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Which Models have the LSD 1
Posted 18 May 2001 - 11:39 PM
Posted 19 May 2001 - 05:56 AM
Posted 19 May 2001 - 12:44 PM
Posted 19 May 2001 - 01:29 PM
My 86 XT 4wd Turbo has a 3.70
My 84 Turbo (not sure if ANY of the 84 models really ever came from the factory with a LSD) has a 3.70.
The reason I say the turbo has a higher likelyhood is the gear ratio on a majority of LSD's is 3.70. Hardly any 3.90's exist except what was created/regeared. The turbo's tended to have a 3.70 tranny.
Yes ALL RX's have the LSD. 2 and 4 door.
Posted 19 May 2001 - 09:18 PM
How do you re-gear a 3.700 to make it a 3.900
I've got a spare 3.900 open, now I just need a LSD...
Posted 19 May 2001 - 11:41 PM
The basic idea is to take apart both diffs keeping all the components clean and with the diff they came from. Then you remove the ring gears from both diffs and swap them so you end up with the 3:9 ring gear on the LSD assembly. Once the LSD assy is mated to the 3:9 ring gear you then need to stuff them back into the 3:9 diff case and this is where you need to get out the power tools. The LSD assembly is a bit bigger than the open diff assy. What you do is look at the inside of the 3:7 diff case to see how Subaru carved away a bit of the case to allow the LSD guts to fit in there. Carve away a bit of steel on the 3:9 case and you're ready to put those LSD guts in there...and it's still a very tight fit. I used a 4" angle grinder to make quick work of the metal removal. The hard part is not getting any of the metal chips and junk into the ring gear. Use whatever method you like just keep it clean in there and then clean it some more with brake cleaner when you're done. Reinstall the stub axles and you should be done. The bolts on the ring gear and stub axle all get red locktite. Replacing the side seals is optional but recommended.
Special tools needed:
*Star socket for the stub axle bolts...is it a T-10?
*Large bench vise for holding the diff assemblies while removing the ring gears.
*Die grinder or angle grinder.
Ok, so what did I leave out or get mixed up? Confusing if you haven't already done it yourself?
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