NEW! Engineered Performance Limited Slip for the front differential

pontiacjeff

New member
Hello, I am pleased to announce the immediate availability of my new Engineered Performance Limited Slip Differential for the GMC/Chevy front differential as found in the Sy/Ty trucks. I have been building this limited slip conversion for GM FWD cars for over 10 years. It is a well-proven design that has been tested over 600hp and run in the 11's on slicks. I already have one unit proto-typed and built.

I understand the need for a front limited slip has been debated for a long time. I can speak from a front-wheel drive perspective and say, it is a must-have! Torque steer is virtually eliminated with the EP-LSD. Both tires will drive all the time. This unit is NOT a locker and does not require any modifications to install. It is a fully functional differential with NO CHATTER, NO CLUNK OR RATCHETING. Its use will be imperceptible in normal street driven trucks. It is a direct replacement for the stock open differential. The unit uses sintered bronze clutches, cnc-machined and heat-treated pre-load plates, and an application specific pre-load spring rate. These parts and the conversion process have been used for over ten years in other GM FWD cars with NO failures of any LSD-specific parts. The unit is rebuildable, but the clutches have been tested over 100K miles in some of the earliest designs and had NO MEASUREABLE WEAR on inspection.

Please reply here if you have any questions or comments. I am happy to debate the need for such a unit, as long as it stays technical in nature. I don't waste time in "philosophical" discussions.
 
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sy605

Member
Re: NEW! Engineered Performance Limited Slip for the front differential

I'm interested depending pics.

What FWD application (model) have they been "proven" tested in?
 

pontiacjeff

New member
Re: NEW! Engineered Performance Limited Slip for the front differential

I'm interested depending pics.

What FWD application (model) have they been "proven" tested in?

Everything from the popular 3800 Supercharged platform cars (grand prix, regal), I had one race only car that ran in the 10's, fwd, to grand ams, cavaliers, turbo sunbirds, RWD fieros, 700hp turbo Cadillac Northstar STS that ran in the low 11's. I build a unit for all GM FWD yransmissions, auto and manual. I have been approached by other non-GM people. I built a few units for Dodge Neon SRT-4, a couple for old RWD English imports, I even build an lsd for the classic 73-78 front wheel drive GMC motorhomes that weigh 12,000#. They use the old Cadillac/Olds TH425 transaxle. Thr first unit I sold in 2003 is still in service in my friends 1998 Grand Prix GTP former daily driver turned show car. It has over 100,000 miles on it, we tore it down last year while he had the drivetrain out for detailing and inspected it. There was no measureable wear in the clutches or plates!

I have built and sold over 500 units for everything from street driving, drag racing, auto cross, asphalt, dirt, even ice racing! I havr one guy who races a FWD Toronado figure 8-style racinf! But most are driven street cars that go to the track now and then.
 

tx1

New member
Re: NEW! Engineered Performance Limited Slip for the front differential

Sounds good to me! Def interested!
 

pontiacjeff

New member
Re: NEW! Engineered Performance Limited Slip for the front differential

Sorry for the delay in pictures, I have been busy building and shipping FWD units this week. I will take some photos tonight of the assembled front limited slip differential (7.2") for the Chevy/GMC trucks.
 

pontiacjeff

New member
Re: NEW! Engineered Performance Limited Slip for the front differential

You can call me if you have any questions regarding the EP-LSD for your truck. 404-394-5776
 

pontiacjeff

New member
Re: NEW! Engineered Performance Limited Slip for the front differential

The EP-LSD for the Chevy/GMC 7.25" front differential

CAM00703_zps3ad10491.jpg


Plase call Jeff @ 404-394-5776 for more information.
 

killa66cam

RIDIN DIRTY
Re: NEW! Engineered Performance Limited Slip for the front differential

There it is...I was wondering when pics were going to be up!

Cam
 

0966Sy

Code what?
Are you willing to provide one for testing in our application to someone here? Depending on results then putting together a group purchase with a lower price? With good results I don't think you would have a problem selling 20+ in one run.
 

Ryan Heller

New member
Re: NEW! Engineered Performance Limited Slip for the front differential

Hell all that looks like is a phantom grip I have used them countless times in the fwd cars over the years
 

e95 Ty

New member
Re: NEW! Engineered Performance Limited Slip for the front differential

Hell all that looks like is a phantom grip I have used them countless times in the fwd cars over the years

X2 I was expecting a machined custom piece. That looks like a stock carrier to me with some mods to it. Please correct me if i'm wrong.....I see that the post says it's a conversion I was just expecting something different. I'm interested to see real performance #s compaired to our stock open diffs....
 
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pontiacjeff

New member
Re: NEW! Engineered Performance Limited Slip for the front differential

Are you willing to provide one for testing in our application to someone here? Depending on results then putting together a group purchase with a lower price? With good results I don't think you would have a problem selling 20+ in one run.

Three units are being shipped next week. They will be ibstalled and you will have results very soon. I understand the desire for tedtimonials.
 

pontiacjeff

New member
Re: NEW! Engineered Performance Limited Slip for the front differential

Hell all that looks like is a phantom grip I have used them countless times in the fwd cars over the years

And my EP-LSD for GM FWD cars has replaced dozens of exploded Phantom Gripe inserts.

This convertion is NOTHING LIKE a PG. My cnc-machined preload plates are heat-treated to Rockwell C-xx, this keeps from filling the diff with metal shavings (ala PG) and allows me to run much higher preload. And the biggest difference is the EP-LSD uses clutches! Made of sintered bronze, the highest coefficient if friction and wear if any clutch material, my clutxhes carry the load of high horsepower applications while lasting nearly forever! The PG preloads the factory steel thrust washers that ARE NOT designed ti carry any load, only to provide a wear surface. The PG will gall and eventually explode. Seen it dozens of times.

With all due respect, there really is no comparison.
 

pontiacjeff

New member
Re: NEW! Engineered Performance Limited Slip for the front differential

X2 I was expecting a machined custom piece. That looks like a stock carrier to me with some mods to it. Please correct me if i'm wrong.....I see that the post says it's a conversion I was just expecting something different. I'm interested to see real performance #s compaired to our stock open diffs....

You will never find a machined custom ANYTHING for $599!!! The stock open diffrentifag is converted to function as a limited slip differential. It is not simply a "kit", but a fully machined, prpose-built differential.
 

e95 Ty

New member
Re: NEW! Engineered Performance Limited Slip for the front differential

Three units are being shipped next week. They will be ibstalled and you will have results very soon. I understand the desire for tedtimonials.

If you can show us real world performance improvements (i.e. 60' times at a track) i'm sure you can sell a bunch of them on here (me included). How will this hold up with the real high hp trucks with drag radials on the fronts durability wise?
 
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