trans question?

[splinter]

when i start my truck in the morning , my truck will jump forward against the parking lock! it is a fast hard lunge forward with no niose.[ 97 5.4 auto trans ]i was wondering if anyone else has ever seen this . it does not matter if the truck is pionted up hill or on level ground it will still lunge forward. and no i am not emaging this! it moves 4 to 6 inches. thanks for the help!

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[usedtodrivechev]

im no genious but i know if you dont put the clutch in all the way in manuals it can jump forward....so in an automatic i would think it would have to do with the torque converter...as if it was stuck or something...

I dont know excatly what to tell though.

[Lt_Dusty]

Do you live in a cold climate? If so, and it only does it when the transmission is cold, then I don't think it should be of concern. My 97 will do that ocassionally too, now that the temp has dropped below freezing.

[dirtyd0g]

The torque converter has nothing to do with it when you are in park. I would say it is an issue in the forward clutches being a little tight. Maybe you heated them up and got the plates a little warped in there which tightened up clearances.
Alan

[splinter]

thanks for the input, sorry it took so long to reply had to work over and couldn`t get to the computer to check reply`s. i live in lower middle tennessee. its just now getting cold and it even did it in july. temp doesn`t seem to make a differance. i guess its not hurt nothing i hope,it just catches you off guard when the darn thing jumps forward .