gazzi123 Posted December 20, 2010 Share Posted December 20, 2010 Hi guys, i no this may seem a stupid question - but since the snow fall i cant understand what the supra is doing? Pulling out my drive 1 rear wheel is clearly on the tarmac road surface (no/little snow on ground) other rear wheel is on snow/ice. The wheel on snow/ice is spinning like crazy whilst the other wheel on perfectly solid tarmac with loads of grip is doing nothing at all? - im very confused? even in my astra before my supra - the wheel with grip normally spun - not the other wayt round??[OOPS][/OOPS] Quote Link to comment Share on other sites More sharing options...
Jurgen-Jm-Imports Posted December 20, 2010 Share Posted December 20, 2010 Lsd Quote Link to comment Share on other sites More sharing options...
Scott Posted December 20, 2010 Share Posted December 20, 2010 You won't have the trick LSD that sorts all that out for you (or something like that, I'm not up on diff terminology ) Quote Link to comment Share on other sites More sharing options...
TRD-Rob Posted December 20, 2010 Share Posted December 20, 2010 you have lsd mate Quote Link to comment Share on other sites More sharing options...
gazzi123 Posted December 20, 2010 Author Share Posted December 20, 2010 But i always thought that wheel with most grip would pull you through not other way around? and it seems its always my left rear wheel spinning my drivers side does nothing? Quote Link to comment Share on other sites More sharing options...
Sakey Posted December 20, 2010 Share Posted December 20, 2010 Mine does this. I always put it down to the diff being an open diff... though i've got a feeling i'm wrong! Quote Link to comment Share on other sites More sharing options...
gazzi123 Posted December 20, 2010 Author Share Posted December 20, 2010 Its so annoying lol ....im like 'I HAVE GRIP FOR GOD SAKE AND IM MOVING SIDEWAYS!!' Quote Link to comment Share on other sites More sharing options...
Scott Posted December 20, 2010 Share Posted December 20, 2010 you have lsd mate Really? I thought if you had a LSD it would put the power to the wheel with the grip?? Hence why you get nice burning 11's if you floor it off the line. An open diff would create the problem he is seeing, and would also give you a nice 1 flooring it off the line. Quote Link to comment Share on other sites More sharing options...
Sakey Posted December 20, 2010 Share Posted December 20, 2010 Its so annoying lol ....im like 'I HAVE GRIP FOR GOD SAKE AND IM MOVING SIDEWAYS!!' I know! I manged to get stuck on a peice of ice that was about 10cm long! Other wheel firmly on tarmac Quote Link to comment Share on other sites More sharing options...
gazzi123 Posted December 20, 2010 Author Share Posted December 20, 2010 Just found definition on wikipedia: The main advantage of a limited slip differential is shown by considering the case of a standard (or "open") differential where one wheel has no contact with the ground at all. In such a case, the contacting wheel will remain stationary, and the non-contacting wheel will rotate freely—the torque transmitted will be equal at both wheels, but will not exceed the threshold of torque needed to move the vehicle, and thus the vehicle will remain stationary. In everyday use on typical roads, such a situation is very unlikely, and so a normal differential suffices. For more demanding use, such as driving in mud, off-road, or for high performance vehicles, such a state of affairs is undesirable, and the LSD can be employed to deal with it. By limiting the angular velocity difference between a pair of driven wheels, useful torque can be transmitted as long as there is some traction available on at least one of the wheels. Quote Link to comment Share on other sites More sharing options...
Crouch Posted December 20, 2010 Share Posted December 20, 2010 Hey gazzi123 it's normal for this to happen! think of it like electricity, the power will always go for the route of least resistance its the same with cars without a lsd (limited slip diff) the power will take the easy route! if your astra did this then its unusual but with a front drive car the gearbox is on the side of the engine ( trans axle i think its called) this set up also throws in that power will tend to go to the shortest drive shaft. the solution is to go for an lsd. then the more power/torque you put through the diff to one wheel the more the diff will grab and force the other to take up the effort!! simples! Quote Link to comment Share on other sites More sharing options...
gazzi123 Posted December 20, 2010 Author Share Posted December 20, 2010 I was cackin myself i thought there was summit wrong with my supra....ah well - Still baffles me how it was designed like this , for the wheel with grip to stay still and wheel without grip moves....would be better otherway around - ah well joys of the snow Quote Link to comment Share on other sites More sharing options...
gazzi123 Posted December 20, 2010 Author Share Posted December 20, 2010 Cheers peeps for the advice Quote Link to comment Share on other sites More sharing options...
