lockup converter

[Mr. Don]

1995 yukon 5.7. The torque converter is not locking up. Changed fluid and filter, had the transmission flushed but still won't lock-up. Any solution's?

[GM-Tech]

Sure, there are solutions, but you need to do a little diagnosis. Could be as simple as a brake switch or you may need to go into the tranny. I can't really guess at what the problem is.

[XR Man]

1995 yukon 5.7.  The torque converter is not locking up.  Changed fluid and filter, had the transmission flushed but still won't lock-up.  Any solution's?

 

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I had a 94 K1500 that would not lock up. 1,700 later it was good as new. They said it was a bad pump. Completely rebuilt the tranny, I had them put in a $250+ new tourque converter even though they said the old one was probably fine. I did not want to have to go back in.