240SXer wrote:What's involeved in putting an LSD into a 95 240? I want to do it, but I have no clue what I need. Or what I need. Which LSD is good for drag racing? That's mainly what I want. is that the VLSD?
David.
Depends on what kind you get. A VLSD with housing should for the most part bolt right up depending on what car it came off of. Any 240sx VLSD will bolt up except that you may need to use your original diff cover if using a S14 diff in an S13 and vice versa. A 95+ J30 diff will also bolt up. Both of these have a longer nose for the ABS sensor and may cause problems with the rear transmission seal. Some have had this porblem while some have not. I opted to use a shorter driveshaft. A Normally aspirated Z32 diff will also bolt up, except you need the output shafts for the VLSD 240. At about $150 each, this is not the cheapest option for a VLSD. But the Z32 diff does not need the use of a shorter driveshaft since the ABS sensors are on the output shafts instead of the nose.
If you go clutch or helical, you need to crack open the casing and replace the diff section. This requires preceise measurements and correct shimming so that the pinion and ring gear line up correctly. If you don't, the gears may wear prematurely or fail. I believe Kaaz requires the use of VLSD output shafts(both from one side). I think they can provide them, but not sure if it's extra. I don't know if you need anything else for other clutch types or helicals.
For drag racing, all will work better than no LSD. Depends on a lot of factors. For extreme drag only cars, a spool or welded diff would be best. Then the Clutch or helical. Clutch types can typically be adjusted by clutch plate configurations. Helicals can be tuned by using different gear angles, but I'm not sure how willing a manufacturer would be willing to do a custom set-up.
VLSD will work, but is rather weak for extreme applications. Still better than an open diff though.