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If your Scion xB is showing slipping, delayed engagement, or rough shifts, a proper transmission rebuild kit can return drivability and extend service life. Choosing the right kit matters because kits vary in included seals, gaskets, and internal components, and correct fitment is essential for a durable repair. This guide covers our top 5 shortlisted transmission rebuild kits for the Scion xB. We evaluated each option for component completeness, fit and compatibility, and overall potential for restoring reliable transmission function. Read on to see the selection criteria and what to check before you buy or install.
Looking for other parts? See all Scion xB parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | ZIKAUTOX Transmission Rebuild Kit for U340/U341 4-Speed (fits Scion xA/xB/xD and select Toyota/Pontiac models) |  |
| Best Quality Built to a higher standard if you want something more solid | U340/U341 Transmission Rebuild Kit for Scion xA/xB/xD |  |
| Best Budget The cheapest option that still gets the job done reliably | Molloparts Transmission Rebuild Kit for U340/U341 4-Speed (fits Scion xB / Pontiac Vibe / Toyota 1.5-1.8L) |  |
| Highest Rated A top-rated pick with lots of positive feedback | INGKAN U240E/U241E Transmission Master Rebuild Kit (T13600B) |  |
| Best Seller A high-volume bestseller chosen again and again | Solarhome Transmission Rebuild Kit for Scion xB / Pontiac Vibe and Toyota Models |  |
1. 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.
2. 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.
3. Molloparts Transmission Rebuild Kit for U340/U341 4-Speed (fits Scion xB / Pontiac Vibe / Toyota 1.5-1.8L)
| Manufacturer | Molloparts |
|---|---|
| Transmission | U340 U340E U341 U341E U341F 4-Speed Automatic |
| Package Included | 1 x Transmission Rebuild Kit |
| Special Features | Stemless |
This Molloparts transmission rebuild kit supplies the internal components needed to refresh a U340/U341 4-speed automatic used in Scion xB and related Toyota models. It ships as a single package intended for a full rebuild and is aimed at DIY mechanics or independent shops tackling worn clutches, seals, and bands. The listing emphasizes compatibility with 1.5L and 1.8L applications and claims parts are made to quality standards for stable performance. For a budget-focused project it offers an economical way to repair a slipping or leaking transmission without buying a reman or new unit. Expect to spend time verifying part numbers and comparing included pieces to your core since the kit is a non-factory replacement and may not cover every scenario or variant. Installation requires transmission disassembly skills and common rebuild tools, so labor and precision determine the final result rather than the kit alone.
Best for: Budget-conscious DIYers or independent shops who want to rebuild a U340/U341 4-speed transmission in a Scion xB and prefer saving money over buying a remanufactured unit.
Less Ideal for: Those without transmission teardown experience or anyone who needs a guaranteed factory-match rebuild; professional remanufactured units are better for zero-risk restorations.
- Sold as a complete rebuild kit intended to replace internal components for U340/U341 4-speed transmissions
- Compatible list explicitly includes Scion xB and the related Toyota/Pontiac 1.5L–1.8L applications
- Economical alternative to a remanufactured transmission for budget repair projects
- Marketed as built to strict quality standards with parts meant for stable operation
- Non-factory replacement so fitment and exact part coverage must be confirmed against the donor transmission
- Kit contents are not itemized in the listing, requiring careful inspection before installation
Verdict: An affordable rebuild kit that lets budget-minded owners rebuild a U340/U341 4-speed transmission in Scion xB and related Toyota/Pontiac models without buying a reman.
4. INGKAN U240E/U241E Transmission Master Rebuild Kit (T13600B)
| Brand | INGKAN |
|---|---|
| Model | U240E U241E T13600B |
| Manufacturer Part Number | ING-T13600B |
This INGKAN U240E/U241E master rebuild kit supplies the clutch discs, gaskets, and other service components needed when overhauling a U240E/U241E automatic transmission. It is intended for a full shop or DIY rebuild where worn clutch packs, seals, and gaskets are replaced to restore shifting firmness and stop leaks. Notable features include a full selection of internal gaskets and clutch plates matched to the U240E/U241E family and a stated focus on durable materials intended to resist wear. In practice the kit speeds a rebuild by bundling the commonly replaced internal parts so you do not hunt for individual pieces, and it can help return shift feel closer to factory when installed correctly with proper machining and fluids. Limitations are that the kit does not include hard parts such as bands, valve body overhaul components, or bearings, and a proper rebuild still requires inspection, measuring, and possible additional parts or machining for long-term reliability. Fitment must be confirmed for Scion xB models that use the U240E/U241E transmission before installation.
Best for: Reliability-focused owners seeking a consolidated parts kit to perform a careful rebuild of a U240E/U241E transmission and restore dependable shift quality.
Less Ideal for: Those who want a complete drop-in solution without further inspection or machining or owners whose Scion xB does not use the U240E/U241E transmission should look elsewhere.
- Complete set of internal gaskets and clutch discs for U240E/U241E rebuilds
- Designed to replace most commonly worn internal transmission components in one kit
- Helps restore shifting firmness and address internal leaks when paired with proper servicing
- Does not include external hard parts such as bands, valve body components, or bearings that may be needed
- Requires transmission inspection and possible additional machining or parts for a durable rebuild
Verdict: A single-purchase rebuild kit that bundles the internal gaskets and clutch plates needed to restore a U240E/U241E transmission's shift quality.
