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Horizon Auto Parts The Future of Reliable Auto Parts OEM Verified | Professionally Sourced | Fitment Confirmed 2015 to 2016 Hyundai Elantra 1.8L
6-Speed Automatic Transmission
OEM Used | Oil-Drained | Torque Converter Included
Product Specifications Part Type Automatic Transmission Assembly Fitment 2015 to 2016 Hyundai Elantra 1.8L (ONLY) Transmission Speeds 6-Speed Automatic Engine Size 1.8L Nu 4-Cylinder DOHC Condition Used OEM, Oil-Drained OEM Part Number 4500026AC6 / 4500026AC7 Interchange Number 62921 Included Torque Converter Mileage Contact seller for confirmation Origin Made in United States OEM Verified Genuine factory part Freight Ready LTL packed for transit 1-Month Warranty Clear written terms Pre-Sale Support Fitment help on request Technical Reference Hyundai Official Service Bulletin: TSB 14-AT-008
Automatic Transaxle Control Module, Reset and Relearn Adaptive Values
What this means for you as a buyer: This is a real, official Hyundai service bulletin issued directly to dealerships and certified technicians. It covers every Hyundai automatic transaxle vehicle, including the 2015 to 2016 Elantra Sedan 1.8L (chassis MD/UD), and it explains a critical post-installation step that must not be skipped.
"After the following repairs have been completed, the PCM/TCM adaptive values must be reset in order to provide optimum shift quality: Replace automatic transaxle or PCM/TCM."
Why This Matters
The transmission's PCM/TCM learns and stores shift patterns over time based on the original vehicle - When a used transaxle is installed in a different vehicle, those stored values do not match the new vehicle's engine and driving behavior
- Result: hard shifting, rough gear changes, or hesitation, none of which indicate a defective part
- A simple reset and relearn procedure using a GDS scan tool resolves this completely
What Your Installer Must Do
Connect a GDS (Hyundai diagnostic scan tool) to the vehicle - Navigate to A/T menu, Option Treatment, Reset Auto T/A values
- Perform relearn drive cycle: accelerate through all gears and repeat 5 times
- Confirm ATF temperature is within 104 to 212F (40 to 100C) during the procedure
- This is a standard, documented dealership procedure, not a repair
TSB 14-AT-008 Confirmed Coverage for This Part
Source: Hyundai Motor America Official Technical Service Bulletin 14-AT-008, NHTSA ID SB-10059668-2273
Verify Fitment Before You Purchase
Same year, make, and model does not always guarantee compatibility. Differences in engine variant, transmission code, trim level, production date, electrical connectors, software calibration, and factory-installed options can all affect whether this part will work in your specific vehicle.
To confirm compatibility, send us via Message:
Full 17-digit VIN number - Current OEM part number from your existing unit
- Year, Make, Model, Trim
Engine size and transmission type - Photos of original part if available
- Production date from driver door jamb sticker
Part Condition
This is a used OEM part pulled from a donor vehicle - Oil has been drained for safe transport
- Unit is not rebuilt, remanufactured, or aftermarket
- Cosmetic wear consistent with normal use may be present
Review all listing photos carefully before purchase - Torque converter is included with this unit
- Condition classified as Used Functional OEM
- Message us for mileage confirmation before ordering
Warranty Policy What Is Covered
1-month warranty on the part itself - Applies when installed properly per OEM procedures
- PCM/TCM relearn must be performed after install
- Warranty is for the part, not labor costs
What Is Not Covered
Labor, installation, or diagnostic costs - Damage from improper installation or incorrect diagnosis
- Skipping PCM/TCM reset and relearn procedure
- Fluid contamination, overheating, or electrical damage
- Compatibility issues when fitment was not verified
Shipping and Delivery
Ships via LTL Freight (large part) - Liftgate delivery available on request
- Tracking updates may be delayed after carrier pickup. This does not mean the item has not shipped.
- Delivery time varies by destination and freight conditions
Commercial or residential delivery, confirm at checkout - Large freight items may require loading dock, forklift, or terminal pickup in some areas
- Inspect all freight deliveries before signing. Note any visible damage on the delivery receipt.
- Contact us immediately if damage is found at delivery
Why Horizon Auto Parts Professional Operation
OEM Quality Standard
Pre and Post-Sale Support
Clear Expectations
Know What You Are Buying Correct Part
Clear Warranty
Real Support
Ready to Order? Let Us Make Sure It Is Right.
Message Us On Before Purchase
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