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Everything I know about 9-Bolt Rearends!

Old 03-07-2005, 03:55 PM
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Yeah they do, they just don't know it.
Double check for yourself though. Go to thier list of individual differential parts. It lists all the part numbers for each part they offer for the various rearends. The crush sleeve pn is the same for all of those rears including the 9 bolt. A solid pinion spacer replaces a crush sleeve.
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Old 03-07-2005, 03:59 PM
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sweet thanks.
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Old 03-07-2005, 04:14 PM
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Hey draino. One more quick question for you. The 4114 solid pinion spacer, it comes with shims, are they the severe duty shims or just normal ones? Thanks.
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Old 03-07-2005, 04:26 PM
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They're just shims for the spacer. The severe duty are seperate ones which go inplace of the regular pinion shims.
Another thing you might be interested in if you're gonna set this up yourself.
Reider racing sells setup pinion bearings that slide on and off easily. Should save alot of time and hassle when setting one up.
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Old 03-07-2005, 05:12 PM
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Ok, thanks again
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Old 03-23-2005, 11:07 AM
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9 bolt axle

One other question about the 9 bolt axle, are they befier than the normal 7.5 and 7.625 10 bolt rear end

Thank's for any reply.

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Old 03-23-2005, 11:24 AM
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Yes. The Dana 44 is beefier still, but hard to find.
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Old 04-10-2005, 09:15 PM
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Awesome thread!

Drain89, thanks for all your time helping the rest of us out.
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Old 04-11-2005, 05:32 PM
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IROC: You're welcome!

Parrydise7: Or waaaayyyy better than the Dana 44.....a 12 bolt. Mine finally arrived from Strange Friday. 33 spline axles, 3.90 Richmond gears, Detroit Tru-Trac, and a Chromoly 1350 yoke.
Just under $2100 with truck freight thru Tbyrne on their last gp they did.
For what people want for dana 44's anymore you should just save up and buy a 12 bolt or 9".
Just cause Dana's are rare people want a mint for them. They're not really worth it. I remember when you could find them on the classifieds here for 400-600. Ebay ruined that!
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Old 04-11-2005, 05:50 PM
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Does anyone know of a source for the axle vent? Mine has gone south and sprayed my exaust and chassis with gear oil saturday! GM has discontinued them...
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Old 04-12-2005, 05:17 AM
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The new GTO does use a 9 bolt, but most things don't interchange, no torque arm.
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Old 04-18-2005, 01:27 PM
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on that gto 9-bolt..would gear sets interchange? i'm on the phone with pontiac trying to find out more on the rear but they are practically useless over the phone.

what do you guys know about the 9 bolt in the new gto? which parts are interchangable?
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Old 04-18-2005, 04:25 PM
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I think it ended up not getting a 9 bolt. It's got a newer design I believe. And it's IRS.
I think it was you I told in the other post where you can get 3.70's. That's you're only option unless you want to find a set of used 3.27's or 3.45's (good luck!).
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Old 04-18-2005, 04:54 PM
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yeah it was me..i'm just looking for less expensive options than $550 for a full kit.. thanks. I did locate a set of 3.70's locally for $300, I have to compare that with internet deals.
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Old 04-18-2005, 06:38 PM
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That should be about the going rate for 3.70's new. Call the other guys. Jeg's sells the U.S. Gear ones. They used to be the cheapest. Randy's probably is the cheapest now. Good luck.
The dealer will be the most expensive! That's if they still had them. 3.70's have been discontinued from GM for years now.
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Old 05-09-2005, 09:12 AM
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What thread pitch is the bolt for the carrier bearing cap? And if I was to get a stud for it instead of the bolt what length stud should I get? I looked in the parts book but I dont think it said what the bolts were just the part number.

Also what are the thread pitch for the yoke bolts? The ones that attach the straps to the yoke to hold the driveshaft U-joints in? Is the yoke for the 9 bolt interchangable with the 10 bolt? I would like to get a new yoke if I can but I doubt anyone makes an aftermarket yoke for the 9 bolt.
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Old 05-10-2005, 06:36 PM
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We are going to machine the first sample castings today or tomorrow. Let everyone know. The first few guys to put in there orders can have these. We will order enough castings to cover everyone who would like one. The price on all covers are going to be going up. But we will keep this cover at the old price to give all the folks that have been waiting for so long a chance to get one.

Sorry for the extended wait, but we seem to be at the finish line. To place an order you will have to call TA by phone, no e-mail.

