Friday, September 30, 2005 - 04:15 pm, by: Troy Tappenden(Moredhel)
Jack the back end up, rotate one wheel and if the other rotates in the same direction, it is an LSD, if the other wheel rotates in the opposite direction, it is an open diff.
Friday, September 30, 2005 - 05:21 pm, by: Delan Peiris(Delanx)
I found out lot of information on this in the old ALSC Archive. According to all those threads it can be easily found from the numbers on the plate (under the bonnet) for the transmission.
You can see a number like A314E A01A against transmission. The last letter says the story, in this case A.
Friday, September 30, 2005 - 06:20 pm, by: Andrew Ferres(Peewee)
Troy Tappenden wrote on Friday, September 30, 2005 - 04:15 pm:
Jack the back end up, rotate one wheel and if the other rotates in the same direction, it is an LSD, if the other wheel rotates in the opposite direction, it is an open diff.
That won't distinguish between Torsen LSD and Clutch LSD.
Saturday, October 01, 2005 - 06:32 pm, by: Jeff Hogan(Hoges)
also i believe that if you have a torsen lsd and jack up the back then it will behave like an open wheeler, the same as when one wheel has no traction it will spin as the torque cant be multiplied to the other wheel with traction. but yeah as was said, check your build plate, it will tell you yay or nay, unless one has been retrofitted...
Saturday, October 01, 2005 - 08:45 pm, by: Freeman Tang(Cobra_man)
or find out for real: turn steering wheel full lock, step on the gas pedal HARD to drive farward, and see if u can do powerslides(backend steps out) with both wheels spinning. Besure not to apply brakes when taking off coz that may affect the traction difference btw both wheels and do it in an open, safe environment.
Sunday, October 02, 2005 - 06:40 am, by: Ben Evans(Sbyder)
rotate one wheel while jacked up, when the other wheel starts spinning the opposite direction, get a mate to try and spin it in the same direction, if its an LSD you'll notice that you'll be able to turn them the same direction at the same speed. Yours will feel its locking up to run the same speed as the opposite wheel.
Wednesday, February 15, 2006 - 05:58 pm, by: Tom Nicol(Goosemonger)
im having my TT fitted with a Torsen right now, i sent my old diff off to get reco'd cause it decided to pack it in. (i think the previous owner gave it too much of a caning) and it turns out it was completely ruined and he couldnt get the bearings, so he said he's located a torsen lsd (import) and he'll chuck that in for me! so im stoked!
also my mechanic told me that if you jack the back wheels up on a torsen and spin one wheel the other will stay still, but once you step on the gas both lock in and turn together. atleast i think thats what he said...}
Wednesday, February 15, 2006 - 06:02 pm, by: Andrew Ferres(Peewee)
Tom Nicol wrote on Wednesday, February 15, 2006 - 05:58 pm:
also my mechanic told me that if you jack the back wheels up on a torsen and spin one wheel the other will stay still, but once you step on the gas both lock in and turn together. atleast i think thats what he said...
} In theory that is kinda what is supposed to happen. Its open centre until it senses torque (TorSen) and then it locks.
However I have a brand new torsen in my car, and good luck getting the wheels to independently turn. At the moment its basically a locked diff. I'm sure with a tonne of car forcing the wheels to do different things it will happen, but trying to do it by hand is impossible.
Tom Kneebone TryHard WA factory 5 spd TT : Auto TT
Friday, March 03, 2006 - 11:12 pm, by: Morgan Cross(Morgan)
Jeff Hogan wrote on Saturday, October 01, 2005 - 06:32 pm:
but yeah as was said, check your build plate
Mine reads A02A but it should read A02B
I think Freeman summed it up nicely, forget all this garbage about jacking up the ass and spinning wheels all different ways.
Just go to a deserted car park, full lock, then stomp your foot down, if your ass whips out it's obvious, same goes if it does massive oval donuts like my parents old Commodore used to do :P
Saturday, March 04, 2006 - 11:53 am, by: Tom Kneebone(Tomk)
This question get's asked a bit. Differences that are noticeable on mine. Turning right into a street never used to cause any sound of stress on the inside tyre unless you stuck you're boot into it. If I booted half way through a mild turn, the inside wheel let go but back end did not drift From a standing start in a straight line, both wheels melted the road until I backed off a little to get some traction. Driving along in the wet in a straight line, both wheels would spin and the back end would definitely be slipping anna sliding.
Now with Torsen center, T1 or T2 I haven't a clue. The big tell tale is the right hand turn into a street. no load -- no difference, mild load--- inside wheel can be heard to be under strain ( you gotta have you're window down ) little more load, inside wheel gives mini chirps boot full the back end whips out way faster than it ever did before. Weight transfer accelerating hard out of a corner is different also but you won't feel that unless you drive one then the other like I have.
I've been driving my soarer since friday, first time with a torsen diff and yeah on sharp slow turns you can hear the inside wheel cherping. Its like a locker diff. I still haven't got my one to lay down two black lines as I need a higher stallie or a manual box, but even when the turbo hits boost with 20 odd pounds even around a slight bend, don't wheel spin. Awesome diff. I only get a cherp into second in a straight line, and sometimes thrid, but could be a combo of semis slicks and awesome torsen diff. Amazing amount of grip now.
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