not sure what the heck i was lookin at last time??
9" inch specs
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Senior User
Joined: Jul 2004
Posts: 139
Likes: 0
From: Ringwood NJ
9" inch specs
Im rebuilding a 9" and im up to setting up the center section, i printed out the tech article and i undestand the process. My question is does anyine have/ know the spec torque specs, pinion preload specs and backlash specs, I do not have a service manual that contains the 9". Thanx for any info or help
Postmaster
Joined: Apr 2004
Posts: 3,005
Likes: 2
From: Santa Clarita
Postmaster
Joined: Aug 2003
Posts: 4,172
Likes: 1
From: Oakdale,Ca.
I just rebuilt a 9-inch a few months ago and did loko through the FTE article, but there were some things in it I think were wrong...IIRC, it listed new bearing preload less than old bearings, every other rear I've was opposite...i/e more preload on new bearings.
Also, I think the backlash spec given was incorrect too.
FWIW, I set mine up (new bearings) for 12 in/lbs on the pinion, and .005 on backlash, I forget the numbers I used for carrier preload, but what I did was assume that after things wee set up, I need .005 on both side, so I took my thread gauge and measured the TPI's for the adjusters, and did some quasi-calcs to come up with how much further to rotate the adjusting "nuts" on the carrier bearings. I could measure a spare adjusting nut again, if you need the info.
Also, I think the backlash spec given was incorrect too.
FWIW, I set mine up (new bearings) for 12 in/lbs on the pinion, and .005 on backlash, I forget the numbers I used for carrier preload, but what I did was assume that after things wee set up, I need .005 on both side, so I took my thread gauge and measured the TPI's for the adjusters, and did some quasi-calcs to come up with how much further to rotate the adjusting "nuts" on the carrier bearings. I could measure a spare adjusting nut again, if you need the info.
Postmaster
Joined: Apr 2004
Posts: 3,005
Likes: 2
From: Santa Clarita
I'm all for doing your own rear end gears. I did a set a while back and as careful as I thought I was putting it together, something went wrong after a few weeks of driving. My last rear end gears I bought a different ring and pinion for it. This time I took it to the rearend shop and they put it together for me for about $100. Sometimes, it's not worth messing with it. For the $100 I put in, I saved time and having to take it all apart again. If you feel confident in how to do it. I say go for it. If your not sure, and want to experiment in putting one together. I'd suggest doing it with someone who has prior experience putting them together. Just in case!... Good luck.
Fleet Owner
Joined: Jul 2004
Posts: 27,287
Likes: 1,052
From: NM
Originally Posted by imlowr2
For the $100 I put in, I saved time and having to take it all apart again.
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Cargo Master
Joined: Apr 2007
Posts: 2,063
Likes: 38
From: Valley Center, California
This is a great source for Rear End Tech. 9"/Dana/12 Bolt etc. It's well done and the best part is you can always back up and look it over again if you don 't get it the first time.
I can't recall what I paid, but it wasn't too bad
www.technicalvideos.com
Part# 16-1600
715-552-8016
I can't recall what I paid, but it wasn't too bad
www.technicalvideos.com
Part# 16-1600
715-552-8016
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Elder User
Joined: Jul 2002
Posts: 520
Likes: 0
From: Wellington, CO
Well, it's time for my usual plug for Ken Collins how to DVD's
http://badshoeproductions.com/
Great video, all the info a 1st timer like me needed to put a 9" together correctly. Highly recommended to all folks looking to do it themselves.
http://badshoeproductions.com/
Great video, all the info a 1st timer like me needed to put a 9" together correctly. Highly recommended to all folks looking to do it themselves.
Postmaster
Joined: Apr 2004
Posts: 3,005
Likes: 2
From: Santa Clarita
Don't get me wrong here fellas, the DVD is great and doing it yourself is right down my alley, but how many times do you have to pull apart and put a 3rd member back together? I figure once... hopefully. As much as I would love to learn how to put one together correctly, for me it was easier to have a pro do it for me the correct way. Another way to go is purchase a whole 3rd member already put together. Sometimes you find great deals at swap meets. I have two members with different gear ratios ready to go. I think I paid $80 for them at a junk yard.
