Help - Help - Transmission!!
Thread Starter
Instructor
Joined: Feb 2006
Posts: 119
Likes: 0
From: Atlanta GA
Help - Help - Transmission!!
Help!!! I just had my motor rebuilt with a refreshed transmission. I had a TH400 core that was completely rebuilt, shift kit, new torque converter, etc....
The transmission will not go into reverse - forward only!!!! Argh...
Any suggestions/thoughts? The machine shop that did the rebuild does not really specialize in transmissions at all and will not take any responsibility since I provided the rebuilt tranny.
The transmission will not go into reverse - forward only!!!! Argh...
Any suggestions/thoughts? The machine shop that did the rebuild does not really specialize in transmissions at all and will not take any responsibility since I provided the rebuilt tranny.
Drifting
Joined: Jun 2005
Posts: 1,523
Likes: 1
From: grand prairie texas
Do you have park? What I mean is when you put the selector into the park position that it locks up the rear wheels? If not you may have to pull the oil pan back off and check to see if the linkage that connects to the rod in the valve body is hooked up. Good luck
Thread Starter
Instructor
Joined: Feb 2006
Posts: 119
Likes: 0
From: Atlanta GA
Yes - It totally catches park and on the test drive it went through the dears fine, shifted up and down okay but no reverse. Maybe not as bad as I thought but still freaked out. Maybe some type of linkage?
Thread Starter
Instructor
Joined: Feb 2006
Posts: 119
Likes: 0
From: Atlanta GA
Okay....so I tested the car myself today and the tranny totally catches in park gear - it totally locked and nothing moved. However, when I pull back on the automatic it goes directly to nuetral (skipping reverse) and then directly into forward gears. The car runs great through all the forward gears, shifting up and down automatically and very good - BUT NO REVERSE.
What gives??? Is this sounding like a easy fix or is the tranny gonna have to come out again for a rebuid? It was just rebitly but somethings wrong. Ugh!
What gives??? Is this sounding like a easy fix or is the tranny gonna have to come out again for a rebuid? It was just rebitly but somethings wrong. Ugh!
Drifting
Joined: Jun 2005
Posts: 1,523
Likes: 1
From: grand prairie texas
I am not exatcly how the reverse gear operates but there probably is a problem in your transmission valve body porting pressure to the reverse bands. The valve body is fully accessable with the transmission in the car by dropping the oil pan. I would of thought by now that someone with lots of knowlede of the th44 would of chimed in. Usually it is a rock solid transmission.Do you have any family owned transmission shops in your area that you could ask and get some free professional info? Good luck
Instructor
Joined: Mar 2003
Posts: 217
Likes: 1
From: Buffalo MO
If memory serves me correct, reverse is applied by a band that is opperated by a servo. The bands pivot point is a pair of lugs that can be seen from the outside of the case on one end, and a pin that attached to the servo on the other end. The servo is located under a 6 bolt cover, and just to the side and partially under the valve body. It is sealed to the case by a thin steel gasket.
There is a possibility that the bolts on the servo cover are not tight, thus not allowing the servo to build pressure.
If you drop the pan, the servo cover is easily identified. (stamped steel)
just a thought-
good luck-
bk
There is a possibility that the bolts on the servo cover are not tight, thus not allowing the servo to build pressure.
If you drop the pan, the servo cover is easily identified. (stamped steel)
just a thought-
good luck-
bk
