Rear diff lube.
Elder User
Joined: Oct 2006
Posts: 843
Likes: 1
From: Redmond, WA
Originally Posted by Conanski
The LS needs a rebuild then.
Hotshot
Joined: Oct 2003
Posts: 17,799
Likes: 104
From: Ashland City, TN
Both LS rear ends conaski.
Yes, Usually one tire spins unless i'm on gravel, or useing my leet driveing skills.
My 91 hooked up with the LS rear end but it also had 3.05 gears in it also. This truck has had 3.55's in the LS rear end that broke, and the rear end in it now. The tag said LS on it, i have it saved, but its open diff.
*shrugs* Performance wise, NO difference. Or perhaps thats my driveing skill showing through instead of the mechanics.
Friction modifier dosn't seem like it would make things less friction like....
my gut tells me you guys have it backwards.
Yes, Usually one tire spins unless i'm on gravel, or useing my leet driveing skills.
My 91 hooked up with the LS rear end but it also had 3.05 gears in it also. This truck has had 3.55's in the LS rear end that broke, and the rear end in it now. The tag said LS on it, i have it saved, but its open diff.
*shrugs* Performance wise, NO difference. Or perhaps thats my driveing skill showing through instead of the mechanics.
Friction modifier dosn't seem like it would make things less friction like....
my gut tells me you guys have it backwards.
Postmaster
Joined: Oct 2006
Posts: 4,816
Likes: 1
From: Davis & Newcastle, CA
My understanding is that the clutches are biased towards locking the diff more than keeping it open (I know locking is not the correct term here but whatever). This is why without the friction modifier you will get clicks and chattering when going around turns or spinning the tires. The friction modifier allows the clutches to slip so that you can make tight turns without the diff trying to lock the tires up. For this same reason you don't want to add too much FM because then the clutches will just slip all the time and you might as well have an open diff. Make sense?
Elder User
Joined: Oct 2006
Posts: 843
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From: Redmond, WA
Originally Posted by Skandocious
My understanding is that the clutches are biased towards locking the diff more than keeping it open (I know locking is not the correct term here but whatever). This is why without the friction modifier you will get clicks and chattering when going around turns or spinning the tires. The friction modifier allows the clutches to slip so that you can make tight turns without the diff trying to lock the tires up. For this same reason you don't want to add too much FM because then the clutches will just slip all the time and you might as well have an open diff. Make sense?
No clutches. No friction modifier. A much more aggressive Limited slip with lock up quality and everyday driveability. Worm-gear full time torque sensing- tire light up fun! Take a look below
http://cgi.ebay.com/ebaymotors/NEW-FORD-RACING-M-4204-T31-TORSEN-T-2-8-8-DIFFERENTIAL_W0QQitemZ290142088447QQcmdZViewItem
I used to put the truck in 4wd to pull it out of one of my favorite boat launches with the LS. Either that or powerbrake the hell out of it to get that LS to wake up....even years ago. The Torsen locks up (or to be frank...divides power) evenly, quickly and even completely underwater or mud.
Elder User
Joined: Oct 2006
Posts: 843
Likes: 1
From: Redmond, WA
Originally Posted by Skandocious
How was the swap for that Torsen diff Mike? A lot of work or more of a direct swap?
Quite easy. I did it the same time I bumped to a 4.10 gearset. Crosspin only needs notching for 4.56 and up ratios.
I got lucky (in a sick way) and a buddy of mine totalled his CJ-7. He had 8.8 axles in front and rear. I got the posi setup for $200 with 1500 miles on it. A decent LS rebuild kit with upgraded clutches would have costed $100+.
Very nice upgrade over the stock LS...IMO.
Mike
Postmaster
Joined: Oct 2006
Posts: 4,816
Likes: 1
From: Davis & Newcastle, CA
Damn, nice find. Maybe I'll do that eventually. What I REALLY REALLY want is some 4.10s, my truck is dogggggg with this 3.55 - 33" tire combo.
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Elder User
Joined: Oct 2006
Posts: 843
Likes: 1
From: Redmond, WA
Originally Posted by EPNCSU2006
It must be Chrysler that uses the term "trac loc" for their limited slip rear ends...
Here's the LS that shows up in our 8.8" rear ends from the Factory. The link below is for the 28 spline version, but the 31 spline has the same name.
http://www.fordracingparts.com/parts/part_details.asp?PartKeyField=221
Mike
Hotshot
Joined: Oct 2003
Posts: 17,799
Likes: 104
From: Ashland City, TN
My truck only likes to be doggy in 5th, thank god.
Watch out in 1-4th. hahaha
Not as good as my 91 though. =*(
http://home.comcast.net/~wibin/01.jpg
http://home.comcast.net/~wibin/02.jpg
The motor still lives. God i wish i would have kept it, It was a beast!
The fan and the drive shaft are now in my truck.
Stupid fan clutch! oh well. the lighter fan made so much diff in power.
and my drive shaft took a hike down the Eway.
So i had one made.
Watch out in 1-4th. hahaha
Not as good as my 91 though. =*(
http://home.comcast.net/~wibin/01.jpg
http://home.comcast.net/~wibin/02.jpg
The motor still lives. God i wish i would have kept it, It was a beast!
The fan and the drive shaft are now in my truck.
Stupid fan clutch! oh well. the lighter fan made so much diff in power.
and my drive shaft took a hike down the Eway.
So i had one made.
Elder User
Joined: Oct 2006
Posts: 843
Likes: 1
From: Redmond, WA
Originally Posted by Skandocious
Damn, nice find. Maybe I'll do that eventually. What I REALLY REALLY want is some 4.10s, my truck is dogggggg with this 3.55 - 33" tire combo.
Originally Posted by Talyn
The motor still lives. God i wish i would have kept it, It was a beast!
I could use another roller ready block and truck donor to build a stroker.
Postmaster
Joined: Oct 2006
Posts: 4,816
Likes: 1
From: Davis & Newcastle, CA
Hey Mike, aside from the difference in power going from 3.55s to 4.10s, did your gas mileage increase with those 33" tires or did it still decrease?
Last edited by Skandocious; Jul 27, 2007 at 02:26 PM.
Elder User
Joined: Oct 2006
Posts: 843
Likes: 1
From: Redmond, WA
Originally Posted by Skandocious
Hey Mike, aside from the difference in power going from 3.55s to 4.10s, did your gas mileage increase with those 33" tires or did it still decrease?
Postmaster
Joined: Oct 2006
Posts: 4,816
Likes: 1
From: Davis & Newcastle, CA
Man... Then I'm not sure I can convince myself to pay for it. I was hoping to see a little better gas mileage plus the power, which was my own justification for spending the money... I'd need to find the gears for real cheap, in good shape, and then I'd have to find a shop that'd swap 'em for cheap because I don't think I could do it myself. Would it be nice if all that could just COME together!?