Low reverse servo r&r in vehicle

[hoover]

I'm installing a shift kit in a 727 in the vehicle and there is a spring change in the servo. Ive done it on a bench with the tailshaft housing removed, but i don't see a good way to do it without tearing stuff apart.

Anybody have way of doing this?
Should I just leave the stock spring in it?

 

[plymouth67]

Do not leave the stock spring in it. If your shifting it manually at any time it will not release the band fast enough and act like its locking up for a second (because it kind of is). It's not too bad of a job to do in the car, the worst part is getting the F$%#@^& snap in the extension housing back on. In the car that snap right likes to slip down a little and makes it kind of a booger to get back on. A lot easier if you have access to a lift.