Changing rear differential axle flanges.
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Car: 87' IROC
Engine: L98
Transmission: T56
Changing rear differential axle flanges.
Guys,
I currently have a 9 bolt with shot friction cones. I could spend $1000 rebuilding the limited slip, new bearings and seals, and changing to 3.73 gears. But I'd still be stuck with the modest 9 bolt limited slip. I would like to switch to a helical limited slip like the T2R for a higher bias ratio. That rules out the 9 bolt. I don't want to upgrade to a 12 bolt or 9" for weight reasons, and I can't seem to find a Dana 44. That leaves the 10 bolt.
Car is used for pleasure driving and track days, no drag racing. So I think the 10 bolt will live fine.
My major beef with the 10 bolt is the c-clip axles and problems that causes with pad knock back on fixed calipers. Obviously the 9 bolt has bolt in axles.
My question is, has anyone cut off the 10 bolt axle flanges and replaced with a flange from a bolt in axle differential like the 9 bolt, D44, 9"??? I would imagine this would require custom axles, but I don't see that as a big deal.
Thoughts???
P.S. I am not interested in anyone telling me to just get a 12 bolt/9". Technical discussion only please.
I currently have a 9 bolt with shot friction cones. I could spend $1000 rebuilding the limited slip, new bearings and seals, and changing to 3.73 gears. But I'd still be stuck with the modest 9 bolt limited slip. I would like to switch to a helical limited slip like the T2R for a higher bias ratio. That rules out the 9 bolt. I don't want to upgrade to a 12 bolt or 9" for weight reasons, and I can't seem to find a Dana 44. That leaves the 10 bolt.
Car is used for pleasure driving and track days, no drag racing. So I think the 10 bolt will live fine.
My major beef with the 10 bolt is the c-clip axles and problems that causes with pad knock back on fixed calipers. Obviously the 9 bolt has bolt in axles.
My question is, has anyone cut off the 10 bolt axle flanges and replaced with a flange from a bolt in axle differential like the 9 bolt, D44, 9"??? I would imagine this would require custom axles, but I don't see that as a big deal.
Thoughts???
P.S. I am not interested in anyone telling me to just get a 12 bolt/9". Technical discussion only please.
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Car: GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: Aussie 9-bolt/3.27 posi
Re: Changing rear differential axle flanges.
There is a bolt-in conversion kit made for the 10-bolts already if you wanna do that. IIRC, it runs about $150 at Summit/Jegs.
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Car: GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: Aussie 9-bolt/3.27 posi
Re: Changing rear differential axle flanges.
For just a driver & road course, I don't see the need to eliminate the c-clips anyways.
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Car: GTA
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Re: Changing rear differential axle flanges.
I read that the first time around. Sorry if I tried to help you the first time, but "pad knock" isn't exactly an issue to worry about since there are millions out there every day with no issues.
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#8
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Car: 87' IROC
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Re: Changing rear differential axle flanges.
Look, I know you are trying to help, but it isn't working. I'm not interested in a discussion on why I shouldn't do it. Rather, I want a discussion on "how" to do it. Pad knock back is a known problem with c-clip axles, its really not worth debating.
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Car: 86 Trans Am, 92 Firebird
Engine: 408 sbc, 3.1L of raw power
Transmission: TKO600, T5
Axle/Gears: Moser 9", 3:70 trutac, 3:23 torsion
Re: Changing rear differential axle flanges.
so whats the difference in length between the 10 an d9 bolt? should be about the same since the wheels all fit the same way right? I dont see any reason why you could not cut the housing ends off a 9 bolt and have the welded to the 10 bolt axle. Obviously you will need this done professionally on a jig to make sure things are square, but i see no issue. If you can do that, you can eliminate the need for custom axles, since you can use 9 bolt ones.
as for stephen, pad knock back will be an issue with fixed calipers (they are not stock BTW). Driving down the street you may not notice much, but start tossing the car around aggressively and you will have problems.
actually, are 9 bolt 28 splines the same as the 10 bolt 28 splines? have to look into that
as for stephen, pad knock back will be an issue with fixed calipers (they are not stock BTW). Driving down the street you may not notice much, but start tossing the car around aggressively and you will have problems.
actually, are 9 bolt 28 splines the same as the 10 bolt 28 splines? have to look into that
Last edited by //<86TA>\\; 02-15-2012 at 05:16 PM.
