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Author Topic:   rear disc brakes?
steamatic racer
posted April 03, 2002 12:58 PM
Just bought the WILWOOD rear-disc kit. I have the big 9" (5 on 5 1/2). The hats that came w/ the kit are too small to fit over the axle flanges & the hats have 3 different bolt patterns, the biggest being 5". Whats the solution?? thanks#75

posted April 03, 2002 01:27 PM
If you think the hats are a problem, wait til ya gotta get wheels. Best thing to do is redrill the axles or get another setup. I realize that isnt what you wanted to hear after spending the money on brakes. If the axles are to be redrilled make certian the guy knows what he is doing, like yours is the 37th one hes' done, not the first.

posted April 03, 2002 03:32 PM
I had the exact same problem, pretty frustrating. I had already redrilled the flanges to a 4.75 bolt circle, so I had a ton of room to cut dow the flanges.

The three patterns on the hats are 4.5, 4.75 and 5". If you running a GM, you're probably gonna want to use the 4.75, but you might want to upgrade to 5". In which case you can use older 12" Impala spindles and rotors which are 5 on 5". But you have to remeber what calipers you're using on the rear. You want to keep all four the same. Personally, I'm using 11.75 rotors (newer Impala stock 5 on 4.75 on front) with Impala calipers on all four corners. None of this matters to you if you don't have a GM.

Luckly, I know someone with a lathe, so we cut the flanges down until they fit into the hats. Either do that (a machine shop should be able to do it easily) or get another rearend with smaller flanges. Problem is the car rearends are usually 28 spline, your truck rear is probably 31 which is a little better.

Here's another problem I had that you might too -- the brackets for the calipers are for a 3" housing, your housing might be 3.25" like mine.

Good luck, and remember, nothing's easy on a stock car.

posted April 03, 2002 08:32 PM
What size is you rearend? I have 2 axles out of a 60 in. rearend 28 spline with racing studs if they will be of any help to you let me know.

posted April 04, 2002 07:09 AM
THANKS alot guy's, This is my 2nd year in this class, bought a roller added a engine,tranny,gear set-up & started learning. Ran a few years in a 2-man rearwheel cruiser, but nothing compare to this class. Sure glade I found this forum. THANKS#75

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