Axle Tube Swap
#1
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Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Axle Tube Swap
Heads up - This may be really dumb, but....
We'd all like disk rears. Not enough 3rd Gen disk rears made. And those that were made aren't that good of brake from what I read. And 4th Gen rears too long - wheels stick out. Other rear disk brake options I see seem expensive, or difficult - so my theory/question.....
Is it not possible to remove the axle tubes from the 4th Gen rear, have the tubes shortened, and re-weld them into place?
Could keep 3rd gen wheels without disturbing look/rubbing tires, have disk rear, get posi rear cheap.
I thought I read that the tubes were only welded in 2 spots, and that everyone recommends having the tube welded all the way around anyway. The axles in the tubes would keep the alignment while re-welding the shortened tubes in place right?
Just a thought - I am certainly no expert, never even welded anything myself. Someone with experience tell me why it won't work.
We'd all like disk rears. Not enough 3rd Gen disk rears made. And those that were made aren't that good of brake from what I read. And 4th Gen rears too long - wheels stick out. Other rear disk brake options I see seem expensive, or difficult - so my theory/question.....
Is it not possible to remove the axle tubes from the 4th Gen rear, have the tubes shortened, and re-weld them into place?
Could keep 3rd gen wheels without disturbing look/rubbing tires, have disk rear, get posi rear cheap.
I thought I read that the tubes were only welded in 2 spots, and that everyone recommends having the tube welded all the way around anyway. The axles in the tubes would keep the alignment while re-welding the shortened tubes in place right?
Just a thought - I am certainly no expert, never even welded anything myself. Someone with experience tell me why it won't work.
#2
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Car: '01 GMC Sierra
Engine: 5.3L
Transmission: 4L60e
Axle/Gears: 3.73 eaton locker
This looks alot easier https://www.thirdgen.org/newdesign/t...reardisc.shtml
But your idea may also work.
But your idea may also work.
#3
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Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
A lot more work to swap axle tubes. You would also need alignment jigs so that when the tubes are welded back in, they're in alignment again. If they're out of alignment, you'll eat up bearings.
#4
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Car: 83 Z28
Engine: vortec 305 for now
Transmission: 5 speed
Yep, I've done just that, but as Stephen said it's a lot of work.
Don't underestimate a good set of drum brakes. If you're running 17inch wheels you can slide some pretty big drums on the rear. I know, discs are cool and all that, but at least you can have another option.
Don't underestimate a good set of drum brakes. If you're running 17inch wheels you can slide some pretty big drums on the rear. I know, discs are cool and all that, but at least you can have another option.
#5
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Car: 1988 Firebird, 2000 GTP
Engine: 327
Transmission: 700R4
Axle/Gears: 9" posi, 4.11
doing any welding on a rear runs the risk of warping the tubes. It is very important to keep it in a tight jig if you are going to be doing any large amount of welding. It's about like doing bodywork. You almost have to do it a small amount and let it cool to prevent warping. I suppose it is possible. sounds like a plan though. You might as well give it a shot and see how it turns out.
#6
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Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
I'm checking into it - I certainly can't do it myself. I know rods have custom rears made all the time.
I just figured that, after adding up the cost to make a 2.73 peg leg 3rd gen rear into a 3.?? posi AND then spending $200+ minimum on the brake parts (jy parts as per the article in tech sect) to get a posi disk rear - it would be more cost effective to pay someone to cut and reweld an existing 4th gen rear.
I'll post what I find.
*** Afterthought Question - is there any difference in 3rd gen (1992) axles and 4th gen axles that would prevent from using the 3rd gen axles in the shortened tubes?
I just figured that, after adding up the cost to make a 2.73 peg leg 3rd gen rear into a 3.?? posi AND then spending $200+ minimum on the brake parts (jy parts as per the article in tech sect) to get a posi disk rear - it would be more cost effective to pay someone to cut and reweld an existing 4th gen rear.
I'll post what I find.
*** Afterthought Question - is there any difference in 3rd gen (1992) axles and 4th gen axles that would prevent from using the 3rd gen axles in the shortened tubes?
Last edited by camaronewbie; 03-29-2005 at 03:28 PM.
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