well yesterday i swaped out my brothers auto trans since his old trans 1st 2nd gear friction plats disintegrated and made the trans fluid to yummy looking choco smoothy. so we whent to the junk yard and pulled a trans from a blown engine max (water in oil) and to our luck the trans was recently rebuilt (very clean and still spray painted) .. well the trans works grate and shift and locks hard but now thier is a issue of the car cutting off or stutters and drops rpms bad and then normalizes when we shift it into gear, but mostly cuts off. to mee it feels like the trans/tq converter doesn't want to let go of the gear so it cuts off almost like if the car was stick and braking while in gear .... any one with info on this issue would be nice thanx ... (ima drain some fluid out since i think we put like a 1qt or 2qt more of trans fluid)

 

I experienced it. And I think it's because of the throttle body need cleaning? It was so long ago. I forgot. But it helps to let the car idle for a while before putting it in gear.

 

the thing is the car never did the shut off thing before only till we swapped out the tranny

 

Check the fluid. Is it auto or stick?

 

its auto and had to remove some oil since over filled by 1qt..

 

I didn't get what you mean by "normalizes when we shift it into gear, but mostly cuts off". Is it a every gear R, D, 1, and 2?

Does your car has low idle? Losing power?

 

what I mean is that the car shuts off most of the time when put into an gear and the lucky moments the car stays on the rpm drops drasticly like it wants to turn off and then rough idles at 600 when the car is in gear... the car never did that only after the tranny swap. he car nomaly idles at around 700-800 smoothly .. thier is no loss of power when the car stays on and u press the gass to go it picks up and shifts grate but when comeing to a stop it stutters like it want to cut off or cuts off complitly (like if i wher braking while the car was in gear in a stick shift car)

 

Sounds like a TC issue (did you re-use the old box' TC on the new trans?)

If not then either the box itself or the TC is to blame.

Had exactly the same experience few years ago caused by dirty/old ATF - drained and replaced ATF twice and she's still going fine at 310K km

FSM's fault-finding procedures (AT44) - what's the results?

 

used the old torque converter since the old trans literally chewed up the friction plate from 1st to 2nd and when it was able to shift to 3rd it ran fine .. saw chunks of friction matiral in the dip stick .. but yeah ima try reflushing the oil out once again.... if any other idieas i would like to hear them thanx ...

 

Well - thats a no-no IMO ................. the "chunks" in the old box mixed also with the TC fluid (about 1/3 of the box's capacity) ..............any chunks in the old TC's fluid is now undoubtedly also in the new box because the TC managed to mix it real well with the new box's "clean" fluid

No way to flush and clean a TC in situ ................ you need to replace and hope for the best on the box then after a flush

 

oh ok .. drained the old tc the best i could .. ima re flush the trans in hopes that is cleans out and wish for the best ... thanx