Make your tranny more expensive to rebuild.

But realistically...they "may" knock off .001 your 60ft time

It'* not as much as you would think. You could do that about 20 times before you noticed a difference in tread depth.

Our cars are pretty bullet proof. The rev limiters protect the engine from over revving, as long as you get both wheels spinning. One wheel burnouts can damage the transaxle.
Spinning from a slick surface to a high traction surface can also damage the transaxle.

The LSD will improve your ET by about 2 tenths. It has much better 60 foots.
It will limit and provide better traction when doing those left hand turn accelerations where the left front wheel can spin wildly. With an LSD, the front end drifts a bit wide because both wheels are spinning.

So if Matt M. ran LSDs he would've been in the 8.8s last year???????? The LSD will NOT inprove your 60ft! Learning how to drive your car WILL!!!!

And yes I've ran quite a few LSDs before C-YA, Intense (G1 the best one), and one similar to to the new Intense style. You WILL see a difference in how your car goes thru water, and slicker ares but as far as 60ft-thats all BS.

And LSDs don't blow up the same as stock diffs, they do damage more when they blow up.....
Quaife and Thorsen (GMs diff) are exceptions to the rules-THEY WORK! But come at a VERY high price.

Well it worked for me and did improve my time and broke me into the 13'* where the year before it was mid 14'*

Sure the gear style like Torsen are more positive under slick conditions,but the clutch packed limiited slip style of these 1/2 price diffs are still very good. The same style has been driving my 8 1/2" 10 bolt rearend in my Firebird for 30 years. I couldn't imagine how bad the acceleration would be in that car with only one wheel drive.

I call
to anyone who says a LSD will not improve your 60 time.
You haven't tried an Engineered Performance LSD.

To compare FWD to RWD LSDs in like comparing apples to bananas. I agree 100% they work quite well in RWD, hell you can weld a RWD diff, and see awesome gains. Now if you weld a FWD diff............boom goes the diff and the tranny with it.

Your right I've never tried an EP diff....but if they use clutch like most others you are asking for problems. Have you ever had the clutch material wear down and go thru your trans? No? Give it time.

My lif experience with 60fts and LSDs

1st time ever yeah I had the same opinion as you-awesome and helped my 60 time. 1.88s consistantly 2002
the next year needed money and sold it, all other mods stayed the same, 60ft stayed the same........hrmmm. 2003
Got money and got another LSD, 60fts were slower 1.9s consistantly 2003
sold that one to buy slicks-60fts went to 1.75constistantly2004
late 04 got a G1 60s stayed the same, but the car "felt" better.
05-season off
06-sold diff, and now run 1.6 60s, I did however upgrade my ENTIRE suspension
07 not LSD and cut 1.7s on street tires=no complete passes-tuning passes

I don't want to bash any vendors, but I have had all of them fail in one way or another, none of the damage was ever covered , but they refreshed the diff for free.

FWIW, I'm number 7 on the list for sixty foot times. And I'm pulling better or equal sixties to a few cars on the list above me in quarter mile ET'* that are running LSD'*. Travis is also. In fact, he'* #3 on the list for 60' times on a stock diff.

I have a hard time believing either Travis or I could shave another .2 off our ET with one at this point. There may be some cars/owners that have. I will grant you that there may be a slight difference in hooking up both tires, where the LSD may hook up a few milliseconds before a stock diff, but it'* really not that much.

Alot of this depends on HOW you launch the car. Not WHAT you launch it with.

I did "damage" one thing, the seal on the right axle inner boot "gave out" for lack of a better term. It wasn't really "damaged", some grease squeezed out by centrifugal force. It'* the one on the right. It still works, just had to clean up in the engine bay.



the previous was held in 2nd gear, here is was third is like. This was a mistake on my part, so I let out. not comfortable doing this in third.



I released the parking brake in the first one, let off the gas and release brake in the second

Paul spewed grease a couple years ago from a boot also. It'* not uncommon, but doesn't have anything really to do with the diff. Just one of those things.

Here'* a pair of old farts on stock diff'* showing how it'* done:


I don't personally believe these burnouts would have been any safer nor the launches any better than the 1.9'* we pulled together right after this vid had we had LSD'*.

That was the year I still had the stock diff.
It was after that that I got the lsd and haven't popped a boot since.

Must be just my imagination then but I swear that I can get into full throttle sooner with the lsd. Without it, one wheel used to spin a bit after it hooked up in 1st gear and I went full throttle. :?

Where I really like it is when driving in the rain. Far less one legged redliners.

Yes clutches wear out. These units need to be rebuilt periodically. No doubt about that. Should last about 25,000 miles......for me that'* 8 years.
That'* why it'* 1/3 the price of a Quaife.
If you don't do your maintenance you always risk damaging things.

The only way I could imagine one breaking loose after first gear would be if you weren't launched straight and were correcting back to the middle of the lane when it shifted.