LSD for 7.5

a.graham52

a.graham52

Apprentice
Oct 19, 2017
95
27
8
#12
I suggest the Detroit truetrac, they have the 26 and 28 spline versions. From what I've read you can upgrade to 28 spline axles if you don't already have them, drop in replacements.
does this mean i could go find an s10 axle and pull carrier and axles? then transfer over my ring gear?
 
xylorex

xylorex

Not-quite-so-new-guy
Aug 2, 2018
21
18
3
New Orleans, LA
#13
I haven't verified this, but I'm pretty sure the s10 axles will not be the correct length

What I mean by drop in replacements, is that you can buy aftermarket axles for your application with 28 splines (mine are Moser)
 
Last edited:
DRIVEN

DRIVEN

Geezer
Apr 25, 2009
5,106
3,963
113
Owyhee County
#14
80s Fbodys also came with 26 spline clutch type limited slip carriers...if you don't want Gov-Loc. IIRC I pulled mine from an '87 Camaro.
 
64nailhead

64nailhead

G-Body Guru
Dec 1, 2014
812
882
93
Upstate NY
#15
does this mean i could go find an s10 axle and pull carrier and axles? then transfer over my ring gear?
Yes, sort of.

'Transfer over my ring gear' - this can be a somewhat tricky unbolt from one diff and bolt to another. You can't swap a between 2 and 3 series diffs. I.e. if you have a set of 3.08 gears in your car and you pickup a diff from an S10 with 3.42's, then that's not going to work. Next is that you really need to check the setup when swapping bearings and diffs. It might work out just fine, or be close enough, and your HP/TQ will dictate how long an incorrectly set up gear pattern will last.

'does this mean i could go find an s10 axle and pull carrier and axles?' If you check the setup and have the correct differential series, then yes if you make a couple of spacer plates to bolt between the axle flange and backing plate. The issue is that the S10 axles are just a little less than 3/8" of longer. But I've done this and it was a darn cheap and reliable upgrade with complete junkyard parts.

I've described this setup before, but here it goes again, find a newer 2WD S10, 94/95 or newer, for the 28 spline axles and a diff of the same or newer generation. Or better yet, find a 4th Gen Camaro Torsen posi unit, as I did. Between the Torsen, junkyard S10 axles and gears, and new bearing kit I was less than $300 into it. It took me a couple of hours to make the spacers out of 1/4" steel plate - it will test your cutting, drilling and grinding skills - but more perseverance than expertise - lol. This setup is now in the basement as our spare if and when the 8.5 goes kaflooey, but it made it through a full summer of well over 400 whp burnouts and driving - about 7k miles. It looks like we just put it together when it was removed.

Of course you could drop the $260 on a set of Moser axles and never worry about them breaking again - the gears will explode in a 7.5 before you'll break one of their axles.
 
joesregalproject

joesregalproject

Comic Book Super Hero
Nov 4, 2012
2,713
2,201
113
Pittsburgh, PA
#17
What kind of power can a 7.625" actually take with 28 spline Moser axles and a good limited slip carrier? I'm gonna have to address my rear axle before I actually start driving the car (the 2.41 peg legger isn't gonna work) and I'm kinda just weighing my options.
 
DRIVEN

DRIVEN

Geezer
Apr 25, 2009
5,106
3,963
113
Owyhee County
#18
There's a lot of pretty fast LT1 and LS1 Camaros running around with them.
 
307 Regal

307 Regal

Royal Smart Person
Oct 21, 2009
1,545
559
83
Northern Indiana
#19
What kind of power can a 7.625" actually take with 28 spline Moser axles and a good limited slip carrier? I'm gonna have to address my rear axle before I actually start driving the car (the 2.41 peg legger isn't gonna work) and I'm kinda just weighing my options.
So far, 216bhp and ~250ft-lbs, paired with a Trickflow diff cover and Cooper Cobras. Also, many burnouts and at least 5 race days on medium comp track slicks. Been about 7 years I think.
 
64nailhead

64nailhead

G-Body Guru
Dec 1, 2014
812
882
93
Upstate NY
#20
What kind of power can a 7.625" actually take with 28 spline Moser axles and a good limited slip carrier? I'm gonna have to address my rear axle before I actually start driving the car (the 2.41 peg legger isn't gonna work) and I'm kinda just weighing my options.
On street tires, well over 500hp On slick - close to 500. A local was made a lot of run at just over 6 seconds with a 250 nitrous shot on an LS1 before he began twisting off factory axles.
 

Please support GBodyForum Sponsors

Classic Truck Consoles Dixie Restoration Depot Mike's Montes P-S-T Southside Machine Performance UMI Performance

contact [email protected] for info on becoming a sponsor

copyright ©2018 Ripp Technical Services, All Rights Reserved.