LSD rear with ABS, no ABS to get LSD?

[badboyr66]

Ok here we go, I know that on 90- 91 awd DSMs if you had ABS you did not have rear LSD. But if it was a 92 or newer you can have both. I have a 91 TSI with ABS and I want a LSD rear end...But I was told the LSD rear will not match the gear ratio, plus my ABS will not work right. Anyone know for sure?

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[Cirus_93TSI]

im not sure if u can put an lsd rear in ur car, but mine is a 93(build date oct 92), i have lsd instead of abs, i believe that u can still only have 1 or the other as a factory option, regradless of the year
now im not saying u cant put it in ur car with the abs, i dont know if u can or not, but all 1g cars iv seen have 1 or the other, i have yet to see one with both abs and limited slip from the factory, and when looking to buy my car i looked at dozens of 1g cars, (mostly 92-94)and not a single one had lsd and abs, they all had 1 or the other

if it really comes down to lsd or abs, junk ur abs system, mine doesnt have it and i have only locked up the brakes once, and that was the other day during one of the worst rain storms of recent years in my area, i had to slam on my brakes while changing lanes on the highway to get to my exit, if i wasnt somewhat sideways when i slammed on them they wouldnt have locked, it was really more of a hydroplane then a brake lock up

 

[badboyr66]

My friend has a 93 with both ,i can care less bout the ABS thing...I want to know if I put on LSD will the ratio be the same

 

[pneumo]

I'm pretty sure the rear diff gearing was different between auto trannies and manual, but I could be wrong. But anyway, you can put a LSD rear diff on your car, there are plenty of folks who have done a 3 bolt to 4 bolt conversion, which als includes LSD.

BTW, my 92 AWD has both LSD and ABS.

 

[badboyr66]

ya I was more worried about the ratio and how to identify them by looking at them

 

[pneumo]

I don't think there's a way to tell from looking at the diff case. Maybe just pop the rear cover off and count the # of teeth on the gear. Gear ratios can be found at VFAQ.com in the tranny section.

 

[pneumo]

I didn't think that post above made it through, so I went to VFAQ.com and looked it up.

I can think of two ways now. Pop the rear cover off and count the # of teeth on the big main gear; manual tranny 1G has 39 teeth, auto tranny 1G has 43 teeth. Or turn the input flange and count how many times the diff goes around. MT diffs have a 3.54:1 ratio, so it would take 3.5 turns of the input shaft to make the axles turn once. AT diffs have a 3.3:1 ratio.

 

[Topper348]

I'm pretty sure the rear diff gearing was different between auto trannies and manual, but I could be wrong. But anyway, you can put a LSD rear diff on your car, there are plenty of folks who have done a 3 bolt to 4 bolt conversion, which als includes LSD.

BTW, my 92 AWD has both LSD and ABS.

Ahh but what about a 6-bolt? Mine is an early 92 with ABS, LSD, and 6-bolt/4 - bolt combo. I had to upgrade to 93 brakes though . I think its already been said, but an auto LSD will not work on a 5spd. or vice versa. I belive the ABS will work though after a 3 to 4 bolt conversion....i dont see why not. Either way if you plan on going to LSD, trash the ABS. Its complete frekin garbage on a 1G it will get in the way of everything you ever want to do to your car. Ever tried removing an engine with the tranny still attached? Much harder when the tranny has to come out the bottom. Even IC piping is 20 times harder with ABS...TRASH IT!!

sorry.. had to vent

 

[badboyr66]

Ya, I am junkin the ABS, it is like a big batch of toilet bowl stew. Besides removing the ABS unit and renunning the lines, is there anything else I should do?

and from what I see here in my factory broschures, 80-91 no ABS and LSD

92 up you can have both

Plus I scored a entire 4 bolt rear for $62

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[ASZRAEL1266]

You can tell the lsd rear from a non lsd rear. The end of the pumpkin will have a tag on it or it will be made into the casing. It will tell you if its lsd or not. The gears for the lsd rear and non lsd rear are the same. My car came stock with no lsd rear i snaped a 3 bolt axel and put in a lsd 4 bolt rear and the teeth count was the same. Even the vfaq doesn't list any diffrence. I belive the problem with abs and lsd rear was the fact that we are AWD. When the tires lock up and the lsd kicks in there will be times were the fronts will be lock and the rears wont. I don't see how a split second can make much of a diffrence or hurt the center diff much but that is just what i think, and have read as to the reason why you get one or the other.

 

[Topper348]

Plus I scored a entire 4 bolt rear for $62

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I helped my buddy pull a 4-bolt for $50

 

[badboyr66]

Ya but we got a good motor with a head, and a tranny, including the 4 bolt , we spent under $200 So..

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[Topper348]

Ya but we got a good motor with a head, and a tranny, including the 4 bolt , we spent under $200 So..

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yeah well I got a 6bolt complete engine PLUS an extra head for $150. And both heads are good and the cylinder walls are like mirrors. BOO YA! (man is it just me or are DSMs some really cheap ass cars??)

 

[Topper348]

Oh and my OTHER friend (who owns a N/T soon to be turbo) Got him a 6bolt complete with AWD tranny for $100, but the engine hasnt been opened and I dont have a good feeling...

 

[pianoman]

either way its a lot harder to lock up all 4 tires on an awd anyhow. this is my first awd with no lsd. my 90 gsx had a lsd. oh yeah heres a good deal. this guy was the second owner of a 91 gvr4 had 80,000 sold it to me for 450 bucks. needed an ecu. sold it a month later for mad profit..

 

[Topper348]

DAMN....I accept defeat...

 

[pianoman]

it was a lucky catch, same with my 3inch turbo back, stainless steel, magnaflow muffler, all welded as one piece so no exhaust leaks. price was $300.00 cost me 125 plus a supra side mount i had sittin around. oh yeah when i bought that supra side mount i paid 200 and that was for the supra side mount, dejon tool 2.5 uicp, 3inch intake pipe and the lower piping for the ic. i sold that ic for 175.