rebuild.
Less Ideal for: Casual drivers without transmission disassembly experience or anyone seeking a direct factory‑branded replacement without confirming part cross‑references.
- Complete overhaul contents including gasket/seal kit plus friction and steel plates
- Packaged specifically for U340/U341 4‑speed automatic families used in Scion and Toyota models
- Simplifies parts sourcing for a full rebuild job
- Fitment details and OEM cross‑references are limited in the listing so verification is required before purchase
- Not a plug‑and‑play item; requires full transmission disassembly and technical know‑how
Verdict: A single, full-content rebuild kit that covers gaskets, seals, friction plates, and steels to streamline a U340/U341 transmission overhaul on Scion xD vehicles.
2. DORVAK U340/U341 Transmission Rebuild Kit for Scion xA/xB/xD and select Toyota/Pontiac models
| Manufacturer | DORVAK |
|---|---|
| Model | 1213759435 |
| Part Number | U340 U340E U341 U341E U341F |
This DORVAK rebuild kit supplies the core internal parts needed to overhaul a U340/U341 4-speed automatic transmission commonly found in Scion xA, xB and xD models and several Toyota and Pontiac vehicles. It combines an overhaul gasket and seal kit with friction plates and steel plates so you can replace worn clutch packs and restore sealing surfaces during a rebuild. In practice the kit is used during a full teardown and rebuild, helping correct slipping, rough shifts, and leaks when worn friction material or seals are the cause. The inclusion of both friction and steel plates means you can refresh clutch stack components without sourcing multiple separate items. Expect a straightforward fit when matched to the listed applications, but be sure to verify the part number against your transmission case and valve body before assembly. This is a parts-level solution for experienced DIY mechanics or shops rather than a plug-and-play module, and it does not include labor, gaskets for external components, or valve body reconditioning services.
Best for: Performance-oriented owners and independent mechanics who want a high-quality parts kit to restore shifting and clutch performance during a thorough rebuild.
Less Ideal for: Drivers seeking a turnkey remanufactured transmission or users without access to workshop tools and transmission rebuilding experience should consider professional rebuild services instead.
- Complete internal kit that includes gasket and seal kit plus friction and steel plates
- Specifically references U340/U341 4-speed transmissions used in Scion xA/xB/xD applications
- Useful for restoring clutch pack function and addressing internal leaks without buying multiple parts
- Does not include external components or valve body reconditioning needed for some rebuilds
- Requires mechanical skill and a full teardown to install properly
Verdict: A targeted parts kit that supplies the internal clutch plates and seals needed to perform a quality U340/U341 transmission rebuild on compatible Scion xD family vehicles.
3. Solarhome Transmission Gasket and Seal Kit for U340/U341 4-Speed (select Scion/Toyota/Pontiac)
| Brand Name | Solarhome |
|---|---|
| Part Number | BL00351 |
| Applicable Models | Scion xD/xA/xB, Toyota Matrix/Corolla/Celica, Pontiac Vibe |
| Transmission Family | U340, U340E, U341, U341E 4-speed |
This Solarhome gasket and seal kit supplies the common seals and gaskets needed when rebuilding or servicing U340/U340E/U341/U341E 4-speed automatic transmissions used in several Scion and Toyota cars and the Pontiac Vibe. Typical use is during a clutch pack or seal replacement service where leaking or worn seals are the root cause of fluid loss or slipping. The kit lists compatibility with specific models such as Scion xD, xA, xB and Toyota Matrix and Corolla families, which helps confirm fitment before purchase. Practical benefits include a single-purchase solution that groups multiple gaskets and seals required for a mid-level transmission job and eases parts sourcing when you are rebuilding on a budget. Limitations are that the listing does not show a parts breakdown or materials, so technicians should verify each piece against the vehicle's service manual and the VIN to ensure the kit contains every specific ring or gasket needed for a complete rebuild rather than a partial service.
Best for: Practical optimizers who want a single, budget-friendly parts kit to streamline a transmission service or partial rebuild on a Scion xD or other listed Toyota/Scion models.
Less Ideal for: Users seeking a documented, factory-identical complete rebuild set with confirmed part-by-part matching should consider kits with an explicit parts breakdown or buy individual OEM parts.
