42RLE buzzing noise on initial engagement - Transmission Digest

42RLE buzzing noise on initial engagement

The complaint

A 2005 Jeep Wrangler equipped with the 42RLE transmission had a buzzing noise when the shift selector was moved to the drive position. The vehicle was actually brought in with a shift complaint, at which time the owner of the vehicle also said that the buzzing noise was present since he purchased the vehicle three years ago.

The cause

The underdrive and overdrive accumulators were installed upside down, they were installed springs in first, then pistons as seen in figure 1 (above left).

The correction

The underdrive and overdrive accumulators were installed in the correct direction which is pistons in first, and then the springs as seen in figure 2 (above right), which eliminated the buzzing noise.

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