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Intermitant hard shift from 1 to 2

Has occasional hard, jolting shift from 1st to 2nd once oil is warm

Intermitant hard shift from 1 to 2

Postby MMurph [OP] » Sep 24 2013, 7:32pm

Bought a 91 Chevy Silverado 2500 with the extended cab, long bed, 4L60E and 454 engine. In the mornings it shifts really smooth but once the oil gets warm it occasionally has a hard, jolting shift from 1st to 2nd. Gonna drop the pan and change the oil anyway so whats up? Reading through the forum I'm leaning toward the 1-2 accumulator, or should I change out the solenoids while I'm in there too. Thanks in advance!!! Marty
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Re: Intermitant hard shift from 1 to 2

Postby djlove » Sep 25 2013, 8:35pm

solenoids usually are a softer shift like taking time to build pressure. I would change the fluid and maybe put in a vette servo. If you can get it fairly reasonably priced the accumulator wouldnt be bad to try since your dropping the pan anyway.

Also can you flush your system though the coolant lines? not sure how the 91's are set up.
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Re: Intermitant hard shift from 1 to 2

Postby MMurph [OP] » Sep 26 2013, 2:35am

Ooops, my bad, I'm being corrected that it is the 4l80e transmission
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Re: Intermitant hard shift from 1 to 2

Postby djlove » Sep 26 2013, 2:42am

isnt that just a heavy duty 60e?
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