3rd gen rear end swap??
Thread Starter
8 Second Club
iTrader: (1)
Joined: Nov 2001
Posts: 3,697
Likes: 1
From: the not so stock tribe
3rd gen rear end swap?? will a rear end from a late 80's 3rd gen camaro fit on our ls1's?? i know the brakes won't but will the stock 4th gen braks and backing plate fit on these rear ends?
Re: 3rd gen rear end swap?? Yes, I believe they are 100% interchangeable.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
Staging Lane
Joined: Nov 2001
Posts: 61
Likes: 0
From: Chesapeake, OH
Re: 3rd gen rear end swap?? The 3rd gen rearends are narrower and may require using wheel spacers for stock rims (however, the narrower rear may allow you to use a deeper dish custom wheel). Also, they have no ABS or TCS provisions. If using a 3rd gen rearend I would try to find an '89 Borg Warner 9 bolt rearend out of an IROC or GTA or TPI Formula that had the G92 option. That year was the last year that 9 bolt rears were offered and had the 11.65 rotors and PBR alum calipers. The G92's were 3 series posi's with 3.27 gears in auto's and 3.45's in 5 speed cars. TRUE ratio 3.73 and 4.10 gears are available for them from a guy on thirdgen.org. Avoid the 2.77 geared 9 bolts if you can because it will set you back about $400 for a 3 series posi for them when using lower gears. The 9 bolts are better than the 10 bolt because they have a 7.75" ring gear instead of a 7.625" and they have bolt in axles instead of the crappy c-clips. They are supposedly 30 to 40% stronger than the 10 bolt. Also some 3rd gens were upgraded by the dealer with 8.5" Dana 44 rearends but they are very rare. Hope this helps.
[ February 17, 2002: Message edited by: Dwain Brammer ]</p>
[ February 17, 2002: Message edited by: Dwain Brammer ]</p>
Teching In
Joined: Nov 2001
Posts: 32
Likes: 0
From: MFBA / SS Racing
Re: 3rd gen rear end swap?? [quote]Originally posted by 1dirtyZ:
<strong>thanks man, very helpful.
i never knew camaros came with 9 inch rear ends.
now how much narrower are they??</strong><hr></blockquote>
Actually, they're 9 bolt, not 9 inch <img src="gr_images/icons/wink.gif" border="0">
As far as size goes, I want to say that they're 1 1/2" narrower on each side.
Hope this helps.
[ February 18, 2002: Message edited by: Toph ]</p>
<strong>thanks man, very helpful.
i never knew camaros came with 9 inch rear ends.
now how much narrower are they??</strong><hr></blockquote>
Actually, they're 9 bolt, not 9 inch <img src="gr_images/icons/wink.gif" border="0">
As far as size goes, I want to say that they're 1 1/2" narrower on each side.
Hope this helps.
[ February 18, 2002: Message edited by: Toph ]</p>
Thread Starter
8 Second Club
iTrader: (1)
Joined: Nov 2001
Posts: 3,697
Likes: 1
From: the not so stock tribe
Re: 3rd gen rear end swap?? <img src="images/icons/confused.gif" border="0"> nine bolt?? what are the visual differences from the outside? ( nine bolts on the diff cover??) what other cars came with these rears?
how much stronger are the dana's when compared to a stock 10 bolt?
how much stronger are the dana's when compared to a stock 10 bolt?
Trending Topics
Re: 3rd gen rear end swap?? I'd only mess with the Dana 44 rearend/3rd gen.
The rest are no stronger what I know.
3rd gen is 1" narrower per side, or more. Sounds like Toph might know.
The rest are no stronger what I know.
3rd gen is 1" narrower per side, or more. Sounds like Toph might know.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo Staging Lane
Joined: Nov 2001
Posts: 61
Likes: 0
From: Chesapeake, OH
Re: 3rd gen rear end swap?? Yes 3rd gen rears are 1.5" narrower per side. I also said 9 bolt, not 9 inch. Neither it nor a Dana 44 will be anywhere as strong as a 12 bolt or 9". But they are cheap alternatives. I personally would not fool with either in a 4th gen because ABS and for daily drivers TCS is worth keeping if you have them. But for a real tight budget a 9 bolt third gen rear will get you by if you are running street tires and not making over 400 hp. It will last longer than a 10 bolt will under the same circumstances. If you're making real power and making hard launces at the track you'll have to bite the bullet and get at least a 12 bolt. I'd go 9" in extreme cases.
