How much is a borg-warner 9 bolt worth? I've got one and it has fairly low mileage, the posi works fine and its complete from disk to disk. I just need the room and I don't need it.

 

SOLD!!! (Depending on gear size of course). If it's 3.27 or better gearing I'll take it. $125 flat (shipping is included in that $125). If you don't know the gear ratio, get me the code off it and I'll look it up. The code should be on the drivers side axle housing somewhere. It usually consists of letters and numbers and I believe is 4 or 5 digits.

 

All the 9 bolts I've seen have the gear stamped on a tag bolted to the cover. Easy as that.

 

Interesting. My 9 bolt doesn't have that. Maybe it fell off or something. I do know that the gears have the ratio stamped right on them and actually have the BW stamp too to show that it's Borg Warner gears.

 

They sell for around $350 in So Cal. Shipping extra.

 

Well yay for California. You're lucky to find a 9 bolt around here and I can upgrade my current 9 bolt to better gears for around $400 so I'm definitely not paying $350 for a used rear end.

Like I said, I'll give $125 shipped. If that's too low then sell it to someone else.

 

Do you know what year it is from???

 

The rear-end came from a 1988 iroc-z t-top camaro witha 350 tuned port. We just put the motor and trans in a s-10 but kept the rear end because it had discs and posi. Then I saw it was a borg warner. The tag is a little rusty but I believe it has 3:08 Gears. $150 sounds a liittle cheap doesn't it? Shipping shouldn't be included in that price either should it?

 

With that gearing I'm not interested in it anyhow and good luck getting $150 out of it. It's only one step better than the 2.77s I have now. I think I'll just wait until my friend gets his corvette rear put under his Iroc because he's going to sell me his 10 bolt with 3.23 gears complete from disc to disc including the calipers ... all for $100.

 

Now that this is done, I will wade in.

I am not aware of any stamp on a 9-bolt rear housing that would indicate the gear ratio. This would not even make sense to do since the gears/carriers are interchangeable without changing the housing.

The different available 9-bolt factory ratios are listed elsewhere on this sute Assuming that this is the original rear end and you have access to the donor car, the RPO codes in the console box of your car should be able to tell you. You can decode the RPO's at this site as well.

The lower ratio 9-bolts probably aren't worth much more than $200, assuming the posi works. However, because 9-bolts are hard to find at reasonable prices and the posi's (for the most part) are unserviceable because they are cone rather than clutch-type, you should be able to find a buyer for it relativelty quickly. I drove 10 hours round-trip to buy a 2.77 9-bolt with a working posi for $150 a while back and I was glad to do it for that money. Note that I HAVE to have a 2.77 or 3.27 for my IROC to stay in my Solo II racing class in the SCCA.

If it turns out to be a 3.27 or higher, you have a piece that could command much more than $200. I would have been willing to buy a 3.27 with a working posi for $400 plus shipping a few months ago. If you don't have access to the RPO codes from the donor car, count the teeth. You'll do much better if you can tell the buyer exactly what the ratio is.

Good luck.

 

The ratio stamp (if still attached) is on one of the cover bolts and is a little metal tag the specifies the original ratio in the rear. If it's a 3.08 ratio, it's a series 2 carrier (2.77 & 3.08 ratios). I have brand new series 3 posi units and ratios to 4.10 available for 9 bolts. All the info is at www.9bolt.com

Miles
Diff Solutions

 

 

Keith,
they are serviceable. it says so in the FSM, it gives the specs to service it with shims, with instructions, and I serviced mine

and yeah !! I am auto-xing faster than ever

Larry

 

Yeah, I figured you might want to respond to that Larry. I knew you could shim them, but you are one of the few guys I've heard that has done it and been happy with the results. Don't misunderstand me, there are other guys that have done this well - I'm just a lousy mechanic.

I suppose my 9-bolt problems are about over. I am picking up a mint 98 Z28 on Thursday (LS1/M6!) and will be selling my IROC, my Monte SS, and my spares to offset the cost of the new Z... and best of all, I stay in F-Stock!

 

I have been POSI hunting the last couple of week-ends.... all of the 9-bolts I have come across seem to have the ratio stamped right into the ring gear. eg "3.27D" or "3.45D".

I have located a mint 3.27 9-bolt with drums.... I think I will be aquiring this unit soon.

 

Rare find considering the 9 bolts were almost always disc brakes except for the very very very few cars that came with the 9 bolt and the "disc delete" option. I know that was available on the '88 GTA. Not sure what others.

