Dave926

Figured a new thread was needed as it deviated far from the original topic,

So an update,

Finished my trans installation/rebuild with just a small issue

Trans shifts great into every gear but second. Reverse, 1st, 3rd, 4th all shift quick and firm (on jackstands right now), but second gear just about feels like neutral. I can command second in hpt, nothing. Manual 2nd, nothing. Speed drops right off like it's in neutral when 2nd is commanded

Dropped the pan, fluid looks clean.
Checked the 2/4 servo, movement is within spec, I think 1/8th if I remember right. Replaced all the seals on it for a second time with no luck
2nd gear bushing in the valvebody was in its correct orientation per the TG instructions and the atra manual I have
Solenoids sound good, and ohm out within spec
Valves in the valvebody all move nice and free

Only issue I found in the entire reinspection process was the 3-2 control valve spring was broken in two pieces. Guess zip missed it the first time around.

I've tried to read and follow the hydraulic diagrams but I'm having a hard time understanding if the valve is out of position that it feeds oil into the band release while the trans is filling the other side of the servo trying to apply the band.

Any insight would be greatly appreciated.

performabuilt

iTrader: (25)

The 3-2 controls oil from the 3-4 clutch circuit to the 3rd accumulator I really cannot see a way it could cause any issue with second gear not being there as 2nd gear oil does not interact with the circuit from what I see it could only effect 3dr gear apply and release or vent the oil for 3-4 if missing or way out of place perhaps? The Band release circuit is only on when 3-4 clutch oil is available which would only be in commanded 3rd gear.
This diagram shows all the places 2nd oil is when in second gear.
I am assuming you have air applied the 2nd and 4th servos ?via the case.
If you have when it is back together on lift in drive command second can you with a pry bar push the servo cap in pretty easily if you cannot something is wrong your not getting 2nd clutch oil to the servo which points back to the 1-2 shift valve , 1-2 accumulator etc.
But I would certainly start by air testing via hole in case the 2nd servo and visually observe band apply
What's really a bit perplexing is when you say you command second the speed drops off because for that to happen you would have to lose forward clutch apply.

http://ww2.justanswer.com/uploads/GG..._110618095.jpg

Dave926

I’ll be honest and say I did not aircheck the 2/4 servo, wasn’t really sure or though of a way to do it honestly. Did aircheck other stuff of course, and the 3rd accum Check ball doesn’t leak at all

performabuilt

iTrader: (25)

"


The hole circled in black you can check 2nd servo and band apply with air in that position

Dave926

I should probably add that the reason I thought the broken 3-2 control valve spring was an issue is it leaking oil into the 3rd accumulator while the trans is trying to fill the 2nd accumulator

performabuilt

iTrader: (25)

The only issue with that is as you can see no 3-4 oil is in that area to leak when in second.

Dave926

Update

airchecked the band last night, looked great. No excessive band wiggle either

started installing the valvebody again last night, was going to torque it down today but it’s raining out

Dave926

New update

Everything back together, still couldn’t feel 2nd engage when commanded on jackstands. Command 1st no throttle, 25mph. Command 2nd, drops to 20, command 3rd jumps to 35, and 4th over 40

Decided I’m just going to send it, put it on the ground and drive it down the street. Every gear engages perfect, going to road test a little more this week.

Any insight or my means of testing halfass and incorrect?

performabuilt

iTrader: (25)

It can be hard to tell when second engages in a no load environment , One way to tell is to place in manual 1 then command second unless it has a transgo or other kit in it to force manual low hold it should jump to second and when commanded back jump back to 1st . I had not realized you had not actually driven it .

Deniz A

Did you changed your valve body seperator plate?