Transmission and drivelineModel years 1999–2007Manufacturer
4L80-E / 4L85-E planetary gear whine in first and second gear
1999-2007 GMC Sierra, Yukon XL (and Avalanche, Express, Silverado, Suburban, Savana) with 4L80E (RPO MT1) or 4L85E (RPO MN8)
FaultCrate・4L80-E / 4L85-E planetary gear whine in first and second gear
The 4L80E/4L85E may have planetary gear whine noise in first and second gear.
The noise is typically louder in first gear than in second.
What to do
- Compare the vehicle with an identically built vehicle (same GVWR) before attempting any repairs.
- The correct end play is between 0.127-0.508 mm (0.005-0.020 in).
- If the noise is judged abnormal and the transmission was built after 9-01-03, perform the Rear Unit End Play Check (SI Document ID # 52027).
- If end play is out of specification, inspect and replace the output planetary gear set as necessary.
- If end play is within specification, replace the transmission assembly.
- Set rear end play between .005" and .020" using the correct selective thrust washer (674); target between .010" and .015".
If left
- This planetary gear whine can be characteristic of the 4L80E/4L85E.
In the records
- Output Planetary Gear Set: replaced 1
- Transmission: replaced 1
Applies to
- The bulletin covers 1999-2007 GMC Sierra and Yukon XL.
- It applies to vehicles with the 4L80E (RPO MT1) or 4L85E (RPO MN8).
See the evidence (2 documents, 11 passages)
| Document | Publisher | Date |
|---|---|---|
| [1]PIP3259J: Whine Noise In First And Second Gear ↗ | ManufacturerGeneral Motors (published by NHTSA) | 2012-12-17 |
| [2]PIP3259J Whine Noise In First And Second Gear ↗ | ManufacturerGeneral Motors | — |
Applies toThe bulletin covers 1999-2007 GMC Sierra and Yukon XL.
1999-2007 GMC Sierra, Yukon XL— [1] Models
Applies toIt applies to vehicles with the 4L80E (RPO MT1) or 4L85E (RPO MN8).
with 4L80E (RPO MT1) or 4L85E (RPO MN8)— [1] Models
First signsThe 4L80E/4L85E may have planetary gear whine noise in first and second gear.
The 4L80E/4L85E automatic transmission may experience a condition of planetary gear whine noise in first and second gear.— [1] Condition
First signsThe noise is typically louder in first gear than in second.
The planetary gear noise is typically louder in first gear as compared to second.— [1] Condition
What it does not lead toThis planetary gear whine can be characteristic of the 4L80E/4L85E.
This planetary gear whine noise can be characteristic of the 4L80E/4L85E.— [1] Recommendation
How to confirmCompare the vehicle with an identically built vehicle (same GVWR) before attempting any repairs.
The vehicle should be compared to an identically built vehicle (same GVWR) for comparison before attempting any repairs.— [1] Recommendation
How to confirmThe correct end play is between 0.127-0.508 mm (0.005-0.020 in).
The correct end play is between 0.127-0.508 mm (0.005-0.020 in).— [1] Recommendation
RepairIf end play is out of specification, inspect and replace the output planetary gear set as necessary.
If end play is out of specification, inspect and replace the output planetary gear set (661 - Output Carrier Assembly and 650 - Sun Gear) as necessary.— [1] Recommendation
RepairIf end play is within specification, replace the transmission assembly.
If end play is within specification, replace the transmission assembly.— [1] Recommendation
How to confirmIf the noise is judged abnormal and the transmission was built after 9-01-03, perform the Rear Unit End Play Check (SI Document ID # 52027).
If it is determined that a vehicle has an abnormal amount of noise and the transmission was built after 9-01-03, perform the Rear Unit End Play Check (SI Document ID # 52027).— [2]
RepairSet rear end play between .005" and .020" using the correct selective thrust washer (674); target between .010" and .015".
Set rear end play between .005" - .020" using correct selective thrust washer (674). Target between .010"-.015".— [2]
Put together by FaultCrate from public records and technical documents. The cause and the repair are for the workshop to decide with the vehicle in front of it. Counts are records, not failure rates.
List the records (1 that can be opened)
Records whose recall number, document number or text matches. Each line says why it matched.
- Planetary Gear Whine Noise in First and Second GearManufacturer communication 2017-08-15・document number matches