Scott Posted December 20, 2010 Share Posted December 20, 2010 I was cackin myself i thought there was summit wrong with my supra....ah well - Still baffles me how it was designed like this , for the wheel with grip to stay still and wheel without grip moves....would be better otherway around - ah well joys of the snow I'm fairly certain you don't have an LSD... and that is the issue. N/As generally don't have LSDs, I think it was an optional extra. If you had an LSD it would give grip on both wheels Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted December 20, 2010 Share Posted December 20, 2010 It depends on the amount of drive shaft torque is applied, if you have a nice dry road and put the boot in, both wheels will spin up, which is why you can drift well on an LSD, but if there is little grip on one wheel that will spin up because there is little torque being applied, so there is much less lock up force within the diff. Quote Link to comment Share on other sites More sharing options...
JamieP Posted December 20, 2010 Share Posted December 20, 2010 You dont have a lsd, you have a open diff so the wheel with less resistance spins. Quote Link to comment Share on other sites More sharing options...
TRD-Rob Posted December 20, 2010 Share Posted December 20, 2010 mmm maybe im wrong then mate Quote Link to comment Share on other sites More sharing options...
David P Posted December 20, 2010 Share Posted December 20, 2010 Quote Link to comment Share on other sites More sharing options...
Dr_Doom Posted December 20, 2010 Share Posted December 20, 2010 (edited) It depends on the amount of drive shaft torque is applied, if you have a nice dry road and put the boot in, both wheels will spin up, which is why you can drift well on an LSD, but if there is little grip on one wheel that will spin up because there is little torque being applied, so there is much less lock up force within the diff. It doesn't matter if you've got an open diff or a stock LSD. Both will result in one wheel spinning in snow as it is a torque sensing diff (Tor-sen). The diff doesn't lock unless under load (which it wouldn't be in snow/ice) If you had a TRD clutch type LSD diff fitted then it would be a different ball game Edited December 20, 2010 by Dr_Doom (see edit history) Quote Link to comment Share on other sites More sharing options...
CanisLupus Posted December 20, 2010 Share Posted December 20, 2010 You can try and use the E Brake a little bit so the Spinning Wheel is slowed down giving more Torque to the stationary. Quote Link to comment Share on other sites More sharing options...
RedM Posted December 20, 2010 Share Posted December 20, 2010 Next time just leave it in gear, get out and push the car into the nearest house. Job done and you'll become a legend to boot. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted December 20, 2010 Share Posted December 20, 2010 Next time just leave it in gear, get out and push the car into the nearest house. Job done and you'll become a legend to boot. But isn't it a prerequisite to be female to carry off that maneuver? Quote Link to comment Share on other sites More sharing options...
Tyson Posted December 20, 2010 Share Posted December 20, 2010 But isn't it a prerequisite to be female to carry off that maneuver? You need someone with a camera phone as well to catch it all on film. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 20, 2010 Share Posted December 20, 2010 (edited) CanisLpus has the right idea, try pulling the handbrake on a few notches, this will add a torque loading to the spinning wheel and your open (none LSD) diff will transfer some torque. My tractor allows me to independently brake each back wheel as it's a base model without a driver operated fully lockable diff. Whilst not as good as a locked diff it helps a LOT if traction is bad. You can tell Canis is used to driving on snow Edited December 20, 2010 by Chris Wilson (see edit history) Quote Link to comment Share on other sites More sharing options...
caseys Posted December 20, 2010 Share Posted December 20, 2010 N/As generally don't have LSDs, I think it was an optional extra. If you had an LSD it would give grip on both wheels Correct, my old NA had the optional LSD Quote Link to comment Share on other sites More sharing options...
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