I know we need to put friction modifier in our rear ends, i did on my last one... my question is does this make the LS tighter or looser... i just put a LS 8.8 rear end under my truck with 50k on it and man its pretty loose... I would really like to stiffen her up a bit... it was nothing like my LS that had 160k on it... it would still hold good posi..

Thanks

Burns

 

Bumpity bump bump

 

The additive is to lube the clutches to eliminate chattering. Won't really tighten it up any.

 

well its a friction modifier, and i cant belive that it makes it more slipery.... so im assuming that it makes it slip less to eleminiate the chatter.... but thats just a thought... Im just disapointed in this rear end... i know it should be better

 

The one in my Mustang has never been really tight, but does spin both tires.
I just figured that it allows them to slip so that they don't chatter. If they gripped more, it would want to drag a tire in a corner.
I was always told that the GM modifier was made from whale sperm, but I can not verify this.

 

Lol, ya i dont know what i will do... probably just deal with it for now...

 

That job would suck!

 

In effect, the friction modifier will make the clutches "looser." It would be like putting oil down on a shop floor and walking on it...you won't get the maximum ammount of grip on your shoes...but they won't wear out as fast

The chatter you feel is because the clutches are trying to grab and spin your tire. Makes for a very tight LS unit...but you'll be replacing your clutches every certian number of miles...

 

well my ls is weak as heck, thats what im complaining about... im pretty familure with the chatter of the clutch packs.. none the less my LS sucks

 

friction modifier should be called friction reducer.

 

With the diff full of oil, I would think the modifier would make the oil less slippery (for lack of a better word).

 

put the transmission in neutral, jack up one rear wheel and try to turn it. with a LS rear end, the cluth will drag and make turnign the wheel dificult. if it has no LS, it will turn easy.

 

I know it has LS, i checked tags before i bought the axle, unless somebody swaped... and i posted some pretty darn posi burn out for 50+ft..id asume theres some sort of posi in there or whats left of one..

 

They aren't the best units out there as far as tightness goes.

 

Datza som jok aboss!

IMO the story that's "always told" involves Sperm whale oil, not "whale sperm". I'm not sure how much "whale sperm" anyone thinks might be around on Earth. However nobody should need to "verify" that its a relatively tiny amount compared to the 100's of barrels of exceptionally high grade oil rendered from a big Sperm whale carcass.

Another story that's "always told" is that synthetics have replaced the bulk of whale oil applications since marine mammals received protection & imports were banned many years ago. Supposedly high grade instrument oils use most of the whale oil these days & the military justifies its use on things like gyros in ordinance. Its extremely expensive, packed in tiny bottles & simply not available in quantities to service millions of vehicle rear ends.

When servicing my LS the Q came up whether differential oils marketed specifically for LS also required the FORD approved additive. Local experts said yes. I never sensed chatter, or had any feeling if the LS was tight or loose, before or after. Of course I've never aspired to "some pretty darn posi burn out for 50+ft".