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Axle/Gears: Aussie 9-bolt/3.27 posi
Re: Changing rear differential axle flanges.
In the end? I'm sorry I even tried to help you eliminate the c-clips. That is ALL I LOOKED INTO FOR YOU. It is the only already existing type of option out there, short of custom work like swapping the axle ends out (not exactly a cheap solution). I told you what is out there. It is up to YOU to decide if it for you or not.
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Car: 86 Trans Am, 92 Firebird
Engine: 408 sbc, 3.1L of raw power
Transmission: TKO600, T5
Axle/Gears: Moser 9", 3:70 trutac, 3:23 torsion
Re: Changing rear differential axle flanges.
In the end? I'm sorry I even tried to help you eliminate the c-clips. That is ALL I LOOKED INTO FOR YOU. It is the only already existing type of option out there, short of custom work like swapping the axle ends out (not exactly a cheap solution). I told you what is out there. It is up to YOU to decide if it for you or not.
My question is, has anyone cut off the 10 bolt axle flanges and replaced with a flange from a bolt in axle differential like the 9 bolt, D44, 9"??? I would imagine this would require custom axles, but I don't see that as a big deal.
as for the OP
suck it up and get a frod 9"
Last edited by //<86TA>\\; 02-15-2012 at 05:15 PM.
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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: Changing rear differential axle flanges.
so whats the difference in length between the 10 an d9 bolt? should be about the same since the wheels all fit the same way right? I dont see any reason why you could not cut the housing ends off a 9 bolt and have the welded to the 10 bolt axle. Obviously you will need this done professionally on a jig to make sure things are square, but i see no issue. If you can do that, you can eliminate the need for custom axles, since you can use 9 bolt ones.
actually, are 9 bolt 28 splines the same as the 10 bolt 28 splines? have to look into that
actually, are 9 bolt 28 splines the same as the 10 bolt 28 splines? have to look into that
#13
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Car: 87' IROC
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Re: Changing rear differential axle flanges.
Lol.
Yeah regarding the axles, I did not know the 10 bolt was also 28 spline. If anyone has a 10 bolt axle laying around, I can take some pictures of my 9 bolt splines and measure the axle lengths, maybe we can compare. If I can make this work with stock axles, this will be quite an inexpensive project.
Don also brings up a good point regarding the axle lengths.
Expect some pictures and measurements of my 9 bolt stuff tonight.
Yeah regarding the axles, I did not know the 10 bolt was also 28 spline. If anyone has a 10 bolt axle laying around, I can take some pictures of my 9 bolt splines and measure the axle lengths, maybe we can compare. If I can make this work with stock axles, this will be quite an inexpensive project.
Don also brings up a good point regarding the axle lengths.
Expect some pictures and measurements of my 9 bolt stuff tonight.
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Re: Changing rear differential axle flanges.
Took some measurements tonight. I would be very grateful if someone with some 10 bolt axles laying around could compare these numbers.
Passenger axle - 31 1/2" long
Driver axle - 28 7/8" long
Spline outer diameter - 1.2"
Passenger axle - 31 1/2" long
Driver axle - 28 7/8" long
Spline outer diameter - 1.2"
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Re: Changing rear differential axle flanges.
Thanks for the info.
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Re: Changing rear differential axle flanges.
Well I finally found a Dana 44 so this project is now officially canceled.
John
John
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Car: 1988 IROC-Z camaro
Engine: 355 TPI
Transmission: tko 500
Axle/Gears: Dana 44 3.31 posi pbr brakes
Re: Changing rear differential axle flanges.
Lucky! I gave up and am in the process of dumping more money into a rear end i really dont want to keep longterm but am stuck with lol.
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Car: 87' IROC
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Re: Changing rear differential axle flanges.
My car has 69k on it. First 50k were babied. I noticed reduced performance about 2k ago. I think I toasted it at the track though. Friction style limited slips get real hot will all the slipping around corners. Hopefully the T2R will be much better.
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Car: 89 5.7 IROC/95 LT1 Corvette
Engine: All 5.7's
Transmission: 700R4 (Roessler)/ZF6
Axle/Gears: 10 bolt Zexel 3.23's. CTW 17" wheel
Re: Changing rear differential axle flanges.
Really stupid question, But is there a Dana 44 that reasonably bolts into our cars?
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Car: 1989-92 FORMULA350 305 92 Hawkclone
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Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Changing rear differential axle flanges.
Yuuup direct bolt in.
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