- Designed specifically for U340/U340E/U341/U341E 4-speed transmissions used in listed Scion and Toyota models
- Consolidates multiple gaskets and seals into one kit to simplify parts sourcing for a rebuild
- Sold by a brand that lists part number and basic vehicle application to aid fitment checks
- Product listing lacks a detailed parts list or materials specification which requires cross-checking with service manual
Verdict: A cost-conscious transmission gasket and seal kit that bundles common seals for U340/U341 4-speed services to simplify parts sourcing for a practical rebuild job.
4. ZIKAUTOX Transmission Rebuild Kit for U340/U341 4-Speed (fits Scion xA/xB/xD and select Toyota/Pontiac models)
| Manufacturer | ZIKAUTOX |
|---|---|
| Model | 1213759435 |
| Part Number | U340 U340E U341 U341E U341F |
| Includes | Overhaul gasket and seal kit, friction plates kit, steel plates kit |
This rebuild kit supplies the common wear items needed to overhaul a U340/U341 4-speed automatic transmission used in several Scion and Toyota models. It is typically used during a transmission tear-down to replace worn friction and steel plates plus all gaskets and seals, restoring clutch grip and preventing leaks. The kit includes an overhaul gasket and seal kit, a set of friction plates, and steel plates so you can refresh the internal friction train without sourcing individual parts. For DIY mechanics and independent shops the kit simplifies parts sourcing and speeds turnaround compared with buying pieces separately. Because the kit targets U340/U341 families it is a focused solution rather than a universal fit, so confirming application and comparing old parts is important before ordering. The product emphasizes straightforward replacement parts rather than upgraded performance components, so expect factory-style function rather than stronger-than-stock clutch capacity.
Best for: Balanced owners who prefer a single, ready-made rebuild kit for routine transmission overhauls and value convenience and correct-fit parts over performance upgrades.
Less Ideal for: Drivers seeking heavy-duty or performance clutch builds or those who need a universal kit for many transmission families should look for specialized or reinforced kits instead.
- Includes gaskets, seals, friction plates, and steel plates needed for a full clutch pack refresh
- Targets U340/U341 4-speed transmissions used in Scion xA, xB, xD and listed Toyota/Pontiac models
- Consolidates multiple parts into one kit to simplify sourcing and reduce assembly time
- Polished exterior parts suggest attention to finish which can aid installation fit
- Not an upgraded or performance-oriented kit; parts are intended as factory-style replacements
- Application coverage is limited to U340/U341 families so fitment must be verified against the vehicle
Verdict: A convenient, complete parts kit for restoring U340/U341 4-speed transmission clutch packs to factory-style condition.
5. Solarhome Transmission Rebuild Kit for Scion xB / Pontiac Vibe and Toyota Models
| Brand | Solarhome |
|---|---|
| Manufacturer Part Number | BL00350 |
| Compatible Transmissions | U340, U340E, U341, U341E, U341F |
| Included Parts | Overhaul gasket and seal kit, friction plates, steel plates |
This Solarhome rebuild kit is a complete package intended for rebuilding U340/U341 4-speed automatic transmissions used in Scion xB and several related Toyota models. It includes an overhaul gasket and seal kit plus friction and steel plate sets so you can replace the wear items that typically cause slipping or poor shift quality. In practice it is used during a transmission teardown to restore clutch engagement and eliminate leaks when combined with a proper sleeve of inspection and cleaning. The kit covers the common service items so a technician can avoid sourcing multiple parts separately, which speeds repairs and reduces the chance of missed components. The limitations are that it is a parts kit only so it does not include bearings, valve body components, or labor and the correct fit depends on confirming the transmission code or VIN before ordering. For risk-averse owners wanting a factory-style refresh on an older 4-speed, this kit supplies the core consumables needed for a thorough rebuild.
Best for: Risk-averse mainstream owners who prioritize restoring factory-like shift feel and stopping leaks on older 4-speed Toyota/Scion automatics and prefer a bundled parts set to minimize ordering mistakes.
Less Ideal for: Drivers who need a complete drop-in transmission replacement or those seeking performance upgrades beyond factory-spec components should look elsewhere.
- Includes overhaul gasket and seal kit to address common leaks
- Supplies matched friction plates and steel plates for clutch pack renewal
- Covers the core consumables needed for a full tear-down rebuild
- Single kit reduces parts hunting and speeds repair workflow
- Does not include bearings, valve body parts, or other internal hardware that may be needed
- Fitment requires verifying transmission model code or VIN to ensure correct application
Verdict: A convenient, all-in-one parts kit that supplies the essential gaskets and clutch plates needed to rebuild U340/U341 4-speed transmissions and restore reliable shifting.
