Question about 1999 GMC Jimmy

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The Jimmy surges when it gets into overdrive like it is going from 4th to overdrive again and again. Could this be the torque converter?

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Overdrive problems are common with GMC Jimmy/ Chevy Blazers. The overdrive is failing. The vehicle can be driven in 3rd gear until the problem can be addressed. If you think it's the torque converter clutch, then see if you can locate a square four wire plug on the side of the transmission. Disconnect this plug and go for a drive. If the problem goes away, then the clutch is bad. The vehicle can be driven like this until the problem can be addressed. You will notice a decrease in fuel economy.

Posted on May 18, 2011

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Yes it could be, try driving in 3rd gear and see if it still does it.
tcc still works in 3rd.
when was last full tuneup?

Posted on May 18, 2011


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