mike

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I work at my local parts store and had a guy come in today working on a 98 1
Ton Cummins truck.

He had broken his slave cylinder and needed a new one, only our 2004 Wagner
Books show the last year available to be the 94-97 group for a diesel.

I ordered it in to take a look at it. Everything from 97 on back all show a
Slave with a 1" Bore.

His 98 that he brought in measures at 20mm. Other than the bore size they
both had the same mounting points and rod length.

He went ahead and took it and was going to try and make it work, as he said
Dodge would only sell him as a complete kit - Cl. MC/SC combo for $250.

Only thing he and I could think of is there may not be enough force/pressure
to fully release the clutch.....I remember the discussions faintly in here
about different bore sizes of the Brake MC and their effects on the pedal
feel and braking....I assume somewhat that this is true of the clutch setup
as well.

Just wondering if we were correct in thinking the larger bore Slave might
work...

Thanks,
Mike

tbone

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A large bore slave cylinder will be able to apply more pressure but because
of the larger bore, there may not be enough travel to fully release the
clutch.

--
If at first you don't succeed, you're not cut out for skydiving

bryan swadener

The larger bore master cylinder will cause an increase in pedal effort, and
provide more stroke in the slave cylinder. Going from 20mm to 1" (25.4mm) I
don't know how much more. The main concern would be too much slave cylinder
travel -- possibly causing the release levers (if a Borg & Beck cover) in
the clutch cover to contact the disc, or (if a diaphragm cover)
over-centering the diaphragm.
Bryan

tbone

While all of this is true, he was talking about the slave cylinder.

--
If at first you don't succeed, you're not cut out for skydiving

bryan swadener

Doh!