6. U340/U341 Transmission Rebuild Kit for Scion xA/xB/xD
| Brand | unbrand |
|---|---|
| Item model number | U341 |
| Manufacturer Part Number | U340 |
This rebuild kit provides the internal components needed to rebuild the U340/U341 automatic transmission found in Scion xA, xB, and xD models listed for 2004 to 2007. It is typically used by experienced DIY mechanics or professional shops during a transmission overhaul to replace worn clutch packs, seals, and other soft parts that cause slipping or leaking. The listing identifies the kit by model numbers U340 and U341 and supplies the core parts required for a factory-style rebuild rather than bolt-in assemblies. For a performance-oriented buyer this kit lets you refresh the transmission’s internal wear items and pair it with upgraded fluids and tuning to restore shift quality and durability. Limitations are that the product is a parts kit only so it does not include a torque converter, valve body upgrades, or installation instructions, and fitment must be confirmed against your exact transmission code before purchase.
Best for: Performance-oriented owners who want to restore shift quality and internal durability by rebuilding the transmission themselves or through a shop and who prioritize component-level refresh over plug-and-play replacements.
Less Ideal for: Casual DIYers who lack transmission experience or owners seeking complete bolt-in solutions that include converters and valve body upgrades should consider alternative options or professional remanufactured units.
- Marketed specifically for U340/U341 transmissions used in Scion xA, xB, and xD models
- Includes the internal replacement parts needed for a comprehensive rebuild
- Sold as a full kit which simplifies sourcing multiple wear items at once
- Does not include torque converter, valve body, or detailed installation instructions
- Branding and part provenance are minimal which may concern buyers seeking OEM-sourced parts
Verdict: A focused rebuild kit for U340/U341 Scion transmissions that lets performance-minded buyers replace internal wear parts and restore shift quality.
7. QUXTOR Transmission Rebuild Kit for Scion xD (U340/U341 4-Speed)
| Manufacturer | QUXTOR |
|---|---|
| Model | 1213759435 |
| Part Number | U340 U340E U341 U341E U341F |
| Applications | Scion xD, xA, xB; Toyota Corolla, Matrix, Yaris; Pontiac Vibe |
This QUXTOR transmission rebuild kit supplies the common internal wear components needed when overhauling a U340/U341 4-speed automatic transmission. It is designed for vehicles such as the Scion xD and includes an overhaul gasket and seal kit plus friction and steel plates so you can replace worn clutch packs and seals during a rebuild. For DIY mechanics and independent shops this kit simplifies sourcing because it gathers the basic consumables in one package, which helps restore shift quality and reduce leaks when installed correctly. The practical limitation is that the kit does not include bearings, snap rings, or any re-machining services, so it covers the typical friction and sealing items but not every possible internal failure. Installation requires transmission disassembly, inspection of drums and pistons, and in some cases replacement of additional hard parts, so factor in parts you may need beyond what is included.
Best for: Risk-averse mainstream owners who prefer a factory-style rebuild approach and want a single kit that covers common wear items when servicing a Scion xD transmission.
Less Ideal for: Shops or owners looking for a complete remanufactured transmission or a kit that includes every internal hard part and machining services should consider other options.
- Complete set of gaskets and seals bundled with friction and steel plates for a standard U340/U341 rebuild
- Targets common wear items that restore clutch engagement and reduce internal leaks
- Single-package solution that reduces time spent sourcing multiple small parts
- Does not include bearings, snap rings, clutches beyond plates, or hard parts that often require replacement
- Not a drop-in remanufactured unit so requires transmission teardown and proper installation
Verdict: A practical parts kit that supplies the essential gaskets, seals, and clutch plates needed to perform a U340/U341 transmission rebuild on a Scion xD.
Choosing the Right Scion xD Transmission Rebuild Kit: Key Factors to Consider
Component Completeness
A comprehensive kit should include all seals, gaskets, O-rings, and any wear parts commonly replaced during a rebuild. Missing small items can force repeat disassembly and add time and expense to the job.
Look for kits that list each included component and match that list against the transmission's service manual. Component completeness reduces the chance of leaks and helps ensure internal clearances and hydraulic function are restored during reassembly.
Fitment and Compatibility
Correct fitment to the Scion xD transmission model is critical to avoid installation errors and functional problems. Kits that specify exact model years, transmission codes, or engine pairings help ensure the parts align with the vehicle's internal layout.
