Car moves in neutral

[Louie L.]

Guys,
I have a rebuilt 200R4 in my street car with an issue.It was already in the car when i purchased it. It was rebuilt close to right as i have yet to break it. it does not flare and shifts right.

But when I rev the motor in park on the drive way, say over 4k the car will jerk slightly foward. Is not a whole lot but you can tell that there is something in the trans letting the car move for that second.

I know i can just stop reving it that high , but now it bothers me..

Can anyone advise what this can be? Id like to fix it before it messes anything up.

 

[QuickWrench]

Louie,

How sure are you that the linkage is set right? It could just be that simple. God knows the stock setup sucks.

 

[Yedi]

my th-350c does the same thing, in neutral or park, kinda jerks forward....dont know man, have a B&M ratchet shifter and the mechanism is set right...strange, maybe someone else knows more.

 

[Louie L.]

Well i got under there and saw nothing out of the ordinary. So i pulled the cable off with the lever arm in park. Started the car and reved with the same results ...

 

[GANGSTER]

i have a turbo 400 in my gn and it does it and my race car has a power glide does it also. ive noticed that depending on who builds them and how tight they set up the clutches some do it and some dont.