480-922-6807
Mike Tomaszewski
TA Performance Products Inc.

ORDER NOW!
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Old 10-12-2005, 07:56 PM
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Originally posted by drain89
They're just shims for the spacer. The severe duty are seperate ones which go inplace of the regular pinion shims.
Another thing you might be interested in if you're gonna set this up yourself.
Reider racing sells setup pinion bearings that slide on and off easily. Should save alot of time and hassle when setting one up.

I must have read this a hundred times and I never caught this reply befor but, the 9 bolt uses the shims under the bearing race. this is what most places call for when using there severe duty shims. so incase someone get the pinion shims and can/t figure out why they seem too big. this is why.



has anyone used the solid pinion spacer on the 9 bolt?

why cant we use one for a 10 bolt? the crush spacer is the same size and shape all the way around as the 10 bolt one.



Here is the posi rebuild link. if nothing else it will give you guys some great pictures of the posi https://www.thirdgen.org/techbb2/sho...ighlight=9bolt

Last edited by 88 350 tpi formula; 10-13-2005 at 01:39 PM.
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Old 10-23-2005, 08:54 AM
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My 9 bolt is out of the car rite now and I checked the posi and come up with between 35 to 40 ft lbs of torque until the axle slips. Is it time for a rebuild or shims or will this posi hold up for a while??
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Old 12-12-2005, 05:48 PM
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I really need 2 ring gear bolts. Anyone know where I can find them?? No one has them!!!
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Old 12-23-2005, 11:59 PM
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All this info is excellent and most helpful as my '83 Z28 has a BW 9 bolt disc posi rear.Even the aluminum special fuid use tag is till on it.Meaning more than likely the cover has never been off(she's showing 43K).I need to check the vent tube as I have some fluid on top of the case.My '95 Jimmy's front axle vent tube came off and did the same.
In swapping out my wheels I did drain89's torque test on my posi and it withstood the 80lb/ft that the wheels require.Also checked the code on axle tube and I have a 3.23 gear.

Last edited by coolram62; 12-29-2005 at 08:51 AM.
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Old 12-26-2005, 03:53 PM
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9 bolt gears

anyone have any opinion on using yukon or motive gears ,,,do thay hold up or are they weak peices of you know what,,,curious because these gears are about half the price of strange or precicion gears,,,and i am thinking that pro street gears mite be a bit of overkill in my case,,,and am building this car on a tite budget,,,i have about a 400 horse 350 going through a bw t-5 and into the 9 bolt ,,,wanting to use 3:73 gears or more if i can find em,,,to heck with mileage,,i wanna go fast
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Old 05-18-2006, 11:54 PM
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Originally Posted by drain89


ADDING STRENGTH TO A 9BOLT REAR:
This is what I've done to mine, my car is not finished so it hasn't been tested yet.
-Replace bearing cap bolts with ARP 190,000 psi cap screws. I ordered mine direct from ARP. Cost me like $15 for the 4 of them. Cheap insurance. You could use studs instead of bolts for slightly more strength. TA Performance will be offering a bearing cap stud kit soon.
-Ratech Solid Pinion Spacer 4114 instead of using crush sleeve.
-Ratech Severe Duty Pinion Shims 1133. Adds reliability plus makes changing gears easier.
-Dry Film Lubricant on ring and pinion as well as internal carrier gears. I used Tech Line brand and applied it myself. Just check with your wife first before using the oven to cure it.....trust me! Seriously though, it's cheap insurance and you can get it from Jegs or Summit.
-Check posi and shim/tighten if necessary.
-A support cover would be a great addition and I'm working with TA Performance to try to get one made. Hopefully soon!
-Another option is Moser Axles. You'll probably break the gears first, but if you think it's necessary....they'll make you a set. I didn't think they were worth it.


This is all the info I have to this point.
Good Luck! Dwain "Draino" Brammer
Anyone know the part number for the ARP bolts mentioned above?
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Old 05-19-2006, 03:57 PM
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call TA performance. I got my girdle cover and the kit from them.
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Old 05-19-2006, 04:54 PM
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Originally Posted by maroguy1
call TA performance. I got my girdle cover and the kit from them.
Thanks but I would rather get a part # and order through Autozone because I get a discount. I also need the part number for ring gear bolts. Thanks
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Old 05-19-2006, 10:55 PM
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Good luck on the ring gear bolts. I had to replace 2 of mine and no one absolutely no one has them. I ended up getting mine from diffsoultions.com and he said that was his last set. You probably won't be able to find any parts for this rear from autozone. I tried and all they had was the cover gasket and that was it. When I rebuilt mine I had to get parts from 3 different website sources to do the complete job. Parts are very scarce for these.
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Old 05-20-2006, 06:33 PM
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You must have gotten a bad parts guy. All the bearings and seals were listed in the Timken catalog.
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Old 06-04-2006, 10:26 PM
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Why is this not yet a sticky?

