j30 rear swap

[bsdragon240sx]

for anyone whose done a j30 swap in an 89sx please help!!! the studs and stock bolt holes dont line up!!

[xorro]

u can use the lsd from the j30 not the housing it will fit in the s13 housing but dont forget to replace the shaft seals and use lock tight on the gear ring had a friend being a dumass and didnt lisen to me the first time and went through 2 housings

[xorro]

u can use the lsd from the j30 not the housing it will fit in the s13 housing but dont forget to replace the shaft seals and use lock tight on the gear ring had a friend being a dumeass and didnt lisen to me the first time and went through 2 housings

[LayNLow240]

If you must use the whole pumpkin, swap out the rear covers, and I hope you grabbed the 2 front bolts from the J30, because your 240 ones won't be the right size.

[Fla240sx]

i think the axles are different too, get the J30 axles to go along with the Diff

[Scuffed_ChukiCoupe]

i thought it was a direct bolt on affair? I thought u just swap the rear housing with the j30 axle that matches with the 240's axels. Im looking to do this swap so i need as much info as possible.

[Scuffed_ChukiCoupe]

btw im reffering to my 91 coupe

[homeslicej2]

Direct bolt on depends on what year J30 diff you get and you do have to swap the covers if you install one on an S13. Check the 240sxtech pages for more info.

[Scuffed_ChukiCoupe]

I went to the 240sxtech section searched for 3 pages, then searched nicoclub itself. I didnt really get anything. Im assuming you know about this stuff so if i swap the right year j30 lsd to my s13 coupe all i have to change is the diff cover?

[homeslicej2]

There are 2-3 articles in the tech section about diff swaps, but i understand they can be hard to understand.

Here is some help from KA24DEdevelopment.com If you own an S13 (89-94) you will need to swap the rear cover off your stock open diff onto the VLSD:The S13 uses a different bolt pattern (4 bolts) than the S14 (2 bolts) on the rear cover...

You will also need 2 longer mounting bolts for the S13 chassis, and 2 large washers for the front mounts...to be used with the large bushings on the front mounts. They are M12 X 1.25 thread/pitch, 85mm long.

The stock S13 front mounting bolts are not long enough for the J30 and S14 diff mounts.

And I've seen more than few diffs drop out from the front mounts by not using washers - They need to be ~1.5" diameter or so, and 1/8" thick.

To overcome the .75" extra length at the nose of the diff you can:1) Install it and see if your driveshaft and transmission mounts have enough play to soak up the extra length.

2) Get a driveshaft from an ABS equipped 240SX...it's .75" inch shorter.

Mods, sorry for referencing another site, but just trying to help a fellow NICO member out and not plagarize.