Rebuilding my rear Diff which posi should I install?

[Mr Carts]

I am going to have the rear diff rebuilt and figured that I should go ahead and change out to a posi diff.

I don't do heavy trail busting offroading, but the road to our place gets really slick with deep mud during the winter rains.

Which one should I use?

Thanks

[crazydog]

I am going TrueTracs front and rear when I do mine.

[Heavy_Metal_Thunder_81]

The Detroit TruTrac is one of the best IMO. The factory Trac-Lok was very good, too, though.

[mokurt]

The Eaton posi I put in my CJ7 AMC 20 worked well until the axle tubes bent. I ended up buying a Currie HP 9" with a Detroit Locker.

[acct21]

+1 on the Truetrac

[FSJunkie]

A nice LSD matches the capability of a stock Wagoneer well.

I've never used a Truetrac, but the idea of not having any clutch packs to wear out is a nice feature.

Trac-loks actually lock up really well when they have good clutches in them. The issue is the clutches wear out quickly. Powering through a tight turn (like a right turn from a driveway) will actually lock them tight enough to scoot and bark tires through the turn like a spool. You definitely know you're driving an LSD, but they lock when you need them to and do a good job. They do need new clutches every 100,000 miles, but they are cheap and easy to replace. The Chevy 350 of limited slips. LOL

The best limited slip I've owned was the Dana Powr-lok in my Marlin. Powr-loks are stronger, last longer, and have better manners than a Trac-lok. That thing never let a tire spin without the other's consent. I could mash that puppy in a straight or a turn and it was either no tires spinning or both...but get this: it never grabbed, chirped, or scooted tires through a turn. Drove as flawless and docile as an open carrier. Couldn't tell it was back there, but it sure did a good job of not letting tires spin when they weren't supposed to. The problem with Powr-loks: they're expensive.

[Mr Carts]

So the Tru Track is the one get.
http://www.summitracing.com/parts/dtl-912a579/overview/

Thanks

[joe]

Originally Posted by acct21

+1 on the Truetrac

+2

[Mr Carts]

I now have a 3.31 ratio I am running 33 inch tires.

Should I go with a 3.58 or a 3.73 ring gear?

I do not do much freeway driving maybe 4 or 5 times a year.

Thanks

[joe]

What's your use goal? If you don't do freeways often/rarely, I'd go with 4.10's
Nice snappy pavement off line jump gear, decent in dirt but yet manageable mpg wise on hwy if you mind your cruising speed. If in doubt on intended "real" use go with 3.73's A "decent" all around compromise gear. Does nothing excellent but does jump. dirt, tow, and hwy reasonably well. Unless freeway flying is your thing "anything" deeper than 3.31's will be a performance improvement and the bang for the buck between 3.31's to 3.54's just ain't there for my money.

[HOOT]

If you are not going to be on the highway except a few times a year I would go with 4:10 's at least and most likely more.
I'm most likely going to that or bigger with mine when it gets reworked. I'll be running 35's also for tires.

I have 3:73 in the J20 and running a 33" tire it did just fine on the highway. i use it cross country trips and even hauling cross country like that.

[swampedge]

Dana power-loks are what I use in both front and rear axles but I'm not climbing around on rocks. Jim

[Mr. Church]

I was looking at an Aussie for the rear of mine, but I know Cora the President as she is in our Jeep club. I know some people dont like the ratchet style lockers, but its a solid engagement for lower horsepower applications