Automatic Transmission Assembly for 2011 INFINITI G37
Product Notes Read before buying
This is a 7-speed automatic transmission for rear-wheel drive (RWD) G37 Sedan models manufactured between October 2010 and May 2011 only. It will not fit AWD models, coupes, convertibles, or vehicles produced outside this specific date range.
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 |
|---|---|---|---|---|
| Journey | Sedan | 2011 | V6 3.7L | RWD | Automatic | Hollander: INFINITI G37 11 AT; (7 speed), Sdn, RWD, from 10/10 thru 5/11; drive_type: include RWD; engine_size: include 3.7L; transmission: include Automatic [inferred] |
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 vehicle is Rear-Wheel Drive (RWD) and a Sedan.
- Check driver-side door jamb sticker for production date (must be between 10/10 and 05/11) and transmission code 'RE7R01A'.
- Verify original transmission barcode sticker features OEM part number '31020-X350E' or identifier 'X350E'.
- Check electrical connector pin count (early 12/13-pin vs late 10-pin).
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- Heavy-duty transmission jack
- Long extensions (30+ inches) with 19mm swivel socket
- Infiniti Transmission Fill Adapter (Tool #ATF 180)
- Fluid pump
- Infrared thermometer or professional scan tool
- Infiniti CONSULT-III Plus scan tool (for programming)
Budget for these consumables at install:
- Nissan Genuine Matic S ATF (approx. 9.7 to 9.75 quarts for dry fill)
- Internal transmission filter
- Metal oil pan gasket (OEM Part #31397-1XJ0A)
- Front pump/torque converter input seal
- Transmission cooler-line flush solvent
What your vehicle’s computers will need after the swap:
What’s involved: TCM adaptive relearn and VIN-specific programming/re-marriage
Sources differ: Arm 1 states programming is mandatory to match the replacement TCM to the vehicle VIN. Arm 2 notes that a like-for-like swap may not require programming, and a common DIY workaround is to swap the original valve body and TCM into the replacement transmission to avoid programming entirely. Cautious value 'model_dependent' selected.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- Torque Converter Seating: Must rotate and feel three distinct clicks/drops to seat fully. Failure to do so will crack the internal oil pump upon bolting to the engine.
- Top Bellhousing Bolts: Extremely tight clearance; requires lowering the crossmember slightly to tilt the engine back and using a 3-foot extension with a swivel socket.
- No Dipstick / Complex Level-Checking: Must pump fluid through the bottom overflow plug, run engine to exactly 40C (104F), and let excess drain to a drip.
- Cooler Line & Radiator Inspection: Must pressure-test radiator and flush lines to prevent residual debris or coolant from destroying the replacement unit.
Easy to get right once you know them:
- Ordering for the wrong production date, body style, or drivetrain (AWD vs RWD).
- Using universal or multi-vehicle ATF instead of Nissan Matic S.
- Skipping the TCM programming or adaptive relearn, leading to limp mode or harsh shifts.
- Reusing a contaminated radiator after a coolant-contamination (SMOD) failure.
- Forcing the transmission to the engine block when the torque converter is not fully seated.
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: Reprogram both the Engine Control Module (ECM) and the Transmission Control Module (TCM) using the Infiniti CONSULT diagnostic tool.
🔎 Recommended at install: Update TCM and ECM software.
🔎 Recommended at install: None required; ATF naturally darkens to a very dark color within 2,000 to 3,000 miles of operation.
🔎 Recommended at install: Replace or repair the internal control valve/TCM assembly (the sensor itself is rarely the issue; the internal TCM fails due to heat).
🔎 Recommended at install: Pressure-test radiator, flush cooler lines thoroughly, or replace radiator/install an isolated external transmission cooler.
Researched from factory recalls, TSBs and OEM service data (reference unit 400-51878B-2513522). 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
2011 Infiniti G37 7-Speed Automatic Transmission: Problems, Identification, and Used Replacement
Identify the exact RE7R01A transmission for your RWD Sedan, understand the P0720 and SMOD failures that kill it, and learn what to check before buying a used replacement assembly.
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:
Infiniti: 31020-X350E, 31020X350E
Other: X350E
Fits Years: 2011
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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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