Subject: | 4T45-E Automatic Transmission (RPO MN5/ME7) -- No Reverse, Binds in Reverse, No Movement, DTC P0756 (Perform Appropriate Repair as Outlined in Bulletin) |
Models: | 2008 Buick LaCrosse (Export China Only), LaCrosse Hybrid (Export China Only) |
| 2008 Chevrolet Cobalt, HHR, Malibu, Malibu Hybrid, Malibu Classic |
| 2008 Saturn AURA, AURA Hybrid, VUE, VUE Hybrid |
| with Hydra-Matic® 4T45-E Automatic Transmission (RPOs MN5 (Non-Hybrid) or ME7 (Hybrid)) |
Condition
Some customers may comment on one or more of the following conditions:
In some cases, a scan tool may reveal DTC P0756 set.
Cause
The cause of this condition may be due to direct coast clutch failure.
Correction
A new direct clutch plate has been released mid-year with different friction plate material. If a vehicle has a direct coast clutch failure or a repair that requires a major overhaul, use the information below to determine the appropriate repair. Information
will be specific to the model number of the transmission.
For 2008 1st Type 4T45E Models
8EBJ (2008 Chevrolet Malibu Classic Only)
- DO NOT change the spacer plate.
- Replace the Pressure Control Solenoid with P/N 24225825.
- Use direct clutch plates, P/N 24234041 or clutch plate kit, P/N 24238567.
- Inspect the following components:
• | Reverse Clutch Assembly |
• | Pressure Switch Manifold |
- If required, use Transaxle Overhaul Kit, P/N 24242026.
8BAJ, 8BBJ, 8EHJ, 8EWJ, 8EPJ, 8EVJ, 8FWJ, 8ELJ, and 8THJ
- Replace the Pressure Control Solenoid with P/N 24225825.
- Replace the Conversion Control Valve Kit, P/N 24247456 (Non-Hybrid) or P/N 24247457 (Hybrid).
- Inspect the following components:
• | Reverse Clutch Assembly |
• | Pressure Switch Manifold |
- Reprogram the TCM with updated calibrations. Contract Techline Customer Support Center.
- Some parts in the following kits may be required.
• | Transaxle Overhaul Kit, P/N 24242026. |
• | Clutch Plate Kit, P/N 24245903 (All fiber plates). Must also use Conversion Control Valve Kit, P/N 24247456 (Non-Hybrid) or 24247457 (Hybrid). |
For 2008 2nd Type 4T45E Models
8CKJ (Export China Only), 9BAJ, 9BBJ, 9EJJ, 9EWJ, 9EPJ, 9EVJ, 9FXJ, 9EMJ, and 9THJ
- Overhaul as required using Transaxle Overhaul Kit, P/N 24242026 and either Clutch Plate Kit, P/N 24245903 or P/N 24245360, which will have the new Direct Coast Clutch plates.
- Replace the Pressure Control Solenoid with P/N 24225825.
The following pictures show how to identify 1st and 2nd type direct coast fiber plates and spacer plates.