LSD with Automatic transmission

[slydin'240]

I bought my 240 with an auto because I could pass up the deal, $500. My question is can you put in a LSD with the automatic transmission. Pro's, Cons any info will help. I know most of you will replay with doing a 5 speed swap, but I don't want to do that yet. I will say for an auto its not too bad at all. I was quite surprised how it pulls through the gears. Oh you will probally want to know that it is a 93 coupe with the DOHC motor.

[nismojason]

It will work for either an auto or manual as far as I know, and the pros and cons (no cons to the v-lsd) will be the same as a manual.

[slydin'240]

Ya I kinda figured there would not be any cons. I just wanted to make sure that it would work before I bought one.

Thanks for your reply.

[Neejay]

Is it worth it though?

[nismojason]

Yes, I think that it would deffinantly be worth it.

[Neejay]

Yes, I think that it would deffinantly be worth it.

I guess I dont know that much about LSD. Its limited slip differential right? So would it only be useful on an auto with tons of hp? Cause I dont really understand why you would need it on say a stock auto. I can see why on a manual, but maybe Im just ignorant on LSD?

[slydin'240]

Correct me if I'm wrong, but isn't a LSD all about getting power to the road. So having big HP shouldn't matter!? And then if or when I do do a 5 speed swap it will already be in there.

[xekushnr]

a vlsd stands for viscous limited-slip differential. like nismojason said, i cant really see any cons to adding a vlsd to your car.

with an open differential, taking hard turns with acceleration is much different than taking one with an lsd. with the balance of the cars weight spread out unevenly, there is an increased chance of one of your rears spinning faster than the other, conveniently spinning you off the road. on the open diff, there is nothing to stop this. a vlsd is operated by 2 plates spinning inside the diff at the end of each of your rear axels. there is a small clearance between the two plates. the diff is filled with a silicone fluid, and when you get into the aforemented situation, the one plate moving faster heats up the silicone, and "grabs" the other plate, causing the other wheel to catch up while still slowing the other wheel down.

your transmission has no effect on this.

[Neejay]

Correct me if I'm wrong, but isn't a LSD all about getting power to the road. So having big HP shouldn't matter!? And then if or when I do do a 5 speed swap it will already be in there.

You probably know more about LSD than I do. lol

I was just curious how it worked with an auto.

[Neejay]

a vlsd stands for viscous limited-slip differential. like nismojason said, i cant really see any cons to adding a vlsd to your car.

with an open differential, taking hard turns with acceleration is much different than taking one with an lsd. with the balance of the cars weight spread out unevenly, there is an increased chance of one of your rears spinning faster than the other, conveniently spinning you off the road. on the open diff, there is nothing to stop this. a vlsd is operated by 2 plates spinning inside the diff at the end of each of your rear axels. there is a small clearance between the two plates. the diff is filled with a silicone fluid, and when you get into the aforemented situation, the one plate moving faster heats up the silicone, and "grabs" the other plate, causing the other wheel to catch up while still slowing the other wheel down.

your transmission has no effect on this.

Good explanation. I fully understand now. Thanks! So would VLSD mostly help like with autox? Is it remotely beneficial with daily driving?

[Red coupe]

Auto cross is the when it ould be most benificial...as for dail driving... if you never break the back wheel(s) free it will never do anything...Read up on how a differential works, http://auto.howstuffworks.com/differential.htm one of the best sites ever, how it works

basicly on an open differential the drive shaft turns a set of gears that set of gears then can apply torque to either wheel, in differing amounts depending on the speeds at wich they are spining, when one tire has a lot of resistance to the differentials torque( still has grip) all the torque is transfered to the wheel that is easyer to spin, but when both tires have grip it takes more effor to spin only one tire and keep the other still then to just spin the two as a set...kinda confusing I know but watching a diff work takes all the mystery out of it, read the link above, all of it, extreamly helpfull

[240SicknessX]

i have a auto s14 open diff........ if you drift the auto it will take more power to effectivly spin the wheels than an open diff beucase of the added tracksion of the spinning of 2 tires with lsd.

slydin'240 instant message me on aim:slickrick1551 ill answer your quesitons about differentials with the automatic transmission

[Red coupe]

it might be harder to spin both wheels with a lsd but you cant spin both with an open, so one wheel will be dragged and slow you down more then if both wheels were spinning and keeping both tires from gripping. Rather than only the unloaded tire loosing traction due to the engines torque and the other being overloaded by the lack of help from the other wheel...

[slydin'240]

Wow. Thank you all for your great responses. Lots of great information.