spy2520

iTrader: (3)

on a 4l60e. When put in reverse it feels like the brakes are on, car still moves in reverse. But it needs a little "help". Any other symptoms to this? And if the forwards are holding in reverse that must mean the reverse clutches are getting pretty tore up too right?

performabuilt

iTrader: (25)

Yes it will damage the low reverse and reverse inout clutches if you keep trying to go in reverse like that. does it also try to move forward in neutral and park?

spy2520

iTrader: (3)

not that i have noticed. You've seen my other thread though, do you think a pressure issue could cause the forward clutches to hold in reverse, but not actually be seized?

I had already mentioned that reverse was weak, and it all of a sudden became almost impossible to back up, so i'm thinking that this has been the problem since the trans went in, and reverse finally lost the fight.

performabuilt

iTrader: (25)

Well if the forward clutces are seized you would try and pull forward in neutral would feel like 1st gear, Now a bind up in reverse could be a crossleak in the valve body or pump . Low line it self would not cause that, I would check and make sure it does not try and go forward in NEUTRAL for sure

spy2520

iTrader: (3)

just double and triple checked it does not go forward in neutral or park, even if i give it some gas, it does not move forward at all in neutral o park. But it definitely feels like the brakes are on in reverse.

And i did notice something odd when installing that i guess i didnt pay much attention to, but when tightening the bolts on the u-joint, i could only turn the driveshaft one way by hand with the car in the air, but i did put it through all gear positions in the air when the installation was done and everything seemed normal at that point, of course there was no load though.

Anyway, i'm not gonna have a 4L60e manual with me, but i'm gonna pull the pan and check out the valve body at work today and hopefully there will be something noticeable.

spy2520

iTrader: (3)

Ok, i got bad news. The fluid i just put in on tuesday is definitely full of clutch material. I think i saw some shiny **** in there too. And i checked on the lift, guess what happens when i put it in neutral? the ****** wheels spin as if its in first gear.

It makes perfect sense i guess, i have a 4000 stall converter, so it would take a little more effort for the car to want to roll forward when its on the ground. Being that the converter is so loose, i shouldnt be able to feel the car pulling a little in neutral. But in the air it does, so i guess it is the forward clutches.

I think i'm gonna rebuild the other trans in my spare time, so i guess i need to call and get some parts soon.

performabuilt

iTrader: (25)

Just saw you said that the drive shaft would only turn one way and that would explain every thing , The 2-4 band clearance was too tight this would cause all the symptoms you mentioned.Good luck on your try again and if you need any advice feel free to holler.

spy2520

iTrader: (3)

really? i never would have guessed that judging by how the 1-2 shift felt. And the band cant be adjusted externally like those older ones i guess.

spy2520

iTrader: (3)

And i couldnt find anything in the valve body that looked out of place as far as i could remember how the 4l60e valve bodies were supposed to look. All valves moved as they should, and all the springs were in there to the best of my knowledge. I would have liked to know exactly how the vacuum modulator was supposed to be on there though.

performabuilt

iTrader: (25)

No it can be ajusted with shims and with pin length, But it being burned, would explain the bind up in reverse. Its either to tight or theres some hydraulic leak thats turning it on in reverse.

spy2520

iTrader: (3)

ah i see. Well i cant wait to take it apart and see how a $2 part could have saved a $2300 transmission lol.

performabuilt

iTrader: (25)

Keep us posted ,

spy2520

iTrader: (3)

i will, you'll probably see the inside of the other trans first though. Burned 3-4 clutches, nothing interesting.

spy2520

iTrader: (3)

i got one last question for you. If the trans has no fluid the possibility of a hydraulic issue applying the 2-4 band isnt very likely right? i wonder if its worth trying to mess with the servo in the mean time.

performabuilt

iTrader: (25)

That would be correct