I'm just wondering how much a stock, rebuilt with all new internals gsl rear end will take - HP and Torque. Anybody know the max on them? Also, with around 350 HP, how long will one last, daily driven? Let me know guys, thanks in advance!

 

i heard that takes about 600hp, i dont know how much torque but that what i hear, theres alot of people that change their rear end for a ford 9" once they get more HP.

 

mine took 540 rwhp before i upgraded... i had to launch real easy 1.7 60 foot times was my best. after about 15 passes my axle shafts would twist alot so i would change them.... the hard launches kill the rear end quick!

 

I know that this is a old post but I am going to run 550whp in my 1st gen gsl. I planed on 8.8 but after looking at your post should I put mystock rear end back in the car?

 

Wow, old *** post...

 

Geez..you can say that again...February? And I thought Robert was back, lol...

 

My 100,000 old SE junkyard rearend has held up to about 300hp with no problems for the last 4 years.My small axle 82 GSL rearend stood up to a fairly torquey Chevy V-6/ 5 speed,in my GLC for over 10 years.
Its all about how you treat it.Plus,with that kind of power,your likely to lose some traction in the lower gears.That'll take some load off the rearend when the torque multiplication is high.

 

The ford 9" isnt all its cracked up to be, the 8.8 is a much stronger anre more efficient differential

 

I think peejay has something bad to say about the 8.8. Let's wait and see.

 

5 launches on just drag radials, and my axles are bent - on a stock GSL-SE rear.

 

The rears can handle a lot of HP, its just a matter how you use it! Guys over on this side of the pond has built 450 HP RX2 with original 616 (Banger edition of the RX2) rear axles that were welded (poor mans LSD ) The axles actually held up to a lot of abuse with normal street tires on the car, but as soon as they got slicks, it would break.

A lot of guys are now using Volvo 240 R sport rears, they can handle up to 500 BHP, and aint that hard to fit.

 

A fellow Aussie on this forum had about 5-600hp running through a Series 2 rear end with factory race LSD for years with no problems. Like the other guys said it's all in how you treat it.

 

well I am glad that I got some response to this old thread I am going to stick to my orginal plan of the 8.8. because the car is going to be a drag monster with minimal street driving.

 

In my 81 GSL i replace the "chunk" or "pineapple" twice - but alway w/ a used part. The rear end in my street ported 7 (pictured) has 130 original miles on it & is strong. BTW: I put Amsiol in both.

http://members.cardomain.com/snapshot1

 

I've put an 8.8" in mine (will be around 450RWHP when done) simply because I don't want to have to worry about breaking it. Peace of mind, if you will.

 

A while back people were saying thatthe 8.8 was good enough and that it weighs considerably less than the 9. Also the original posting was feb of 03.

 

But when you go quicker than (10.49?) you need to install C-clip eliminators, which retain the axles at the bearing end instead of inside the differential, so if you break an axle you don't lose a wheel and your brakes.

Problem is, C-clip eliminators don't really cotton to side loading, so they're not a good idea for anything other than drag racing and occasional light street use. Also they tend to leak.

I've watched axles break on 8.8's, Chevy 10-bolts, and one Ford 9". The one with the 9" was the only car that was able to drive itself back on the trailer. (Gotta love having a spool) Fortunately all breakages happened in the burnout box/on the start line so there weren't any nasty accidents.

 

Yeah for project torque, im gonna use the stock housing, with a torsen diff and 4.44 ring and pinion set. I'll let you guys know how it holds up. If it doesnt i'll be going to a ford 8.8"