Poorly matched parts can cause leaks, improper seal seating, or interference with internal linkages. Verify fitment details and confirm the kit covers the transmission variant you are rebuilding.
Material Quality and Durability
Sealing materials, gaskets, and friction components must resist heat, fluid exposure, and mechanical wear. Higher-quality elastomers and reinforced gaskets maintain sealing integrity under operating temperatures and pressure cycles.
Consider whether the kit uses OEM-equivalent materials or upgrades for longevity. Durable materials reduce the chance of premature failure and subsequent repairs.
Included Hardware and Installation Aids
Kits that include installation hardware, alignment tools, or torque specifications streamline the rebuild and reduce the risk of errors. Small hardware like snap rings, filter bolts, or pressure relief components are often overlooked but essential.
Installation aids and clear documentation save time and improve the accuracy of reassembly, which helps restore proper hydraulic function and clutch engagement.
Documentation and Technical Support
Clear parts lists, diagrams, and technical guidance are valuable, especially if you are performing the rebuild yourself. Documentation that details where each gasket and seal sits and any special installation notes reduces installation mistakes.
Availability of technical support from the kit supplier or manufacturer can help troubleshoot unusual fitment issues or clarify unclear steps during the rebuild process.
Warranty and Manufacturer Reputation
A warranty on parts covers defects and provides confidence in the kit's quality. Manufacturer reputation for consistent part dimensions and quality control reduces the risk of receiving defective or mismatched components.
Consider vendors with a track record of supplying transmission components and clear warranty terms. Reliable support and consistent part quality reduce downtime and the chance of repeat repairs.
How We Chose the Best Scion xD Transmission Rebuild Kit
We focused on kits that provide the correct parts and tolerances for Scion xD transmissions and prioritized completeness, material quality, and documented fitment. Our evaluation emphasized component coverage such as all necessary seals and gaskets, critical wear items that typically fail during rebuilds, and whether the kit included any upgraded parts or OE-equivalent components. We also considered clarity of fitment information and technical documentation to reduce installation risk, plus manufacturer quality control and backing for replacement components. Durability of sealing materials and the inclusion of hard-to-find internal components factored into rankings. We excluded generic, one-size-fits-all kits without clear Scion xD compatibility and any kits missing essential sealing or friction components. The resulting list reflects kits that meet practical rebuild needs and offer the specifications technicians and experienced DIYers expect.
Our full evaluation process is outlined in our review methodology.
FAQ
Do I need a full rebuild kit or just a seal kit for a Scion xD?
It depends on the symptoms and condition of internal components. If leaks are isolated and internal wear is minimal, a seal or gasket kit may address the issue. If there is wear on clutch packs, bushings, or suspect hydraulic components, a full rebuild kit that includes those parts is usually more appropriate to restore reliable operation.
How hard is it to install a transmission rebuild kit myself?
Difficulty varies with experience and tools. A rebuild requires disassembly, careful cleaning, measurement of clearances, and correct torqueing. Technically skilled DIYers with a service manual and proper tools can do it, but many people prefer a professional to ensure hydraulic systems and clearances are correctly restored.
What should I inspect before buying a rebuild kit?
Inspect the transmission for obvious wear signs such as metal particles, damaged clutch material, and excessive play in shafts. Also identify the transmission code and any model-specific variants, and cross-check the kit's parts list with the service manual to confirm it includes required seals and wear components.
Will a rebuild kit fix slipping and harsh shifting in a Scion xD?
A rebuild kit that replaces worn clutch components, seals, and hydraulic parts can resolve slipping and harsh shifts when those issues are caused by wear or fluid contamination. If symptoms stem from electronic controls or external drivetrain problems, the kit alone may not address the underlying cause.
How do I know the kit's seals will hold up to transmission fluid and heat?
Look for kits that specify material types such as heat-resistant elastomers or mention OEM-equivalent specifications. Documentation that lists material properties or states compliance with manufacturer standards is an indicator of suitable resistance to fluid exposure and operating temperatures.
Conclusion
Choosing the right Scion xD transmission rebuild kit comes down to matching completeness, fitment accuracy, and material quality to the condition of your transmission. Prioritize kits that list all necessary seals and wear parts, document exact fitment, and use durable materials to reduce the chance of repeat repairs. Balance the scope of the kit against the symptoms you observe: simple leaks might only need a seal kit, while worn internal components warrant a full rebuild kit. Good documentation and reliable support help ensure a smoother rebuild process and longer service life after repair.
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