Rebuilt autobox flaring on 2nd-3rd change when cold (722.3 I think )

[tjamesbo]

after a long sob story of fitting a 2nd hand box to my 1994 320TE and finding it faulty i got the box rebuilt ./ reconditioned by a local transmission specialist however the box is flaring ( some 500 rpm , more if your foot is down a bit ) when the car is cold ( transmission specifically ) for about 10-15 minutes when its hot everything changes fine and there is no flaring
the rebuild guy / firm wants to put some additive in it, which I'm dubious of, i have heard something about the K1 and K2 springs which can cause flaring and stops if they are replaced K2 I think is the 2nd to 3rd one ? not sure if this is external to the box or internal anyone any in depth knowledge of this when hot the box does not flare 2nd to 3rd at all even under foot to the floor acceleration through all gears

 

[ray_hennig]

after a long sob story of fitting a 2nd hand box to my 1994 320TE and finding it faulty i got the box rebuilt ./ reconditioned by a local transmission specialist however the box is flaring ( some 500 rpm , more if your foot is down a bit ) when the car is cold ( transmission specifically ) for about 10-15 minutes when its hot everything changes fine and there is no flaring
the rebuild guy / firm wants to put some additive in it, which I'm dubious of, i have heard something about the K1 and K2 springs which can cause flaring and stops if they are replaced K2 I think is the 2nd to 3rd one ? not sure if this is external to the box or internal anyone any in depth knowledge of this when hot the box does not flare 2nd to 3rd at all even under foot to the floor acceleration through all gears

I really don't think the repair guy should be suggesting additives. I have the 722.5 box (based on the 722.3) and it was rebuilt by recommended specialists in transmissions. No issues as the job was done properly.

I would challenge them.

Good luck.

RayH

 

[John757]

The 722.3 has a vacuum pipe from the autobox to a shift modulator on the side of the engine intake manifold ( green plastic cube I think) check the pipe is connected and is not perished. This can affect the shifts.

 

[philnewmerc]

It may sound obvious but these boxes can be very sensitive to level, slightly low and it will slip, especially when cold - check the level