8-Speed Automatic Transmission Assembly for 2020-2023 Hyundai Sonata
Product Notes Read before buying
This is an 8-speed automatic transmission for vehicles with a 2.5L naturally aspirated engine and Front-Wheel Drive (FWD). It is specifically for models WITHOUT the automatic engine stop/start system.
Voice or type your vehicle details and Wrenchy will confirm fitment in seconds.
Vehicle Fitment Guide
This part fits the following vehicles:
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Preferred | Sedan | 2020 - 2023 | L4 2.5L | FWD | Automatic |
| SE | Sedan | 2020 - 2023 | L4 2.5L | FWD | Automatic |
| SEL | Sedan | 2020 - 2023 | L4 2.5L | FWD | Automatic |
| 2021 - 2022 |
Know This Transmission Before You Buy
The research behind our purchase interview — recalls, bulletins and real install economics for this transmission family:
A quick look at your own vehicle makes sure the right transmission shows up:
- Confirm the 8th digit of the VIN is 'J' or 'A' (naturally aspirated 2.5L engine).
- Verify the vehicle does not have a turbocharger or hybrid badging.
- Verify the vehicle is not equipped with the Idle Stop & Go (automatic engine stop/start) system.
- Locate the metal tag on the current transmission housing to match part number 45000-4G610 or 45000-4G611.
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- Engine support bar / hoist
- Transmission jack
- Professional-grade bi-directional scan tool (Hyundai GDS Mobile or equivalent)
Budget for these consumables at install:
- Hyundai Genuine SP-IV-RR (P/N 00232-19052) or SP4-M equivalent fluid
- Transmission pan gasket (P/N 46321-4G300)
- Torque converter / input shaft seal
- Axle seals
- Transmission cooler line flush solvent
What your vehicle’s computers will need after the swap:
What’s involved: TCM Adaptive Relearn and Oil Pressure Characteristics Input
sources differ: Arm 1 states mandatory 68-digit solenoid calibration code entry is required to prevent immediate damage, while Arm 2 focuses on standard TCM adaptive relearn — choose the more cautious approach and perform both using a dealer-level scan tool.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- The 68-digit barcode sticker on top of the transmission case must be photographed before installation because it is completely hidden once the unit is in the vehicle.
- The torque converter must be fully seated (three distinct clicks/drops) before bolting the transmission to the engine to avoid cracking the internal oil pump gear.
- Replacing this transmission requires dropping the entire front subframe and steering rack.
- The fluid level check must be performed without a dipstick, using the level check plug on the side of the case at a specific fluid temperature of 122°F to 140°F (50°C to 60°C).
Easy to get right once you know them:
- Confusing this conventional 8-speed automatic with the 8-speed wet Dual-Clutch Transmission (DCT) used in the Sonata N-Line.
- Skipping the mandatory solenoid calibration / oil pressure characteristics input and adaptive relearn.
- Using generic or incorrect ATF instead of the specified SP-IV-RR / SP4-M fluid.
- Failing to thoroughly flush the transmission cooler lines, leading to immediate contamination and failure.
Not issues with the units on this page — the manufacturer documented these for every transmission of this family, wherever you buy one. Handy for your installer:
🔎 Recommended at install: Replace the rear cover or the entire transmission assembly if ATF leak is present near the black pressure port check plug.
🔎 Recommended at install: Program the unique oil pressure characteristics of the new unit into the TCU to prevent harsh shifting and delayed engagement.
🔎 Recommended at install: Full transmission replacement is required if DTCs P0731 through P0736, P0729, P076F, or P0730 are present without sensor codes.
🔎 Recommended at install: Reset transmission adaptive values using a scan tool.
Researched from factory recalls, TSBs and OEM service data (reference unit 400-11122-5565250). Unit-specific details — mileage, condition, warranty, freight — are covered in the checkout interview.
Policies, in plain English.
Shipping & Handling
- Ships by LTL freight on a pallet — a real freight truck, not a parcel van
- Your checkout freight quote covers delivery to your door (liftgate service included for residential addresses)
- The carrier calls ahead to schedule a delivery window — someone must be present to receive it
- Typically palletized and picked up within 2–3 business days; transit time depends on distance
120-Day Warranty
This part includes a 120-day warranty.
- If the part fails within the warranty window, we'll replace it or refund per the coverage terms
- Coverage is parts-only — installation labor is not included
- Warranty covers defects — not installation errors, misuse, or damage after installation
Your pre-purchase interview reviews these exact terms with you before anything is charged.
Returns (30 Days)
We accept returns of uninstalled parts within 30 days of delivery for this part.
- Defective parts: We will replace the part or issue a refund at our discretion
- Programming: "Needs to be programmed to my vehicle" is not a valid return reason. Many modules require dealer programming — we're happy to help connect you with resources if your dealer says it's not programmable
- Return shipping: This part ships by freight (LTL) — the part price is refundable per the terms above, but shipping costs are non-refundable and return freight follows the seller's return terms. Your pre-purchase interview walks through the exact numbers before you buy
- Parts must be returned in original packaging and unmodified condition
- Poorly packaged returns that arrive damaged will not be credited
Damaged in Shipping?
Freight damage is rare — and you're fully protected when you do two things at delivery:
- Inspect before you sign — you're allowed time to look the pallet over while the driver waits
- Write any damage on the delivery receipt before signing — that one line is what makes a freight claim succeed
- Severe damage? Refuse the delivery — it goes back at no cost to you and we make it right
- Photograph the pallet before unwrapping; report concealed damage within 24 hours of delivery
We handle the carrier claim — you just help document it. Your pre-purchase interview walks through this checklist too.
Order Cancellation
Cancel before shipment for a full refund. Once the pallet has been built, a preparation charge may apply — and once the freight carrier picks it up, shipping costs are non-refundable and standard return terms apply. Your pre-purchase interview shows the exact numbers before you pay.
Expert Guides
2021-2023 Hyundai Santa Fe 2.5L A8MF1/A8LF1: Problems, Identification, and Used Replacement
Identify the exact AWD transmission your naturally aspirated Santa Fe needs, what causes premature failures, and how to successfully install a used replacement unit.
Read Full Guide →Related Trouble Codes (OBD-II)
4 matching guidesIf your scan tool is showing one of these trouble codes, this part is a common fix. Each guide explains the code, how to diagnose it, and exactly what to replace.
Miscellaneous Information
OEM Part Numbers:
Hyundai: 002684G611, 450004G611
Fits Years: 2020 2021 2022 2023
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This unit ships with the selling yard's 120-day warranty. Longer plans can be requested during checkout.
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