Transmission Parts GM TH400 4L80-E 4L85-E Case Bushing
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Symptoms:

  • Bushing walks out

Cause:

Lack of flange or stop surface on the case bushing.

Correction:

Sonnax no walk-out case bushings are flanged to prevent movement in either direction.

4L80-E, 4L85-E, TH400

Case Bushing
Part No. 34006-SP

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The OE case bushing in vehicles with a GM TH400, 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 not measure more than 2.1285" in diameter for an ideal fit.

  • Material: Bronze
  • Bushing Style: Precision
  • Width: 0.630"
  • Shaft Dia.: 2.006"
  • Housing Bore: 2.129"
  • 4L80-E, 4L85-E, TH400 Case Bushing 34006-SP

Related Sonnax Parts

Required

Recommended

4L80-E, 4L85-E, TH400 Heavy Duty Case Bushing Kit 34006-SPB

4L80-E, 4L85-E, TH400

Heavy Duty Case Bushing Kit 34006-SPB

Required

Recommended

4L80-E, 4L85-E The Sure Cure® Kit SC-4L80E

4L80-E, 4L85-E

The Sure Cure® Kit SC-4L80E

    Helps cure:
  • Burnt converter
  • Bushing walks out
  • Case damage
  • Clutch failure
  • Band failure
  • Solenoid performance codes
  • Broken parts due to excessive line pressure
  • Buzzing noise
  • Metal contamination
  • Output shaft & case damage
  • High line pressure
  • Uncontrollable line rise
  • 2-3 Neutral
  • 3-4 Neutral
  • No 4th
  • 2nd Gear starts
  • Wrong gear starts
  • Converter shudder
  • TCC apply & release concerns
  • TCC slip codes
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