Everything I know about 9-Bolt Rearends!
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From: Chesapeake, Ohio
Car: 02 WS6 White/Ebony
Engine: LS1
Transmission: T56
Axle/Gears: Stock 3.42
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.
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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From: Milwaukee, WI
Car: 1984 z28
Engine: BBC
Transmission: TH400
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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From: Chesapeake, Ohio
Car: 02 WS6 White/Ebony
Engine: LS1
Transmission: T56
Axle/Gears: Stock 3.42
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.
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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From: CANADA
Car: 1984 Camaro Z28
Engine: 5.0L
Transmission: Heavy duty TH700R4 B&M shifter
Axle/Gears: BorgWarner 9 bolt Ratio 3.45
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.
Thank's for any reply.
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From: Chesapeake, Ohio
Car: 02 WS6 White/Ebony
Engine: LS1
Transmission: T56
Axle/Gears: Stock 3.42
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!
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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Joined: Dec 2003
Posts: 690
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From: Minneapolis, MN
Car: 1989 Camaro RS
Engine: ZZ4 350
Transmission: T-5
Axle/Gears: BW 9-bolt w/3.73
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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From: Long Island
Car: 88 GTA, 00 SS
Engine: L98, LS1
Transmission: 700R4, T56
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?
what do you guys know about the 9 bolt in the new gto? which parts are interchangable?
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From: Chesapeake, Ohio
Car: 02 WS6 White/Ebony
Engine: LS1
Transmission: T56
Axle/Gears: Stock 3.42
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!).
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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From: Long Island
Car: 88 GTA, 00 SS
Engine: L98, LS1
Transmission: 700R4, T56
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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From: Chesapeake, Ohio
Car: 02 WS6 White/Ebony
Engine: LS1
Transmission: T56
Axle/Gears: Stock 3.42
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.
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.
Joined: Sep 1999
Posts: 4,353
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From: NJ
Car: 92 Firebird
Engine: 4.8 LR4
Transmission: T56
Axle/Gears: 3.45 9 Bolt
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.
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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From: Milwaukee, WI
Car: 1984 z28
Engine: BBC
Transmission: TH400
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!
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!
Joined: Dec 1999
Posts: 3,544
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From: WI,USA
Car: 89 FORMULA 350, 91 Z28 Convertible
Engine: ls1, LB9
Transmission: t56, Auto
Axle/Gears: S60/ 3.73
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.
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
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From: West Allis, WI
Car: 85 iroc & 81 sc
Engine: 357 tpi 350 4bbl
Transmission: 700r4/ richmond 4speed
Axle/Gears: 9 bolt 3.45/3.42 8.5"
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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From: West Allis, WI
Car: 85 iroc & 81 sc
Engine: 357 tpi 350 4bbl
Transmission: 700r4/ richmond 4speed
Axle/Gears: 9 bolt 3.45/3.42 8.5"
I really need 2 ring gear bolts. Anyone know where I can find them?? No one has them!!!
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From: Beaufort South Carolina
Car: 1983 Camaro Z/28
Engine: LU5 305 CFI
Transmission: 700R4
Axle/Gears: J65/G80/G92-3.23
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.
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.
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From: texas
Car: '83 Z28
Engine: 355
Transmission: t-5
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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From: Bonham TX
Car: 87 & 89 Iroc's
Engine: 5.0 - 5.7
Transmission: 700R's
Axle/Gears: 2.77 - 3.70
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
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From: Bonham TX
Car: 87 & 89 Iroc's
Engine: 5.0 - 5.7
Transmission: 700R's
Axle/Gears: 2.77 - 3.70
Originally Posted by maroguy1
call TA performance. I got my girdle cover and the kit from them.
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Joined: Aug 2003
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From: West Allis, WI
Car: 85 iroc & 81 sc
Engine: 357 tpi 350 4bbl
Transmission: 700r4/ richmond 4speed
Axle/Gears: 9 bolt 3.45/3.42 8.5"
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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Joined: Aug 2003
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From: West Allis, WI
Car: 85 iroc & 81 sc
Engine: 357 tpi 350 4bbl
Transmission: 700r4/ richmond 4speed
Axle/Gears: 9 bolt 3.45/3.42 8.5"
Good Luck I just tried mine out after the rebuild and it seems real nice compared to the 7.5
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Joined: Jun 2006
Posts: 408
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From: NJ
Car: 87 IROC
Engine: 5.7 TPI
Transmission: 700-R4
Axle/Gears: BW 7.75" 3.27
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.