Or possibly copy it over to the trans/diff board and sticky it there!
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Old 06-05-2006, 05:25 PM
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Good Luck I just tried mine out after the rebuild and it seems real nice compared to the 7.5
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Old 07-23-2006, 12:38 AM
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Those ring gear bolts are available at Ratech. Ratech

The ARP website has an online catelog with part #'s. ARP | The Official Website of Automotive Racing Products

By the way, I'm with Drain and 84. Why isn't this a sticky? There's some great stuff in here. Thanks a lot for putting this together Drain.

Last edited by 87IROCZ350TPI; 07-23-2006 at 12:42 AM.
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Old 07-23-2006, 08:59 PM
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Maybe its just me but i didn't see a listing for the 9 bolt on the ring gear bolts from ARP on that site. I did call ratech about 6 months ago for the ring gear bolts and they said they did not have them. Maybe they decided to stock them after that!!
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Old 07-23-2006, 09:08 PM
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Originally Posted by drain89
ADDING STRENGTH TO A 9BOLT REAR:
-Replace bearing cap bolts with ARP 190,000 psi cap screws. I ordered mine direct from ARP. Cost me like $15 for the 4 of them.
.
----------
Originally Posted by NoItsNotForSale
Anyone know the part number for the ARP bolts mentioned above?
The ARP link was to help NoItsNotForSale find the cap bolts. Not ring gear bolts. Ratech is now stocking those ring gear bolts. I just ordered bearings from them and almost got the bolts as well, but realized that I just don't have the time to service the posi while I'm in there, so there was no need.

Last edited by 87IROCZ350TPI; 07-23-2006 at 09:14 PM. Reason: Automerged Doublepost
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Old 04-27-2007, 09:12 PM
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Re: Everything I know about 9-Bolt Rearends!

so what im getting from this is that the 9 bolt rears are actually stronger than the 10 bolts? I trashed my 10bolt doin a burnout on a wet road. i picked up a 9 bolt with 3.27gears and later thought that i should have invested in something a little stronger.
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Old 04-28-2007, 11:15 PM
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Re: Everything I know about 9-Bolt Rearends!

Overall, the 9-bolt is certainly stronger than the 10. The only downside to the 9-bolt is the lack of parts availability. Fortunately, that has begun to change. More and more suppliers are offering 9-bolt applications.
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Old 05-23-2007, 08:05 AM
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Re: Everything I know about 9-Bolt Rearends!

It a dumb question but how remove the axlex .I read that the axles are retained by plates .Wich plates? do it refert to the bearing cap?
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Old 05-23-2007, 11:53 AM
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Re: 9 bolt gears

Originally Posted by awstow2 View Post
anyone have any opinion on using yukon or motive gears ,,,do thay hold up or are they weak peices of you know what,,,curious because these gears are about half the price of strange or precicion gears,,,and i am thinking that pro street gears mite be a bit of overkill in my case,,,and am building this car on a tite budget,,,i have about a 400 horse 350 going through a bw t-5 and into the 9 bolt ,,,wanting to use 3:73 gears or more if i can find em,,,to heck with mileage,,i wanna go fast
Might as well buy the cheap ones, I have used all of them (3.70's) and they are all the same "loud whine" it says so on the box, of all them.
I think there must be one manufacturer and they all rebox them.
They also call them 3.73's but they are 3.70's (10-37) 3.73's are 11-41 that would make them stronger (one extra tooth on the pinion).
I'm thinking about buying a set and sending them to "Mikronite" for treatment.
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Old 06-08-2007, 08:01 PM
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Re: Everything I know about 9-Bolt Rearends!

Originally Posted by Pierre View Post
It a dumb question but how remove the axlex .I read that the axles are retained by plates .Wich plates? do it refert to the bearing cap?
The bearing caps do not hold the axles in at all, and there are no c-clips on the 9-bolts. The plates are located at the wheels. If you remove your wheels, you will see four bolts at the end of the axle tubes. One bolt on each corner of a rectangular plate. If you remove your brake assemblies and these bolts, the axles slide right out. Just keep in mind that once you remove one axle, do not rotate the other, or the splines will apparently be very difficult to reallign.
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Old 07-05-2007, 03:23 PM
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Re: Everything I know about 9-Bolt Rearends!