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.
Choosing the Right Scion xB Transmission Rebuild Kit: Key Factors to Consider
Component Completeness
A kit should include the collection of seals, gaskets, filters, and internal components necessary for the scope of the rebuild you intend. Missing items force additional purchases and can introduce delays or compatibility uncertainty.
Evaluate whether the kit covers consumables like sealing rings and gaskets plus any wear parts that commonly fail in the Scion xB transmission. Full kits reduce the risk of installing worn parts that cause early failure and simplify planning for required tools and replacement intervals.
Fitment and Vehicle Specificity
Accurate fitment information ensures the parts match the Scion xB transmission variant and avoid time-consuming trial and error. Transmissions can differ by model year, engine pairing, or market, so clear compatibility details matter.
Choose kits that list exact transmission codes or clear application notes. Kits designed specifically for the Scion xB reduce the chance of incorrect bolt patterns, mismatched sensors, or filler locations that complicate installation.
Seal and Gasket Quality
Seals and gaskets are critical to prevent leaks and maintain hydraulic pressure inside the transmission. Inferior materials can harden or swell and lead to persistent leaks or slipping.
Look for kits that specify durable elastomers and well-cut gaskets. Attention to material quality and proper sealing geometry is especially important in sections exposed to heat and friction, where long-term sealing performance affects reliability.
Included Wear Components
A rebuild is most effective when worn friction elements, bushings, and other wear-prone parts are replaced alongside seals. Kits that include these items reduce the chance of early rework and help restore proper valve body and clutch operation.
Determine which wear components are included and whether they align with common failure modes for the Scion xB transmission. Replacing these parts during the rebuild can improve shift quality and extend time between major services.
Instructions and Parts Documentation
Clear parts lists and installation guidance reduce installation errors and help you verify that the kit matches the job. Well-documented kits make it easier to identify missing items and to follow torque or sequencing notes during reassembly.
Prefer kits that provide exploded diagrams, itemized lists, or reference to service procedures. Good documentation is useful for both DIY mechanics and professional shops to ensure correct assembly and to speed troubleshooting if issues arise.
Durability and Materials
Materials used for bushings, seals, and friction components affect longevity and resistance to heat and contamination. Robust materials help the rebuilt transmission tolerate real-world driving conditions.
Assess whether the kit describes material upgrades or hardened parts where appropriate. Consider how component choices relate to expected service life, and whether the kit supports a durable repair versus a short-term fix.
How We Chose the Best Scion xB Transmission Rebuild Kit
We focused on kits specifically intended for the Scion xB platform and prioritized options that include the core components needed for a comprehensive rebuild. Key evaluation criteria included component completeness, such as seals, gaskets, filters, and any friction or hardened parts; accuracy of fitment information for the Scion xB transmission model; material quality and expected durability of wear items; clarity of installation guidance or parts lists; and the balance between component coverage and likely longevity. We excluded kits that only offered partial coverage with minimal seals or single-item replacements, plus any listings that lacked clear vehicle fitment data. We did not include complete remanufactured transmissions or generic universal kits that require extensive modification. The final list emphasizes kits that provide the correct transmission rebuild components for the Scion xB and that make a full or near-full overhaul feasible without extensive supplementary purchases.
Our full evaluation process is outlined in our review methodology.
FAQ
How do I know which Scion xB transmission rebuild kit fits my vehicle?
Check your vehicle identification and the transmission code on the case or service documentation. Kits that list specific transmission codes or model years make it easier to confirm fitment. When in doubt, match the kit part list and bolt patterns to the transmission you are servicing.
Does a rebuild kit include everything needed to overhaul the transmission?
Many kits include seals, gaskets, filters, and commonly replaced wear parts, but content varies. Some kits are comprehensive while others are partial. Review the included components list closely and plan to source any missing items before starting the job.
Should a DIYer attempt a transmission rebuild on a Scion xB?
A rebuild can be approached by experienced DIYers who have proper tools, a clean workspace, and familiarity with transmission assembly. The task requires precision and attention to sealing surfaces and torque specs. If you are unsure of the procedures, consider professional support to avoid costly rework.
How long does a transmission rebuild typically take with a complete kit?
With the right tools and a complete parts kit, a thorough rebuild usually takes multiple days, factoring disassembly, inspection, replacement of components, and careful reassembly. Time depends on your experience level and access to proper equipment, such as a lift and torque tools.
What are common signs that a rebuild kit should replace specific components?
Look for leaks, slipping under load, delayed engagement, metal debris in the fluid, or inconsistent shift quality. These symptoms often point to worn seals, gaskets, or friction components that a rebuild kit can address when combined with inspection and proper reassembly.
Conclusion
When selecting a transmission rebuild kit for a Scion xB, prioritize complete kits with clear fitment information and high-quality seals and wear components. Component completeness and accurate vehicle specificity reduce the risk of installation errors and repeat repairs. Balance the scope of the kit against the condition of the transmission you are repairing. Good documentation, durable materials, and coverage of common wear items will help you achieve reliable shift quality and extend the time before the next major service.
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