4l60e 1-2 shift accumulator help

[GrayT]

hello,

1996 vortec 5.7 and 4l60e swaped into 85 squarebody

from a stop it feels like the trans is slipping? or hesitating then mabey shifting back and forth between first and second gear very quickly or a hard shift from first and second. all other gears shift normally and if I manually shift it from first to second its fine.

I thought it might be the 1-2 shift accumulator so I dropped the pan and pulled it. Should the piston come out of the housing? I can hear rattling if i shake it but i cant see the spring or get the piston out of the housing

any thought or advice appreciated,
thanks

 

[NickG80]

Use air to blow it out, possibly the spring broke. It’s not uncommon.

 

[GrayT]

I used air to blow it out and both springs were intact, everything looked brand new. I went to the junkyard and got another accumulator out of a wrecked truck and installed it and all the problems went away. Comparatively the piston of the bad one felt a lot stiffer and tighter in the bore but I could still press it down with my fingers and it returned to the up position. I guess since they are so cheap its just worth it to replace if any symptoms come up.

 

[L31MaxExpress]

I used air to blow it out and both springs were intact, everything looked brand new. I went to the junkyard and got another accumulator out of a wrecked truck and installed it and all the problems went away. Comparatively the piston of the bad one felt a lot stiffer and tighter in the bore but I could still press it down with my fingers and it returned to the up position. I guess since they are so cheap its just worth it to replace if any symptoms come up.

The plastic pistons are junk. Grab a metal one from a 700R4 if you ever have to go back into it. Was the plastic piston cracked?

 

[NickG80]

The plastic pistons are junk. Grab a metal one from a 700R4 if you ever have to go back into it. Was the plastic piston cracked?

Oh good call I forgot about the plastic ones.