If anybody has a car up on stands or an assembled rear end, if you would be kind enough to take some measurments for me. It has to be a 12 bolt with ford ends and a roller bearing. Same for the ford 9". What I need is an axle end play measurment with a dial indicator. I want to compare numbers.
I just measured mine today 0.005" runout on the mounting flange both sides. Also just got off the phone with Moser and according to the tech up to 0.008" was within spec
Reason I measured is I'm seeing a slight rubbing on my rear calipers as I rotate them. If add the rotors into the mix the runout jumps to about 0.010" to 0.015" runout. Thinking about having the rotor's machined on the car to true them to compensate.
Actually talking about end play not runout. In and Out. The amount the roller bearing allows the axle to move. That is causing my pad knock back. I want to compare to some buddies to see if mine is par for the course. There are quite a few of us that are experiencing pad knock back with Ford 9" and Moser 12 bolts with big ford ends. I mean pretty popular cars on the boards. It doesn't cause any major problem until you take it to the track. Like to hear what you have Ed.
I was just looking at the housing end and began wondering where the slack could be coming from. The ford end retains the axle by capturing the bearing within the housing end. If you have play in the system it can only be coming from three possible locations; internal to the bearing, between the bearing and axle, or between the bearing and housing. Due to the extremely tight fit of the bearing and axle, we can be relatively certain it's not coming from there. One would hope that the bearings don't have enough lateral play to cause pad knock. That leaves extra space in the axle end as my logical first place to look.
It could be possible that there's extra "slack" space next to your bearing, when your retainer is bolted down. If this truly is the case, I would imagine one could fab up a shim to be sandwiched in your housing end along side your bearing. Very similar to how you would shim a carrier when setting up a set of gears.
This isn't anything I've measured as of yet. I'm just throwing out ideas.
Do you happen to know which ford ends you have? I have heard that Moser does actually sell a few different types. Some which leave the bearing ends slightly outside the housing end (standard ford), and others that leave the bearing flush to the surface.
I actually figured it out while you were posting. I'll post a video on it in a few. You are right on the money. Thanks for getting my brain going. I figured out that I have .020 clearance between my outside race and retaining plate. Imagine me thinking Wilwood and Moser could actually get together and make something work. LOL You can see it on my computer but not so much on youtube after it's compressed. Thought I did a decent job of explaining.
Todd, I know that Currie offers Wilwood specific retainers as seen here, although I'm not sure how much lip they have. Could be worth a call. Otherwise, a shim would do it but without it being located by a plate with holes for the retainer bolts, locating it during assembly could be somewhat difficult. It's thin enough that getting it to stay in place could be tough.
Good call Tobin....I'll see if they have one that doesn't require me to press my bearings off. If not this may still be the way to go. I was thinking of using some bearing grease to hold the shim but it would be a pain for sure. I love the description about the wilwood retainers being junk. I agree!
Brian Hobaugh SCCA National Tour June 2014
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Moser 12 bolt and Ford 9" help
I'll see if I can measure endplay tomorrow.
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