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 93 3rd member swap to Gen 1 LSD
#953786
07/14/09 10:26 PM
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Joined: Jan 2007
Posts: 211
OP
Wheeler
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Looking to swap my 3rd member with a LSD. Most Gen 1's I come across at the yards have LSD's. I've done some digging in the archives but most discussions talk 'bout Gen 1 and 3.5 Gen 2's. Not much on the 92-93 compatibility, in my travels anyways. I'm wondering if Mitsu. had some fun with different diff. sizes for the early Gen 2's and how different they might be with the Gen 1's. I promise to spend your 2 cents.
'91 RS, '93 SR
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Re: 93 3rd member swap to Gen 1 LSD
[Re: blinkerbox]
#953787
07/14/09 10:46 PM
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Joined: Jan 2007
Posts: 211
OP
Wheeler
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My diff. is 4.875. Which I believe is pretty standard in the Gen 1's, no? So I guess I'm just wondering if the driveshaft bolt pattern is similarly spaced and if the axle shaft spline is the same.
'91 RS, '93 SR
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Re: 93 3rd member swap to Gen 1 LSD
[Re: blinkerbox]
#953788
07/14/09 11:19 PM
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Joined: Feb 2000
Posts: 3,269
Roll Me Over
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The 92-93 rear ends with disk brakes are different from the gen 1 drum brake ones, Yes they will bolt in but The Gen2's have a thrust block in the center of the diff that sits between the axles, and reqire a different axle lenghth..Ask Lordtrunks what happens if you do this. <img src="/forums/images/graemlins/lol.gif" alt="" />
You might be able to add or remove the thrustblock from one diff to the other, but that would be speculation on my part. Someone else will havew to elaborate on that one.
99 Gen 2.5, fixing blown head gasket
89 SWB- 33's, ARB Front locker, SR rear locker/axle, SR F brakes, winch, WST Offroad Armor all Around, 2.85 Aussie T-case Gears (SOLD)
Sold: (2) 95 SR's, 86 SWB, 90LWB, 91 LWB
-Can Change a timing belt in my sleep..
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Re: 93 3rd member swap to Gen 1 LSD
[Re: blinkerbox]
#953789
07/14/09 11:28 PM
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Joined: Feb 2000
Posts: 3,269
Roll Me Over
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My diff. is 4.875. Which I believe is pretty standard in the Gen 1's, no? So I guess I'm just wondering if the driveshaft bolt pattern is similarly spaced and if the axle shaft spline is the same. Also you'll find that the majority if not all the gen 1 V6 to have 4.62 in the diff. Mitsu went to the 4.88's in 92 probably due to the added weight of the gen 2 (my best guess)while keeping the same 3.0 engine. Once the 3.5 and 3.0 24V were introduced they went back to 4.62 in the diffs.
99 Gen 2.5, fixing blown head gasket
89 SWB- 33's, ARB Front locker, SR rear locker/axle, SR F brakes, winch, WST Offroad Armor all Around, 2.85 Aussie T-case Gears (SOLD)
Sold: (2) 95 SR's, 86 SWB, 90LWB, 91 LWB
-Can Change a timing belt in my sleep..
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Re: 93 3rd member swap to Gen 1 LSD
[Re: justice]
#953790
07/14/09 11:31 PM
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Joined: Jan 2007
Posts: 211
OP
Wheeler
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Also you'll find that the majority if not all the gen 1 V6 to have 4.62 in the diff. See you done learned me somethin' already. So chances are despite the possible similarity in axle shaft spline count and driveshaft mating, the thrust block is the issue?
'91 RS, '93 SR
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Re: 93 3rd member swap to Gen 1 LSD
[Re: blinkerbox]
#953791
07/14/09 11:37 PM
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Joined: Jan 2007
Posts: 211
OP
Wheeler
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And I suppose I don't want to revert back to the 4.625 ratio. Didn't the early Gen 2 3-liter SOHC base trim lines have the 4.625 also? Did Mitsu. do an LSD on the Gen 2?
Last edited by pvdub; 07/14/09 11:38 PM.
'91 RS, '93 SR
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Re: 93 3rd member swap to Gen 1 LSD
[Re: blinkerbox]
#953792
07/15/09 12:49 AM
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Joined: Dec 2008
Posts: 659
Rock Warrior
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if you look on car-part.com, you can get an idea of what was offered in certain years.
i did a search on 93 r&p and got this.
Rear Axle, (3.0L, 6 cyl), 4.63 ratio
Front Axle, (3.0L, 6 cyl), MT
Front Axle, (3.0L, 6 cyl), AT, 4.63 ratio
Front Axle, (3.0L, 6 cyl), AT, 4.88 ratio (SR)
Rear Axle, (3.0L, 6 cyl), 4.88 ratio (SR)
so it looks like you have 2 gear ratios that are out there. if you look at axle-rear diff, it shows some locking diffs available, but i did not look it up for your area.
'88 Raider. 2.6L dead...2.4L swap in progress, AT, 33's, 2 bouncy seat,AC, CC, 2.25 exh, 2" Tbar, 2" BL, rear DB, rear LSD,4.90's, SW hubs,gen2 uca's, KYB shocks, snorkel, elec fan, MSD.
'99 chev k3500 crewcab
'15 Subaru XV
'03 BMW i325
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Re: 93 3rd member swap to Gen 1 LSD
[Re: zarktheshark]
#953793
07/15/09 01:10 AM
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Joined: Feb 2000
Posts: 3,269
Roll Me Over
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Yes, but the magical diff he needs (or wants) is a gen 2 3.0 4.88 diff WITH LSD. Probably not going to find it, very rare if not non existant in the US. Install locking diff (entire assembly) from a later 95/96 SR and call it a day. OR: Do some research on the "thrust block" and install LSD out of gen 1 V6... <img src="/forums/images/graemlins/kewl.gif" alt="" />
99 Gen 2.5, fixing blown head gasket
89 SWB- 33's, ARB Front locker, SR rear locker/axle, SR F brakes, winch, WST Offroad Armor all Around, 2.85 Aussie T-case Gears (SOLD)
Sold: (2) 95 SR's, 86 SWB, 90LWB, 91 LWB
-Can Change a timing belt in my sleep..
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Re: 93 3rd member swap to Gen 1 LSD
[Re: justice]
#953794
07/15/09 01:45 AM
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Joined: May 2001
Posts: 4,079
Roll Me Over
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Gen 1 diffs have thrust blocks that keep the axles from floating around gen 2's have longer axle shafts that butt into each other and there diffs don't have thrust blocks. Really bad things happen with out thrust blocks REAL BAD THINGS <img src="/forums/images/graemlins/shiner.gif" alt="" />
89 2 dr turbo diesel
89/88 "Backwoods sas"
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