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Ford Truck Enthusiasts Forums (https://www.ford-trucks.com/forums/index.php)
-   Pre-Power Stroke Diesel (7.3L IDI & 6.9L) (https://www.ford-trucks.com/forums/forum117/)
-   -   Brake Dilemma (https://www.ford-trucks.com/forums/559273-brake-dilemma.html)

empiretc 07-12-2007 11:16 AM
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.

catfish101 07-12-2007 10:13 PM
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.


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