400, 4L80-E, 4L85-E
Case Bushing
Part No. 34006-SP
The OE case bushing in vehicles with a GM THM-400, 4L80-E and 4L85-E transmissions tends to walk out of the housing bore. This leaves the output shaft unsupported, ruins the governor gear and can cause case damage. The no-walk flange feature of the Sonnax case bushing 34006-SP is specially designed to keep the bushing in the case bore.
- High-quality bronze
- Flange on the transmission case side prevents bushing from walking completely through the bore
- Flange accurately locates and helps retain the selective washer
- Machined oil grooves allow for a supply of lubricating oil to enter the extension housing as well as the transmission case.
The housing bore should measure between 2.1285"/2.1295" in diameter for an ideal fit. When damage to the case is so severe that bore diameter is larger
than 2.129", use Sonnax oversized case bushing [34006-OS](not included). See instructions for details.
- Material: Bronze
- Bushing Style: Precision
- Width: 0.690"
- Shaft Dia.: 2.006"
- Housing Bore: 2.129"
No Walk-Out Case, Aftermarket Solid Bushing
Specifications
Transmissions
| Name | Years |
|---|---|
| THM400 | 1985 - 1992 |
| 4L80-E | 1991 - 2009 |
| 4L80-E-HD/MN8 | 2002 - 2002 |
| THM-R2/MT1 | 1991 - 1991 |
| 4L85-E | 2002 - 2009 |
| 3L80 | 1992 - 1993 |