I haven't been on this thread for a while, so I scanned back through the posts. After seeing the picture of the worn clutch drum, I wonder what your piston looked like. Are you sure it wasn't worn and causing leakage from the seals? Also, did you replace the metal sealing rings on the back of the drum where it fits into the clutch housing? The bushing/sleeve that the sealing rings seal against often gets worn and needs to be replaced. New sealing rings won't seat on an irregular surface. REference items 1 & 2a or 2b in diagram. Also be sure to check the forward/reverse linkage to be sure it is shifting fully into forward.
Thanks for the reply
I did check the piston and it wasn't worn and looked good' I did change the rubber seals on the piston and changed the metal sealing rings on the back of the Drum but I did not change the bushing I thought it looked ok. I did check the forward/reverse linkage to make sure the pins in the linkage are ok and it does shift fully into forward. I disconnected the linkage and tried it by hand and no difference it was ok.
If the bushing/sleeve was worn and I did not see it would that make it loss pressure for my forward clutch or is it more the piston.
Thanks again for your reply and help