Brake Dilemma

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Jul 12, 2007 | 11:16 AM

#31

empiretc

Lead Driver

Joined: Dec 2003

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Quote:

Originally Posted by DSSinc

I took my new M/C NAPA p/n 47-39634 and had them give me a new, not rebuilt, p/n 47-39635 M/C.

What is the difference of the two? The "new" mc we just put in from napa is the 39634. its a 350 drw. When we called napa to ask about the 39635, they said that was for non-drw non-diesel trucks.

Jul 12, 2007 | 10:13 PM

#32

catfish101

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Joined: Mar 2005

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From: KY

I would say that there is a volumn difference in the cylinder because the drw truck should have a larger bore in the wheel cylinder. Probably an inch and 3/16 compared to a one and 1/8 on a single cylinder. Just a guess. I am not a parts guy but I have put alot of parts on.