Clutch issues on manual swap

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ferretpatrol

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We have an nv3500 we're trying to swap into a truck (94 tbi) in place of a 4l60e. We're having master cylinder and clutch disengagement issues. Essentially the pedal is super stiff to the point where the firewall is trying to flex, and we're getting a little but not much movement on the clutch disk. Not disengaging at all. Has a new concentric slave/throw out bearing, new clutch disk, new master cylinder. Tranny came out of a 98. Thanks
 

bluex

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Did you use a pressure plate for a 98 or the 94?

The earlier trans (like would have been in a 94) with external slave use a different height on the pressure plate fingers. If you use that 95 an older pressure plate with the 96+ internal slave the clutch is always disengaged as the fingers are about 1/2" higher than a 96+ one.

I found this out the hard way also :doh2:
 

WICruiser-97

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Is the stiff pedal from the up position or only after being depressed some amount?

If stiff from the up position the slave is locked up preventing the piston from moving.
 
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