Shimming an R200 or J30 vlsd

[UNISA JECS]

Just felt like adding some other pics I though would be nice to include on this thread:

2003 350z

[SirSilvia]

nice I can use that diagram as a general reference when putting the new shim.
I bought 38424-40F82 and 38424-40F83
I'm gonna go try the smaller one first for a while

[let5l1de]

Originally Posted by UNISA JECS

Just felt like adding some other pics I though would be nice to include on this thread:

2003 350z

To compliment your illustrations with a j30 vlsd...

btw: changing the shims to thicker or doubled up shims only increase the gear engagement on the internal spider gears ( 4 of them) which may be the blame for a ratcheting rear diff. This noise goes away once you have worn new patterns into the side and spider gears. in other words, Grinds The Metal and increases the friction/grip.

when you take the tolerances out of the factory gear setup, who cares what side the shims go on. should be the same long term result.

it does make a cheap 1.5 at the expense of a long living rear diff...

your choice.

~m







EDIT: this ring gear is from a 240sx 49:12. j30 come with 47:12

[niteridaz503]

Hey guys quick question, this is my 1st time cracking a diff open and im not to mechanically inclined so as im putting the diff back together i cant put the shafts that go into the VLSD back into place i can get one side in but not the other. Does this maybe mean when i put the 2 phillips screws back into place i unaligned the ring gear some how? any info would help alot thankz....

EDIT UPDATE:
Its freakin awsome just did a few figure 8's and its good to go. I had some issues with the splines because the viscous coupler splines ended up shifting to where the shafts that go into the VLSD wouldnt line up but re-did everything and its really worth it and a great mod by far and recomend it to anyone who cannot afford a fancy 1.5 or 2 way like me....

[240SilviaX]

Originally Posted by let5l1de

EDIT: this ring gear is from a 240sx 49:12. j30 come with 47:12

I see that you used the 240sx 49:12 ring gear on the vlsd. I still have a KA and want to go up to Big Bear (7000ft) so I want more torque going up the mountain.. I got a J30 diff from the yard and want to take the vlsd add a shim and swap the ring gears and install it into my 240sx carrier. Do to the the J30 47:12 ring gear being fatter the vlsd would be shimmed (bearing and race shims) over like the open (240sx skinny ring gear) diff. My question is once the diff is installed will the axle output shafts line up with the snap rings in the vlsd? or would they be not lined up due to the vlsd being shimmed over like the open diff because of the skinnier ring gear?

[koukistylejdm]

Originally Posted by UNISA JECS

Just felt like adding some other pics I though would be nice to include on this thread:

2003 350z

Ive did that mod with the thikiest shim on top of the existing one and we had to ask a machine shop to reproduce thinier shims for the one on #21 in that pic just as an info..... 3 years rocking on this, and the ratcheting sound never stopped, still looking strong imo and def the best 4$ i have spend in my life