As far as the identification thing. I believe right before the ration there's also a BW stamped into the ring gear to indicate Borg Warner. There's also a tag that's attached to one of the bolts on the housing that has some numbers on it as well as the gear ratio that was in the housing stock. I found the one on mine this weekend. I already knew what I had by the RPO code but it was interesting to see that little tag.

 

I had a 3.08 drum 9 bolt in a 85 T/A. I just thought I would throw that out there.

Ben

 

Whoever the guy is that wants the rear SHIPPED for $125 needs to come back into the real world and realize that it would cost AT LEAST $125 just to ship the damn thing. Geez....

The 2.77 9 bolts are easy to find but hard to get rid of. No one wants them. I have an '88 complete posi, disc to disc, with the M/C and prop valve included, and I'm only asking $200 for the whole package...no bites yet.

As far as rebuilding the posi, I'm going to try that job myself when I get a few other projects finished. It doesn't seem THAT hard to do, but I'm sure you have to get it right or KABOOM!!!! 9 bolt parts everywhere.


Ed

 

That may be true but like I said, my friend said he'll sell me his 10 bolt disc rear with 3.23s for $100 when he gets the corvette rear under his car. I'd much rather stick with the stronger and lighter 9 bolt so I threw out $125. If the guy doesn't want to sell it for $125 then don't, it's that simple. It's no big loss to me.

 

In reviving this thread Im adding my info on my 89 GTA, I have no RPO list as of yet, I was curious as to what axle my car had so I went under to check it out and verified it has a 9 bolt cover with a tag intact, this tag read this: Slip resistant diff and what appeared to be something that said "US Approved" . this axle has rear discs and the car is a 305/5SPD.




I also wanted to see if my drive shaft was aluminum, I did so with a magnet that stuck right to it, this verifies steel doesnt it?

Im hoping this car is totally stock...Though my sig says so Im not completely sure yet...

 

Well after spending another hour in the search engine, I finally found the info for the last ? I asked. I most likely have a steel shaft, the tag most likely says "Spin Resistant Diff" "Use approved gear oil". Aussie rear.

 

yup should have been a tag with the gear ratio as well. normally its on 1 of the nuts, you can check the site for the ratio that should have come with the car.

 

LetsRock, if you still can't find the tag on the rear, just pull the cover off the pumpkin and read what is stamped on the ring gear, then you'll know for sure. I'd think you'll have a 3.08 or higher since you have a stick. And yes, you have a steel D/S.

Ed

 

Thats the next step,, Ill pull the pumpkin and make sure what it really is. Ive researched enough to find out it should have 3.42 or 3.45 gears based on info found here but with out my rpo label I cant be sure yet if the car was modded yet, it looks all original with the 5spd setup.

The trans went shortly after I bought it and needs a rebuild, its been sitting for 7 months now untouched since I got laid off.

The car fascinates me, Ive worshiped them secretly since High school. :hail: GTA

 

If it's a 9 bolt, it's 3.45's and if its a 10 bolt it's 3.42's.

Matthew

 

You said that the magnet does stick to the drive shaft right? If it did then its steel. Another way to tell is that the steel ones will normally be rusted while the aluminum ones dont rust. As far as the rear if you had the performance ratio option you should have 3.45s. If it wasnt then you should have 3.27s. This is assuming its a 9 bolt(I think thats what you said). If it is a 89 with 3.45s and disk brakes it is about the most sought after stock rear end out of thirdgens because it is the first year of the pbr brakes with the larger rotors and last(supposedly, I think they used some that were left in 90) year of the 9 bolt. This means it is the only year that used some of the parts to make those brakes work on a 9 bolt. It is the 9 bolt which is stronger and it is the best stock ratio made. Just those rear ends will go for several hundred dollars. If it is 3.27s though no biggie because those are still good gears and have the series 3 carrier.

Ben

 

Yeah, the 3.45 9 bolt alone, regardless of year, is one of the most sought after rear ends. Stronger than the 10 bolt and lighter than the ford 9 inch and the 3.45s are great gears.

A real nice find would be a 9 bolt with 3.70s stock which there were some of.

 

i have a 3.27 rear end out of an 86. I'm selling it for $275 and would prefer pick-up. It is complete from caliper to caliper and included proportioning valve and master cylinder. thanks

 

Yep, I was lucky enough to find a 3.45 rear about 45 minutes away. I then upgraded it to the newer disk brakes. Im pretty proud of it after the money and work to buy it and all of that brake stuff and convert the brakes.

Ben

 

My 88 GTA has a small tag attached to the upper left hand bolt that reads clear as day "3.27 ratio". If there is no tag, what's so hard with taking out 9 bolts and counting the teeth on gears? You should list rear end on e-bay. First place I go to find and sell stuff. $125.00 sounds like a slap in the face offer to me.