400, 425, 4L80-E, 4L85-E

Part No. 34006-05

Rear Unit Endplay, .005" Thick

Package Quantity: 10

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Sonnax now offers two solutions for excessive endplay in your GM 400/4L80-E units. The Sonnax rear unit endplay shim 34006-05 can be stacked under the four tab metal thrust washer on the rear of the output shaft flange to set unit endplay in the same manner as the OE selective three-tab spacers. These shims eliminate the need to stock expensive or hard-to-find OE three-tab spacers and are an alternative to the Sonnax shim, 34500-Z. Shimming at this location maintains the stack-up height between the gear train main shaft and sun gear shaft.

  • Shims allow for setting of rear unit endplay by shimming components at the same location as OE selective spacers
  • Can also be used between the two carriers to optimize reaction carrier endplay
  • Material: Steel
  • Inner Dia.: 2.375"
  • Thickness: 0.005"
  • Outer Dia.: 3.250"

December 23, 2015

Playing with Transmissions: Setting Total Endplay to Prevent TH400 Gear Train Failure

Randall Schroeder

Topics: Diagnostics And Theory Transmission GM 400 Transmission 4L80-E Transmission 4L85-E Transmission

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  • 34006 05