Forward Clutch: Wave Springs and Backing Plate travel

[Blown&Injected]

The measurement for the backing plate to snap ring is greater than the ASTG says it should be in my Forward Clutch Assembly Housing. Upon removing the clutch pack I found that there is only one wave spring and the guide says there should be two???

The trans rebuild procedures on the GNT-Type site says only one wave spring.

What's going on here?

Thanks,

 

[Lee Thompson]

wave spring

I/m by no means an expert on these, but I believe if the forward drum has the aluminum piston it take 2 waves (1 at the top and 1 at the bottom of the stack) A steel ring piston takes 1 wave. BTW what clearance # does your book ask for?

 

[Blown&Injected]

Hi Lee:

I am looking at the ASTG (Although I have been getting advice on where and how to set the end play on the board.)

The ASTG says to put 20 pounds of even pressure on the backing plate to compress the wave plates. Then measure the space between the backing plate and the snap ring. Should be .030 to .050"

The piston in my trans is steel and there was only one wave at the bottom of the stack. But there was over .060" of slop in that pack, it really seemed like it needed another wave plate. I was hoping the clutches were worn badly because that might account for the extra space, but the friction material looked near new???

Thanks,

 

[Blown&Injected]

Could the steel piston also be the reason there is a clutch apply ring on the piston, and the ASTG, which shows two wave plates, is NOT showing a clutch apply ring

 

[chris718]

here is the stack up.wave steel ,friction ,flat steel ,friction ,flat steel ,friction,flat steel ,friction,and pressure plate.if the pack is too loose use direct steels in place of the forwards until you arrive at .010 to .020 inch. forget the pressure test .remember that at .010 to .020 you still have the extra compression of the wave spring to ensure proper amount of oil is accumulated behind the piston for proper clamping loads.