P0732 on Jeep: How to Diagnose & Fix
Gear 2 Incorrect Ratio
2 Jeep models · 2 documented issues · 1 critical · $150-$1,500 repair
P0732 on Jeep by model: symptoms, diagnosis and fix
DaimlerChrysler TSB 08-016-05 describes an internal TCM circuit fault that may cause an intermittent low-line-pressure or gear-ratio DTC and limp-in on a specific 2004 WJ/WG Grand Cherokee population. The vehicle must have the 545RFE (sales code DGQ), a 4.7L or 4.7L High Output engine, and fall within the bulletin's April 7, 2004 through February 27, 2005 vehicle build range. Suspect TCMs have date codes 0984 through 0405. The bulletin does not justify buying filters, fluid, a cooler, valve-body kits, or a solenoid pack from the symptom alone.
Common Symptoms
- Intermittent transmission limp-in mode
- Malfunction indicator lamp with a low-line-pressure or gear-ratio fault
- P0868 line-pressure-low fault
- P0731-P0736 or P1736 gear-ratio fault
How to Fix
Confirm the VIN build record, 545RFE sales code DGQ, stored transmission DTCs, and TCM event data. Read digits three through six of the TCM barcode; TSB 08-016-05 identifies 0984 through 0405 as the suspect controller build range. If the vehicle or controller date is outside scope, the bulletin does not apply and the transmission complaint needs its normal diagnostic path. For an in-scope vehicle, use the bulletin's P0868/gear-ratio decision path and compare desired, scan-reported actual, and mechanically measured line pressure with correct fluid level and temperature. Inspect wiring, connectors, cooler lines, leaks, and engine driveability first. The repair may involve the TCM and, when low pressure was present, inspection for clutch-disc damage; it is not a universal retail-parts fix.
Owner tips & cautions
- WarningDo not apply this TSB to every 45RFE/545RFE complaint. It requires a 2004 WJ/WG, 4.7L/4.7L H.O., sales code DGQ, the bulletin's vehicle build range, a listed DTC, and a suspect TCM date code.
- TipPreserve the TCM event data before clearing codes. The bulletin uses that data and the controller barcode date to separate a controller fault from actual low pressure and clutch damage.
- WarningA filter kit, ATF, cooler, Sonnax valve, separator plate, or solenoid pack is not a complete answer to this card. The old links represented different failure paths and have been removed.
Sources for this issue (3)
JK Wranglers with the 42RLE 4-speed automatic exhibit a torque-converter-clutch (TCC) shudder felt as a steady-state vibration or shimmy, typically during light throttle/partial converter lockup and most noticeable when the transmission is at moderate operating temperature. Chrysler acknowledged the condition on 2007 JK Wranglers in TSB 21-001-08 Rev. B (February 2008), which addresses TCC shudder and shift-quality concerns (1-2, 2-3, 3-4 upshift bumps) and DTC P0732. The shudder stems from the converter clutch lining/fluid interaction and TCM calibration; left unaddressed it can progress to harsh shifts.
Common Symptoms
- Steady-state shudder/vibration at light throttle (~30-50 mph)
- Shudder most pronounced at moderate transmission temperature
- Upshift bumps on 1-2, 2-3, or 3-4 changes
- Sensation like driving over rumble strips during cruise
- DTC P0732 (gear ratio) in some cases
How to Fix
Per Chrysler TSB 21-001-08 Rev. B: reflash/reprogram the PCM/TCM with updated software and replace the torque converter as required. Confirm correct fluid level and use the specified ATF+4 fluid; a fluid/filter service with fresh ATF+4 sometimes reduces mild shudder. If shudder persists after the reflash, replace the torque converter. Verify with a road test across the temperature range where the shudder occurred.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Mopar R5093944AF remanufactured 42RLE torque-converter kitOEMMopar R5093944AF
Converter replacement when true TCC/EMCC shudder is reproduced and the applicable service branch requires revised-friction hardware Fitment/availability: 2007-2011 Wrangler 3.8L/42RLE family after VIN confirmation; supersedes 05093944AB …
- Genuine Mopar 68218057AC ATF+4 automatic-transmission fluid, one quartOEMMopar 68218057AC
Required licensed fluid for a diagnosed 42RLE service or refill after converter replacement Fitment/availability: One-quart ATF+4 bottle; use the service-manual quantity and temperature-based level procedure. Not a standalone cure and no…
- Genuine Mopar 68059549AA 42RLE transmission filter with 6032780 O-ringOEMMopar 68059549AA + 6032780
Filter and pickup-seal renewal when pan inspection/service is part of the confirmed repair Fitment/availability: 2003-2011 Wrangler TJ/JK equipped with 42RLE; includes the specified O-ring. Confirm transmission and do not install as a su…
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Sources for this issue (2)
P0732 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0732 mean on a Jeep?
P0732 stands for "Gear 2 Incorrect Ratio." This code means the transmission control module detected that the gear ratio in 2nd gear does not match what it expects when the transmission is commanded into that gear. The computer compares input (turbine) speed to output shaft speed; if the math for 2nd gear is wrong, it sets this code. It usually points to internal slipping or a hydraulic/electronic control fault rather than a sensor reading error. On Jeep it is documented across 2 models: Grand Cherokee, Wrangler.
What are the most common causes of P0732?
The most common causes of P0732 are: Low or dirty/degraded transmission fluid, Worn or slipping friction element (clutch or band) that holds 2nd gear, Faulty shift solenoid, Valve body or pressure control problems, Internal mechanical wear or damage in the transmission, Clogged transmission filter restricting flow, Faulty input/output speed sensor giving skewed data. The specific cause varies by vehicle.
How much does it cost to fix P0732 on a Jeep?
Published repair estimates on Jeep range from $150 to $1,500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.