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

Rear Unit Endplay Shim
Part No. 34006-05

.005" Thick

Package Quantity: 10

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Sonnax offers two solutions for excessive endplay in GM 400, 425, 4L80-E and 4L85-E units. 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 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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