ALSO: The only f-body to come stock with the Dana 44 was the 91/92 Firehawks, which only like 25 were made. They were never used on the 89 TTA's. GM used to sell the rears over-the-counter before and after that thru their GMPP line. So some cars were upgraded by their owners with them. I see them for sale occasionally on thirdgen.org but it is rare and usually they want alot for them used. SLP was selling new ones last time I checked for $1600 so their not cheap.
[ February 18, 2002: Message edited by: Dwain Brammer ]</p>
ALSO: The only f-body to come stock with the Dana 44 was the 91/92 Firehawks, which only like 25 were made. They were never used on the 89 TTA's. GM used to sell the rears over-the-counter before and after that thru their GMPP line. So some cars were upgraded by their owners with them. I see them for sale occasionally on thirdgen.org but it is rare and usually they want alot for them used. SLP was selling new ones last time I checked for $1600 so their not cheap.
[ February 18, 2002: Message edited by: Dwain Brammer ]</p>
Teching In
Joined: Nov 2001
Posts: 37
Likes: 0
Re: 3rd gen rear end swap?? 9" stock in thirdgens... I wish, then I wouldn't have had to buy mine!
Anyhow, the 9-bolts are an australian rear and have, you guessed it, 9 bolts on the diff cover. They also utilize axle retainers at the end of the axle tube just like the ford 9" (i.e. no c-clips). 9 bolt rears have a 7.75" ring gear (compared to the 7.625"/7.5" 10 bolts) and all have 28 spline axles (early thirdgen 10-bolts had 26 spline). I believe (though I'm not certain) that the 9-bolt also has some sort of pinion support that the 10-bolt lacks--I know one of the biggest failures of the 10-bolt is that the case flex and allows the pinion to walk up the ring gear. <img src="gr_eek2.gif" border="0"> 9-bolt parts are a bit more expensive though, and the gear choices were limited until a year or so ago to 3.08, 3.27, 3.45, and 3.70 (aftermarket). There's a few thirdgen guys I know running 9-bolts behind big blocks... that should tell you right there that they're stronger than the stock 10-bolts.
Thirdgen rears are definitely narrower than fourthgen rears, but the difference is past the suspension mounting points. Thirdgenners swap to fourthgen rears all the time, all that's required is using 4th gen rims. To go the other way, you could use spacers.
As far as swapping into an LS1, what you want is actually a DRUM rear 9-bolt (the below picture is an 89 9-bolt utilizing the 89-97 PBR disc brakes). LS1 rear brakes can be mounted up to the drum rears fairly simply IIRC.
Here's a 9-bolt in case anyone wondered what they looked like:
[ February 19, 2002: Message edited by: 84ZZ4 ]</p>
Anyhow, the 9-bolts are an australian rear and have, you guessed it, 9 bolts on the diff cover. They also utilize axle retainers at the end of the axle tube just like the ford 9" (i.e. no c-clips). 9 bolt rears have a 7.75" ring gear (compared to the 7.625"/7.5" 10 bolts) and all have 28 spline axles (early thirdgen 10-bolts had 26 spline). I believe (though I'm not certain) that the 9-bolt also has some sort of pinion support that the 10-bolt lacks--I know one of the biggest failures of the 10-bolt is that the case flex and allows the pinion to walk up the ring gear. <img src="gr_eek2.gif" border="0"> 9-bolt parts are a bit more expensive though, and the gear choices were limited until a year or so ago to 3.08, 3.27, 3.45, and 3.70 (aftermarket). There's a few thirdgen guys I know running 9-bolts behind big blocks... that should tell you right there that they're stronger than the stock 10-bolts.
Thirdgen rears are definitely narrower than fourthgen rears, but the difference is past the suspension mounting points. Thirdgenners swap to fourthgen rears all the time, all that's required is using 4th gen rims. To go the other way, you could use spacers.
As far as swapping into an LS1, what you want is actually a DRUM rear 9-bolt (the below picture is an 89 9-bolt utilizing the 89-97 PBR disc brakes). LS1 rear brakes can be mounted up to the drum rears fairly simply IIRC.
Here's a 9-bolt in case anyone wondered what they looked like:
[ February 19, 2002: Message edited by: 84ZZ4 ]</p>
