chevman24

iTrader: (1)

First off....I got this 700r4 trans from a scrap yard. So this post and the information maybe futile. Im hoping that a little help may solve my issue though.

Alright.... I Installed a transgo 2-3 reprogramming kit in this 700r4 before I tested it the way I got it. Stupid move? Yes. I also installed the kit on a bench instead of in the vehicle (which may or may not matter) Anyways....

What is happening is I have a great 1-2 shift feel, but It will not shift into 3rd. It just goes right back into 2nd.

I did some testing per the direction of Transgo. I got a 300 psi guage to read the line pressure.
It has 70-75 psi at Idle
It has 150-180 PSI If I pull the TV cable at Idle
But....When I put the car in D it only reads 75psi (should be higher)

Did I mess something up when I re-installed the Valvebody or should I expect to rebuild this transmission? (I was going to rebuild it anyways but....I was hoping I got a great deal on a good transmission.)

chevman24

iTrader: (1)

No one has had this type of issue?

krisner89

Ive seen this happen to 700r4s alot. Everytime it ends up needing rebuilt. You can try putting it in reverse and pull the tv cable in and out as fast as you can at idle for about 30 seconds. Have someone hold the brake or put a blanket between your bumper and a tree(like I did) and see if it frees up the valve. Test drive it and repeat steps if no avail. after a couple tries and it still does not shift it is no good and needs rebuilt

Some say a valve sticks and by doing this it frees them up. I tried it once and it did start shifting into 3rd and 4th for about 10 miles and then completly went out. you may get lucky but I would be prepared for it to go out at any time.

chevman24

iTrader: (1)

Thanks!!

chevman24

iTrader: (1)

Well.....Im a dumbass or I forgot how to read.
I dropped my Valvebody and shift plate this morning. I forgot to plug some holes in the shift plate that Transgo clearly stated needed to be plugged per their design. Plus....I plugged an extra hole that didnt need to be plugged.
Holes 4,5, D, F needed to be plugged...I Only plugged hole 4 and hole 2 (2 didnt need to be plugged) Now Ill put it back together and find the 3-4 clutch pack is burned up. It would be expected though for the price I paid for the trans.

Maybe they forgot that page in the instructions.

chevman24

iTrader: (1)

Well imagine that!!! I plugged all the holes that I missed the first time, I did wonder why I had so many extra plugs... and now it shifts just fine. Didnt go fast enough to see fourth though.

krisner89

cool beans. glad to see u figured it out