LSD swap questions

[idosubaru]

There were two shim plates under one bearing cap (but not the other). I assume the shims stay with bearing cap which stays with the case/ring gear. Right? Basically just swap the chunk and everything else stays together.

 

There was also a large o-ring under the caps. Do you guys generally add a coat of sealant to the oring or not?

 

Oh and really important do you guys use the 3.7 LSD plate or the 3.9?

Edited January 18, 2010 by grossgary

[Turbone]

Retain everything from the LSD chunk, except the ring gear. You need to use the 3.9 gear. I dont recall using any sealant when I did mine and I used the 3.7 cover plate. I just changed the 3.7 to 3.9

[monstaru]

NO sealant........it will ruin your side lash.the lsd swap right up is still around ya know.:grin:cheers,brian

[idosubaru]

I read the writes up they're saved to my hard drive. I didn't see mention of those orings or metal gasket things. Curious what those metal things are for.

 

My ring gear used the larger bolts and the LSD chunk smaller, so I had to do a lot of drilling what a PITA.

 

Now that I have metal shavings everywhere - any chance this LSD chunk is worth installing? Is there any chance of flushing any metal out from all the nooks and crannies inside? I had it covered and all, but not good enough. Sprayed it down, will spray some more. Doesn't seem like there's anyway to get all that metal out from inside though.

Edited January 18, 2010 by grossgary

[Turbone]

I dont know what to tell you about the shavings, I guess try and clean as good as possible.

The metal pieces are shims, they are for backlash I believe.

[GeneralDisorder]

The thin metal "gaskets" are shim stock spacers. They are almost certainly metric and are used to set the R&P gear lash. If you change the case, gears, bearings, or any combination of these items you need to reset the clearances for optimal lash settings.

 

GD

[monstaru]

if you are not confident in using that unit, i will gladly take it . and yes , those are shims.they are utilized to "center" the ring gear to the pinion.....

 

cheers, brian

 

by the way, next time you have to drill one again( i have never had to drill one, so it is weird that a bunch of folks have)i would suggest using some duct tape with some newspaper to cover the innards.

[Dantes Inferno]

To get the junk out use compressed air and a vacuum. The air should whip everything around pretty damn good if you got enough pressure and a good vacuum will yank anything that floats by. Kinda like when the dentist uses the water and suction hose at the same time.

[idosubaru]

Right on compressed air, haven't done that yet. Thanks.

 

All of the ones I have have 2 shims on each side bearing plate. Anyone seen other variations? Just curious.

[The Beast I Drive]

Ive seen 3 on one side and 2 on the other, or 1 on one side 2 on the other, etc. They vary from each rear end because not all of the parts are machined to the exact same dimension every time, due to tool wear, different manufacturing plants, etc. Whatever shims you find must have been what was needed to set it up right...

 

-Bill