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.
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Joined: Aug 2003
Posts: 186
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From: West Allis, WI
Car: 85 iroc & 81 sc
Engine: 357 tpi 350 4bbl
Transmission: 700r4/ richmond 4speed
Axle/Gears: 9 bolt 3.45/3.42 8.5"
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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Joined: Jun 2006
Posts: 408
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From: NJ
Car: 87 IROC
Engine: 5.7 TPI
Transmission: 700-R4
Axle/Gears: BW 7.75" 3.27
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.
-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?
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Joined: Apr 2006
Posts: 53
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From: Victoria, B.C.
Car: 1986 Iroc-Z
Engine: 350cid crate
Transmission: t5- 5speed
Axle/Gears: stock
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.
. i picked up a 9 bolt with 3.27gears and later thought that i should have invested in something a little stronger. Member
Joined: Jun 2006
Posts: 408
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From: NJ
Car: 87 IROC
Engine: 5.7 TPI
Transmission: 700-R4
Axle/Gears: BW 7.75" 3.27
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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Joined: Apr 2006
Posts: 29
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Car: 1984 Trans Am WS6
Engine: 305 HO
Transmission: TH700R4
Axle/Gears: 87 Borg warner 3.27
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?
Joined: Mar 2000
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From: Orange, CA
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: 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
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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Joined: Jun 2006
Posts: 408
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From: NJ
Car: 87 IROC
Engine: 5.7 TPI
Transmission: 700-R4
Axle/Gears: BW 7.75" 3.27
Re: Everything I know about 9-Bolt Rearends!
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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From: Northern part of The Netherlands
Car: '88 Firebird Formula 350
Engine: 350 (5.7 TPI)
Transmission: auto 700R4
Axle/Gears: BW 9-bolt L.S.
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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Joined: Sep 2005
Posts: 2,151
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From: Osceola Indiana
Car: 92 RS(sold) 1989 IROC-Z
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: ones that turn
Re: Everything I know about 9-Bolt Rearends!
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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From: Northern part of The Netherlands
Car: '88 Firebird Formula 350
Engine: 350 (5.7 TPI)
Transmission: auto 700R4
Axle/Gears: BW 9-bolt L.S.
Re: Everything I know about 9-Bolt Rearends!
(I still use it, even with Castrol synthetic axle oil....)
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Posts: 121
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From: Gulfport, MS
Car: 1982 Pontiac Trans Am
Engine: Chevy 350 Vortec Roller
Transmission: Turbo 350
Axle/Gears: Moser 4.11
Re: Everything I know about 9-Bolt Rearends!
Will this rearend fit in a 1982 Trans Am?
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From: Gulfport, MS
Car: 1982 Pontiac Trans Am
Engine: Chevy 350 Vortec Roller
Transmission: Turbo 350
Axle/Gears: Moser 4.11
Re: Everything I know about 9-Bolt Rearends!
Will this rearend fit in a 1982 Trans Am?
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From: Alamogordo, NM
Car: 88 Formula 350
Engine: 5.7
Transmission: T-56
Axle/Gears: 9" 3.89
Re: Everything I know about 9-Bolt Rearends!
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.
Joined: Sep 1999
Posts: 4,353
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From: NJ
Car: 92 Firebird
Engine: 4.8 LR4
Transmission: T56
Axle/Gears: 3.45 9 Bolt
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From: Alamogordo, NM
Car: 88 Formula 350
Engine: 5.7
Transmission: T-56
Axle/Gears: 9" 3.89
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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From: Alamogordo, NM
Car: 88 Formula 350
Engine: 5.7
Transmission: T-56
Axle/Gears: 9" 3.89
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?
Edit: Is this the one? http://www.harborfreight.com/cpi/cta...temnumber=5469
Also, did you use it on your axles?
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From: Alamogordo, NM
Car: 88 Formula 350
Engine: 5.7
Transmission: T-56
Axle/Gears: 9" 3.89
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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Joined: Apr 2005
Posts: 286
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From: USA
Car: 90 IROC
Engine: 5.7L TPI
Transmission: 700R4
Axle/Gears: 9-bolt BW
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.
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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From: Alamogordo, NM
Car: 88 Formula 350
Engine: 5.7
Transmission: T-56
Axle/Gears: 9" 3.89
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?