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Old 05-17-2021, 12:51 PM   #5
Dean Feiock
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Join Date: Aug 2002
Location: Pierre, SD
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Default Re: Transmission Blues

Outside of a leak in the direct clutch circuit, clutch timing is the biggest issue with repeat direct clutch issues.

Turbo Action valve bodies feed the second gear servo apply side in both 2nd and 3rd. When shifting from 2nd to 3rd, the direct clutch oil must work against the intermediate servo pressure and push the servo back off, all while it's pushing the direct clutch on. If the timing is off, the band wins since it's already applied and burns the direct clutches. I've seen this actually lock the wheels when the transmission shifts from 2nd to 3rd or 3rd to 2nd.
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