Turbo 350 ?

[jlemaire1]

i just need a little advice or problem solving help.i have a 350 turbo trans in an 85 gmc and when i put it into gear i have to rev it up to get it into gear.there is no stall converter in it.i was wondering could it be the oil pump,the vacuum module.it has a new torque converter on it also,it is a stock replacement.confused and not able to figure this out any help would be greatly appreciated.

[Nytemare]

i just need a little advice or problem solving help.i have a 350 turbo trans in an 85 gmc and when i put it into gear i have to rev it up to get it into gear.there is no stall converter in it.i was wondering could it be the oil pump,the vacuum module.it has a new torque converter on it also,it is a stock replacement.confused and not able to figure this out any help would be greatly appreciated.

How's the fluid level? Low fluid would cause this.

 

Other than that...it could be one of the other two you stated.

[Zembonez]

Turbo 350 and 400 transmissions had problems over time with valves sticking in the valve body. They were pre-electronic versions.

[minibike132]

Is this just the first start after it sits. For instance if you took it for a drive, put it in park then put it in gear would it delay or would it take right off?

 

If it's the just after sitting I think the 350 had a check valve in the pump but I can't remember for sure.

[jlemaire1]

the fluid level is good and it does this even after it has been running for awhile.we changed the fluid and filter and didn't see anything out of the ordinary.do you think the pump could be the culprit or something else.

[Nytemare]

the fluid level is good and it does this even after it has been running for awhile.we changed the fluid and filter and didn't see anything out of the ordinary.do you think the pump could be the culprit or something else.

Try a new modulator valve...they're really cheap...other than that....I haven't worked on a T/H 350 in at least 5 years.