How Can I Tell If I Have An LSD? [Merged 7-8]

[candela]

sorry don't mean to double post, but this should have been here in the first place, doh... QUESTION- how do you tell if there is a rear lsd on the car?

 

[evanspears1]

woo, I got one of the somewhat rare 91's with an lsd...kool, I dont like abs anyhow...

 

[1gcrazy]

Wow...I feel like an idiot. I guess you learn somthing new everyday...
I wonder if my car is 4 bolt...hmm

 

[AndrewD5418]

woo, I got one of the somewhat rare 91's with an lsd...kool, I dont like abs anyhow...

The abs on 90/91's is very shitty to begin with. It'll start to engage on the slightest pressure on the pedal.

 

[Sp1kE]

my car was a mess when i got it and the driverside stickers were all ripped up.

where is this sticker on the diff??

 

[mitsured420]

This might sound like a noob question,but isnt there a center and a rear diff?witch one has lsd? i have the orange sticker but a different trans.Did the lsd go with my old transmission?

 

[Black91TSiAWD]

This might sound like a noob question,but isnt there a center and a rear diff?witch one has lsd? i have the orange sticker but a different trans.Did the lsd go with my old transmission?

The LSD is in the rear differential.

 

[steve]

wonder if my car is 4 bolt...hmm

Not unless somebody swapped it in. The 4 bolt rear diff didn't start shipping until the '92 model year cars and your profile says you have a '91.

This might sound like a noob question, but isnt there a center and a rear diff?

Yes. All of the center diffs had a VCU (Viscous Coupler) in the trans standard. We have been talking about the rear diffs and that some (since it was an option) had another VCU in them making them LSD.

Steve

 

[1gcrazy]

Not unless somebody swapped it in. The 4 bolt rear diff didn't start shipping until the '92 model year cars and your profile says you have a '91.

Yes. All of the center diffs had a VCU (Viscous Coupler) in the trans standard. We have been talking about the rear diffs and that some (since it was an option) had another VCU in them making them LSD.

Steve

Holy crap. I've got the LSD sticker on my inner door jam. What does this mean? 3 bolt LSD? Does that even make sense to put in my 4 bolt rear end? Are 3 bolt rear ends even worth anything?

 

[AndrewD5418]

3 Bolt are worth having. But 4 bolt is stronger.

 

[mitsured420]

Thanks steve for clearing that up.

 

[Needsoles]

How can i tell if my fwd tranny is a LSD. i just got this tranny for my car and have not put it in yet. any Advice?

 

[absolute_DSM]

Look where the axles go into the tranny.

Spin that gear and check the other side where the other axle would go. If the gears are spinning the same direction you have LSD, if they are spinning opposite, you dont.

 

[98mitsuGSX-SD]

Not to be so blunt but it's the differential that would make it a LSD not the transmission.

 

[meliketoball]

Not to be so blunt but it's the differential that would make it a LSD not the transmission.

In transaxle's, the limited slip is IN the transmission.

If you have your axles out already, you can stick them in the tranny, hand turn one and if the other axle spins the way the hand turned one is spinning, it's a LSD and if it isn't the one being hand turned will go one way while the other will go the opposite.

 

[Afroclipse]

just do a long burnout and see if you leave two marks or one, yes primitive but it works.

 

[My1GLaser]

If I am correct, look thru the axle shaft input on one side...if you can see thru to the other side then it is an "open differential." If you cant see thru at all, it is because the LSD is in there b/w the axle shaft inputs. Good luck, hope you have one. I was running 24 psi on an EVO16g and first gear was useless. And the SOB would break loose at 80mph if I punched it in third. This was completely stock suspension though.

My advice would be that if you do not have an LSD, then put one in while you have it out. It is a sizeable task depending on your mechanical ability. If your HP goals are not over 400whp, then look into a SBR LSD insert. They have gotten good feedback from the guys on here. I am going to put one in a 1g GST I am building for a friend next month. He will be running an EVO16g at 22 psi, so he will need it. They are about $200 from slowboy. There are a few other insert manufacturers, but I have read more neg. about them then the SBR insert.

You could look into a Quaife LSD if you have the $1200.(I think) There is also another company that has gotten good reviews on their LSD lately. I think it was Karking for about $750. Kaaz makes one, but I don't know anything about theirs. These are "true" LSDs, which is why they cost so much more. The inserts are basically plates with springs b/w them that exert force on the spider gears to keep each wheel spinning at the same speed. They work fairly well from what I have researched. Probably not a good idea if you plan on lots of track time and you launch hard alot. Thats why they have the "true" LSD, but you pay for it...

 

[ILLegit420aT]

If I am correct, look thru the axle shaft input on one side...if you can see thru to the other side then it is an "open differential." If you cant see thru at all, it is because the LSD is in there b/w the axle shaft inputs. Good luck, hope you have one. I was running 24 psi on an EVO16g and first gear was useless. And the SOB would break loose at 80mph if I punched it in third. This was completely stock suspension though.

My advice would be that if you do not have an LSD, then put one in while you have it out. It is a sizeable task depending on your mechanical ability. If your HP goals are not over 400whp, then look into a SBR LSD insert. They have gotten good feedback from the guys on here. I am going to put one in a 1g GST I am building for a friend next month. He will be running an EVO16g at 22 psi, so he will need it. They are about $200 from slowboy. There are a few other insert manufacturers, but I have read more neg. about them then the SBR insert.

You could look into a Quaife LSD if you have the $1200.(I think) There is also another company that has gotten good reviews on their LSD lately. I think it was Karking for about $750. Kaaz makes one, but I don't know anything about theirs. These are "true" LSDs, which is why they cost so much more. The inserts are basically plates with springs b/w them that exert force on the spider gears to keep each wheel spinning at the same speed. They work fairly well from what I have researched. Probably not a good idea if you plan on lots of track time and you launch hard alot. Thats why they have the "true" LSD, but you pay for it...

i think the kaaz is $749 for you guys...but deff worth it, any lsd is better than none at all

 

[Needsoles]

I spun one side and the other side spun the opposite way. No LSD so i might go and buy one while the tranny is out

 

[dirtbike_79]

I recently bought a 1992 Talon TSI fwd and just finished rebuilding the engine. I didnt look into the tranny at all so I do not know what it has, but as far as I know the car was completely stock when I bought it. Anyways I decided to see how well it could do a brake stand the other day and it did "two tires of fire" so to speak. Wouldn't this meen the car has an lsd, what do you think?

 

[qiklitltsi]

It doesnt mean you have an lsd, If its stock you most likly dont have one unless the previous owner put it in.

 

[FatalDreams]

Yes i agree^^ Its very unlikly that it has a lsd. Just to be sure why not but one and install it? its a gret investment IMO.

 

[Boost92awd]

Yeah if the car is stock its not LSD. Sometimes they will spin both tires sometimes it wont. The only way there LSD in there is if the previous owner put one in.

 

[klipschaudio]

Jack up the front and spin one a wheel in neutral, if the other wheels starts spinning in the same direction you do not have lsd, if they spin opposite then you have lsd.

If you cant have someone watch the other wheel, put some object on it, that way you'll see where it falls to determine where the wheel spun.

Good luck

 

[romeen]

Jack up the front and spin one a wheel in neutral, if the other wheels starts spinning in the same direction you do not have lsd, if they spin opposite then you have lsd.

I believe it is the opposite. If the wheels spin in the same direction then you DO have an lsd. If they spin in opposite directions then it is an open diff.

 

[bastard dsm]

thats right^^^^if they both spin the same way its lsd.