42RLE buzzing noise on initial engagement - Transmission Digest

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42RLE buzzing noise on initial engagement

Wayne Colonna
By Wayne Colonna

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.

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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.

Read more articles in our Transmission Tech/Talk series here.

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