Ok I have an 83 disc brake rear my question is if I have the axle ends redrilled to 4-114 will the gslse rotors and calipers bolt up to the axle housing?

 

I'd be surprised if nobody has tried this. Other than the concern that the extra four holes could weaken the flanges there's the issue of getting the holes exactly on center. If they aren't you'll have some serious vibration problems.

I'd check to confirm if the axle flanges on your '83 are of exactly the same diameter and thickness as the SE flanges. If they are, you should be able to mount an SE brake rotor firmly onto the axles and use the rotor's bolt pattern as a template for drilling through the flanges.

As for the calipers, I'm not certain but if I recall, the main difference is that the SE calipers are wider to accomodate a wider disc. Otherwise they appear to mount in the same manner.

 

-SE axles are longer between the bearing and flange. Therefore, the -SE rotors would have too deep a dish to work on non -SE axleshafts.

 

Correct.
The SE axles are wider and the rotors stick out furthur to counteract the high negative offset 14" wheels that came on the SE.
Running the same wheels(I had 110MM/114MM dual pattern wheels),one will see about 3/4" outward push on each side when swapping a standard axle assembely for and SE axle assembely.

 

Damn, so much for that angle. Which now begs the question "can SE axle shafts be used with the non-SE 3:95 diff?"

 

WHY!!!! Why re-drill? There are tons of se's to rip the entire rear diff out of. There aren't as many 83 disk rear ends with lsd's!

I'd kill someone for that rear end! (not cause I want it so bad, just cause it's so much cheaper than buying it).... >.>

 

[QUOTE=~Nector_Rivera~]

WHY!!!! Why re-drill?

Relax. I was just speculating. Besides, it has since been posted by someone else that due to the differences in the flanges this route is not an option.


There are tons of se's to rip the entire rear diff out of. There aren't as many 83 disk rear ends with lsd's!

Maybe in Joisey(?). But nearly everywhere else '81 to '85 GSLs (all of which came with rear discs and a 3:95 LSD) outnumber '84 to '85 GSL-SEs (with their 4:10 final drive ratio) several times over. But agreed, the more obvious choice if a complete SE suspension (front and rear) is available it's best to do a complete suspension swap.

 

You can use 84-85 SE axles with non SE differentials,but they have to be all 84-85 parts because of the axle shaft and bearing changes made in 84.
Due to the differences in axle lengths,the brake rotors and calipers must match the axles used....either GSL or SE.
The pumpkin makes no difference whether its LSD or not,any gear ratio will work,any carrier will work.....so long as its the right style....either 79-83 or 84-85.The earlier models had small axles and bearings,the later had larger axles and bearings.
There are also 4 different kinds of rearend housings.
79-83 drum brake/small bearing
81-83 disc brake/small bearing
84-85 drum brake/big bearing
84-85 disc brake/small bearing.....includes SE