Moser 12 bolt and Ford 9" help - Lateral-g Forums

Vegas69 · #1 05-21-2009, 01:47 PM

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.

BBC69Camaro · #2 05-21-2009, 02:28 PM

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.

Vegas69 · #3 05-21-2009, 02:50 PM

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.

Rhino · #4 05-21-2009, 03:03 PM

Do you happen to know if the play is in the bearing or the end? If it's the end, you should be able to shim it to your liking.

I'm interested in seeing how this works out. My rear isn't in the car yet, but I'll be following closely.

BBC69Camaro · #5 05-21-2009, 04:34 PM

Quote:

Originally Posted by Vegas69

Actually talking about end play not runout.

Oops sorry Todd misread. I had runout in my mind all day today.

I'll see if I can measure endplay tomorrow.

Vegas69 · #6 05-21-2009, 07:21 PM

Quote:

Originally Posted by Rhino

Do you happen to know if the play is in the bearing or the end? If it's the end, you should be able to shim it to your liking.

I'm interested in seeing how this works out. My rear isn't in the car yet, but I'll be following closely.

Please elaborate. It's a new moser with about 2200 miles.

Rhino · #7 05-21-2009, 08:45 PM

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.

Also, what brakes are you currently using?