700R4 Tranny Problem After Rebuild

[tburkdoll]

One of my buddies just rebuilt his 700r4 and has ran into a few issues. Thought i could get some insight from members on here.

 

 

I'm reposting his post from another site:

 

After rebuilding my transmission, using a tci pro super rebuild kit (1985 700r4 by the way) i seem to be running into some issues. I have the transmissions on a dyno right now, so i have not put it back in the car yet. The only electronics on the trans are for torque converter lockup.

 

I having a "second gear start", and the trans will not downshift or upshift. The only way to get another gear is to shift down to manual Lo. I do have reverse.

 

on top of that, Line pressure is about 115 psi in second gear, and 145-160 in manual Lo and reverse, all at about 800 rpm.

 

lastly (for the problems) I have no pressure going to my pressure taps, for 2nd, 3rd, and 4th gear pressures. Before reinstalling the checkballs which were removed for the shift kit (i was having the same basic issues so i returned the transmission to factory style for diagnosing purposes) I had the same issues, but i DID get 2nd gear pressure at about 780rpm, which is weird because 2nd gear would not slip at all at 700 rpm when 2nd gear pressure was at 0.

 

It is not slipping in any gear, and all the checkballs are in the right place ( I am not sure about checkball #8, which is not located anywhere in the diagrams i have seen) I know i have everything torqued correctly and the gaskets are in the right place. I do have great fluid flow with no bubbles or irregularities.

 

If anybody has any ideas, or if you can point me in the right direction, let me know. I have had this thing on and off the dyno about 4 times now, and I am getting quite frustrated. I have attached the fluid diagrams which include manual 1st and 1st in drive (because i only get manual first and not 1st in drive).

 

Here is the link for diagrams... http://www.thirdgen.org/techboard/transmissions-drivetrain/634918-after-rebuild-i-only.html

Edited December 3, 2011 by SweetSS24 (see edit history)