Weak points in 4l60

[Transamsfast]

Delete

[1BADAIR]

manual valve will probably slow it down. electronics shift much faster.
Give Mike Ridings a call(ridings automatics) tell him Larry sent you.
586-255-3426

[Formula Z]

not sure but ive lost 3rd and 4th a couple times. my new Performabuilt hasnt missed a lick though.

[Swat]

The 3-4 clutch pack can be weak if 8-9 fibers are used with thin steels. Sun Shell is also a weak point.