Do you have to use the GM limited slip additive in the BW 9 bolt posi rear?
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Old 07-07-2007, 01:08 AM
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Re: Everything I know about 9-Bolt Rearends!

Originally Posted by Fire"Dutch"Bird View Post
Do you have to use the GM limited slip additive in the BW 9 bolt posi rear?
Ive always wondered this to cause I read somewhere before that u didnt have to in 9-bolts, because im gonna be changing my fluid soon, and have never been able to find an answer for this I dont see why it would hurt thought to add it???
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Old 07-09-2007, 11:22 AM
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Re: Everything I know about 9-Bolt Rearends!

Originally Posted by 92RS(real slow) View Post
Ive always wondered this to cause I read somewhere before that u didn't have to in 9-bolts, because I'm gonna be changing my fluid soon, and have never been able to find an answer for this I don't see why it would hurt thought to add it???
To use or not to use this additive, that's the question, it's very confusing, some say use it, others say don't....
(I still use it, even with Castrol synthetic axle oil....)
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Old 10-08-2007, 12:32 PM
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Re: Everything I know about 9-Bolt Rearends!

Will this rearend fit in a 1982 Trans Am?
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Old 10-08-2007, 12:37 PM
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Re: Everything I know about 9-Bolt Rearends!

Will this rearend fit in a 1982 Trans Am?
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Old 02-15-2008, 08:44 PM
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Re: Everything I know about 9-Bolt Rearends!

Originally Posted by 87IROCZ350TPI View Post
The bearing caps do not hold the axles in at all, and there are no c-clips on the 9-bolts. The plates are located at the wheels. If you remove your wheels, you will see four bolts at the end of the axle tubes. One bolt on each corner of a rectangular plate. If you remove your brake assemblies and these bolts, the axles slide right out. Just keep in mind that once you remove one axle, do not rotate the other, or the splines will apparently be very difficult to reallign.
I know I am bringing this up from the dead, but I removed the 4 nuts and my axles still aren't sliding out. Am I doing something wrong?
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Old 02-15-2008, 08:56 PM
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Re: Everything I know about 9-Bolt Rearends!

Originally Posted by Bullydawg View Post
I know I am bringing this up from the dead, but I removed the 4 nuts and my axles still aren't sliding out. Am I doing something wrong?
You may need a slide hammer to get them out, they should be in there pretty tight
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Old 02-15-2008, 09:21 PM
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Re: Everything I know about 9-Bolt Rearends!

Okay, Where do I get a slide hammer? Thanks for the response BTW.
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Old 02-15-2008, 11:15 PM
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Re: Everything I know about 9-Bolt Rearends!

I got mine from Harbor Freight.
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Old 02-15-2008, 11:34 PM
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Re: Everything I know about 9-Bolt Rearends!

How much was it, and how did it work?

Edit: Is this the one? http://www.harborfreight.com/cpi/cta...temnumber=5469
Also, did you use it on your axles?

Last edited by Bullydawg; 02-15-2008 at 11:59 PM.
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Old 02-16-2008, 11:01 AM
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Re: Everything I know about 9-Bolt Rearends!

I can't even get it to budge by hand. Will a slide hammer work? I can turn at most an 1/8 of a turn but nothing else.
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Old 02-17-2008, 12:49 AM
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Re: Everything I know about 9-Bolt Rearends!

I don't think the 9-bolt axle will come out without a slide hammer. the one I got from Harbor Freight looks more like their 13lb version:

http://www.harborfreight.com/cpi/cta...emnumber=38878

but I didn't see the axle flange adapter in that small picture on their website. it could be one of the unnamed accessories. I'm sure you could rig something up with chain and hooks and lugnuts.

the 2lb slide hammer might work, but doesn't have as much grunt as the 13lb slide. I think it came out with 2 or 3 whacks with the 13 pounder.

I also have the smaller 2lb ones, but I use those for pulling the front pumps out of transmissions.
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Old 02-17-2008, 02:38 AM
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Re: Everything I know about 9-Bolt Rearends!

I got it out. But, do I really have to get access to a Large bench vice to put my axle on then the carrier on the axle?
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