lsd tranny, after market lsd r stock lsd Options

[BonzaiCelica]

wait e153. isn't that tranny for mr2 turbo's. and when i did this video, i had car up on two jack stands and it was in nuetral.

[pittfirefighter]

LSD does not help icey/wet conditions... usually makes it a lot more difficult for the novice driver... however like said by Jim... you're are not going to notice Toyota LSD unless its a fairly high horsepower car that is being taken to redline... normal driving does not bring out the LSD characteristics... it is not a full LSD... its a 1.5... it only engages when it is needed....

Let me break it down:
When you are driving a non-LSD car... when you make a turn... the inside wheel has to spin less then the outside wheel... it has a smaller arc that it is making therefore a smaller circumference (distance)... the car automatically allows it to do this and this is called slipping.... in a Limited slip... this is taken away so that every bit of power that is used to spin the wheels is harnessed rather then letting it "slip".... anyone that has driven a 4x4 knows that if you turn the front wheels all the way and hit the gas... the wheels bind and the car jerks... that is Limited slip... the inside wheel is trying to go less then the outside wheel and it is not being allowed to do so...
now we have sports cars... so having that all the time would not be good.. so thats the 1.5... it kicks in at high RPM so that you can harness all of the power but is relaxed on low rpm so you can still make easy turns and not have your wheels bind while backing out of a parking space...

LSD will make it harder to turn at high rpm... it is trying to keep the car straight... it does not make it easier like other people have said...
and it does not always give a smooth acceleration like Jim has noticed... i punch mine and i get a skipping (walking) effect due to my shotty tires... a non LSD car would not have this problem...

[BonzaiCelica]

now we have sports cars... so having that all the time would not be good.. so thats the 1.5... it kicks in at high RPM so that you can harness all of the power but is relaxed on low rpm so you can still make easy turns and not have your wheels bind while backing out of a parking space...

LSD will make it harder to turn at high rpm... it is trying to keep the car straight... it does not make it easier like other people have said...
and it does not always give a smooth acceleration like Jim has noticed... i punch mine and i get a skipping (walking) effect due to my shotty tires... a non LSD car would not have this problem...

ok so from i have understood after reading your excellent explanation several times. It sounds to me like LSD isn't that great. Your saying it is only meant for cars that have a high amounts of high horsepower. so it would be ideal for people who are getting 3rd gen 3sgte engines into their cars that will be only using it as a fwd format.

so i plan on swapping out a beams engine in a few years would you recommend lsd for that engine. i plan on getting lightweight flywheel, headers, cai. that should be no more than what like 25 hp. SS-III with beams comes with stock lsd right?

oh and about you saying the 1.5 trd lsd makes it easy to take turns at low speeds and backing out of parking lots. When i was at school, this 240sx tires were screeching as he was slowely turning in the parking lot, he said he had lsd. Is that considered full lsd.

I also have a friend that has a swapped integra gsr engine on his civic that has 170hp with a turbo. So it comes to around 250hp. when he takes a turn and floors it on the turn, his front tires hop across the turn. he has no lsd and accelerates just fine when he does a launch.

OK thanks for clearing things up. this stuff should be stickied. along with other information on the forums that has to do with lsd. it seems like your a pro at this stuff

This post has been edited by BonzaiCelica: Mar 20, 2009 - 6:22 PM

[_Jim_]

Having a Viscous 1.5way LSD (thats the type of LSD installed in the GEN3 Mr2 LSD transmissions) has NO negative side affects compared to a NON-LSD tranny.

The LSD is not "activated" by rpms......its "activated" by LOAD. I cant say for sure that the LSD trans hooks up both wheels when one tires spins, as what would happen if you were on ice.....because I do not take my car out when it is icy. So I really cant comment.

As for when LSD is "needed," well that is totally dependent on the driver. It is never a "step-back" istalling LSD on your setup....It will make just about all aspects of motorspots easier. For example, you say your friend can launch his car VERY well.....Well if he had LSD, he would STILL be able to launch his car very well, but be able to do so with an added 1500-2000rpms.

As for my definition of "smooth acceleration," that is meant for 100% traction. Even a car with LSD will still experience wheel hop/chirping.....that is not to be confused with Torque steer. I meant the way the car tracks/feels when you punch the gas going 50+mph. You can literally hold the wheel with one finger because there inst any torque steer to fight. Where as a car with NON-LSD, after hitting the gas at 50+mph....there is a lot of torque steer to fight threw to keep the car straight. Of course this becomes a bigger problem as you make more power. A car making 100whp will have almost no TQ steer, where as a car with 200whp has some, and a car with 300whp has a decent amount, and so on...........

[Rusty]

yeah I sometime get Torque steer, pulls me to the right, towards the centre line.

one thing with I've heard about Viscous LSD that are JDM standard on some/most models not just toyota is that after 90,000km ish they are useless, and you have to get them rebuilt (or maybe you cant) or get a aftermarket one

[pittfirefighter]

Jim you are right about the load and not the RPMS... i use RPMS in my explanation because most only hit high rpms when under full load and it tends to make it a little easier to understand... i only hit high RPMS when i punch it so it becomes one in the same....

and just from experience.. going 100+ and accelerating in an LSD car and switching lanes is more difficult then doing the same in a non LSD car...

as for the viscous LSD... rusty you are absolutely right... they act like an open differential after usually 60-90k

[Smaay]

its the MKII MR2 that has the E153 tranny. the MKIII is the Mr2 spyder and it came with the C54 tranny attached to a 1ZZ engine. it will not bolt up to a 5S or 3S

[BonzaiCelica]

ok so i think i finally got the point of lsd. I was looking and i saw a kaaz and trd 1.5 way lsd. Like you said these types of lsd are not always engaged when normal driving but only your doing spirited or track driving.

well torque steer happens in fwd cars becuase the axles are not the same lengths. So the one axle is shorter gets more of the power and thus creates torque steer. Now if you were to install an lsd on a fwd car that has 200whp. You will still notice some torque steer even if you have lsd right?? and lsd isnt that great for taking turns since it will want to keep the car going straight. So being that i get a beams swap and i put all possible bolt ons. would it be necessary to get a lsd. Cause they are expensive!!! (hmm am i making this more complicated that it shud be?? )

So from what ive searched online. It will help accerlerate your car slightly faster in 1st and 2nd gear. It will put power to both wheels equally?

This post has been edited by BonzaiCelica: May 18, 2009 - 9:22 PM