I was trying to describe how to test the rear end to help supr_sly and he quoted my entry with a lol at the end. Plus he doesn't know much about LS or Posi rear ends to start with. I was a mechanic and drag racer for 10 years, and specialized in transmissions and differentials, and really don't like wise guys.

 

Point he wasn't trying to be a smart ***,just add a little humor.Go have a drink and try and make friends.

 

Maybe so. Whatever.

 

A LS rear is very much the same as a standard one when it is static so you can spin one wheel (while up in the air) and the other one will spin in the opposite direction when it is in park. Out of park both wheels will probably spin together due to a slight drag in the unit. You need to do the actual test I described. The unit responds to torque and there is none at zero RPM.

 

He was being humorous bro.

1 was telling the OP to spin the tires on his lawn and then he would know if he had a limited slip differential.

LOL's can be used in a rude manner and a humorous manner. In this case, 1 telling the OP to tear up his own yard was for humors sake.

It's all good, ExV10. We appreciate you posting and adding your knowledge base to this forum.

Stewart

 

Thanks, Maybe I jumped to a conclusion.

 

Yeah, 1 is one of the good guys, like most of us in the Ex forum.

There is another member who has numbers in his name that has been known to come across in a rude manner a few times.

If he had posted, there'd be no mistaking if he was rude.

Stewart

 

Not sure how I came off as rude but a G80 in a GM gtruck like my late 90's tahoe and used from mid 90's till at least mid 00's is a LOCKER that is activated by a RPM differential between the rear tires. The old G80 used earlier may have been a friction unit, but I am not sure on that exactly to be quite honest. I'm not looking to start a war but how did I come off as rude? If anything I am taking a little offense to your post.

I'm not saying, I'm just saying....

 

Differentials, Locking Differentials

That's eatons description of the G80 Locker. A little more research is showing GM is offering the G80 Locker, and a G86 Limited Slip, separate options. Now as far as I know the G80 is triggered by a differeence in RPM between the two wheels and theres mods that you can do to adjust when it locks. It works as a open diff till it senses the slip then locks I'd guess till the load is off and it releases again. You can't have it locked at all times obviously.

Now where there may be some confusion, in my 96 impala I believe the auburn non-rebuildable limited slip is also RPO code G80 I will look sometime tomorrow to be sure. Seems GM threw around the G80 RPO and is what's causing confusion. This being a newer truck related forum used what the G80 is in todays truck terms. I will look into this more later I'm just bored at work on my cell phone now.

 

Here is a great video demonstrating the G80 and how the RPM differential causes the "locker" to engage. I say "locker" because it turns out it does use friction plates, which really isnt a true locker, but it appears to be quite an agressive set if frictions. So I was wrong about there being friction plates in the G80 "locker" but you were wrong about wheel RPM not having anything to do with it. So I guess we both learned something today?

YouTube - Chevrolet Silverado With G80

YouTube - How a Eaton G80 locker works

The limited slip in my 96 Impala SS is indeed RPO code G80 and is a non-rebuildable unit as its one of the cone friction setups. So I blame GM for using the same RPO for a nbumber of different setups. Kinda stupid on GM's part in my opinion.

P.S. I wasn't being a wise guy and put a lol cause I told him to give himself a lawnjob jokingly. Also I have a LSX camaro running 9's and have been in the racing community for many years myself and built a number of cars so I respect your knowledge and I'm sure I could learn something from you as well. Were all here to learn new things and help each other. It's pretty rare on this board especially that someone is being a troublemaker other then one user, but we will leave his name out of it.

 

He did not quote what you said. He said basically the same thing as you which means he was AGREEING with you.

 

Speaking of which, I miss the quote you use to have in your sig.

Stewart

 

Maybe I jumped to a conclusion. Sorry if I'm wrong.

 

1; I was mechanic and raced cars and bikes all through the sixties at Fremont drag strip in California. That G80 diff is interesting in that it does use a governer and therefore is affected by RPM. In the 60's the closest thing to a locker was the Detroit locker. I was familiar with the Positraction and Limited Slip and after seeing your image of the LS? I can see they haven't changed. We were both right but talking about 2 different things. The Posi and LS compress the plates with torque. The 2 ramps on the spider cage move the X trunion which has V cuts on 2 of the shafts so when torgue is applied this in turn moves the side gears/spiders against the clutches and locks it up. Simple compared to the newer ones that do use the RPM factor. Sorry to question your knowledge and I think it was more of a new technology issue that I wasn't aware of. Getting back to the original post I think he was just referring to the relatively simple LS diffs. No problem.

 

thanks for all the help, i hope every one will stay friends . and by the way has any one heard of prowertrax no slip diff's YouTube - Difference btw. Locker and Limited Slip i put a link to a youtube clip they got out looks impressive