International Full Size Jeep Association
Home Forums Reader's Rigs Tech Library Trail Stories FSJ-List
International Full Size Jeep Association  

Go Back   International Full Size Jeep Association > Tire Kickin' > General FSJ Tech

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 04-24-2015, 08:17 PM
Mr Carts Mr Carts is offline
258 I6
 
Join Date: Aug 22, 2011
Location: Middle Of The Mojave Desert
Posts: 256
Rebuilding my rear Diff which posi should I install?

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
__________________
1980 Cherokee WT 360 TFI Contour Fan 727 208
3.31 285/75X16 Duratrac's E rated
Reply With Quote
  #2  
Old 04-24-2015, 10:05 PM
crazydog's Avatar
crazydog crazydog is offline
350 Buick
 
Join Date: Nov 19, 2005
Location: Permian Basin
Posts: 848
I am going TrueTracs front and rear when I do mine.
__________________
1979 Cherokee - Built 401, NV4500, Dana 300, 6" BJ's Lift w/ Bilstein 5125 Shocks, Goodyear Wrangler MT/R 35X12.5R15, Front Brake Upgrade w/ GM 2500 Calipers & EBC Pads, Rear Disc Brake Conversion, Z&M Jeeps Dash Insert w/ VDO Series 1 Gauges, Tad Rack, Ramsey Hidden Winch w/ REP8000, Hydroboost, CS140

1967 J3500 - Making plans
Reply With Quote
  #3  
Old 04-25-2015, 12:24 AM
Heavy_Metal_Thunder_81's Avatar
Heavy_Metal_Thunder_81 Heavy_Metal_Thunder_81 is offline
Cherokee Outlaw
 
Join Date: Jan 10, 2006
Location: Central Valley, CA
Posts: 7,209
The Detroit TruTrac is one of the best IMO. The factory Trac-Lok was very good, too, though.
__________________
-Jonny B.
1979 Cherokee Golden Eagle - 7" lift, 35x12.5x15
AMC 360 - 4180, TFI, Headers, Dual Exhaust
TH400 - Shift Kit, Deep Pan, Aux Cooler
D20 - Twin Stick'd
F D44 - 3.54, Open
R D44 - 3.54, Lock'd

1979 Cherokee Chief - Parts
1979 Cherokee Chief - Parts
1979 Wagoneer - Sold
1981 Cherokee Chief - Cubed
Reply With Quote
  #4  
Old 04-25-2015, 06:32 AM
mokurt mokurt is offline
Grease Monkey
 
Join Date: Feb 23, 2014
Location: Hollister,Ca
Posts: 431
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.
__________________
1967 J2000
1985 CJ7
Reply With Quote
  #5  
Old 04-25-2015, 10:37 AM
acct21's Avatar
acct21 acct21 is offline
327 Rambler
 
Join Date: May 20, 2014
Location: Austin, TX
Posts: 719
+1 on the Truetrac
__________________
1990 Grand Wagoneer with HD towing package -- everything works! (for now...)
Reply With Quote
  #6  
Old 04-25-2015, 03:41 PM
FSJunkie's Avatar
FSJunkie FSJunkie is offline
The Nigel Tufnel of the FSJ world.
 
Join Date: Jan 09, 2011
Location: Not The Hot Part, Arizona
Posts: 3,983
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.
__________________
'72 Jeep Wagoneer Custom, 360 V8

I love how arguements end as soon as Ristow comments. Ristow is right...again.
Reply With Quote
  #7  
Old 04-26-2015, 11:12 AM
Mr Carts Mr Carts is offline
258 I6
 
Join Date: Aug 22, 2011
Location: Middle Of The Mojave Desert
Posts: 256
So the Tru Track is the one get.
http://www.summitracing.com/parts/dtl-912a579/overview/

Thanks
__________________
1980 Cherokee WT 360 TFI Contour Fan 727 208
3.31 285/75X16 Duratrac's E rated
Reply With Quote
  #8  
Old 04-26-2015, 11:42 AM
joe joe is offline
 
Join Date: Apr 28, 2000
Location: PNWet, USA
Posts: 22,371
Quote:
Originally Posted by acct21
+1 on the Truetrac
+2
__________________
joe
"Don't mind me. I'm just here for the alibi"
Reply With Quote
  #9  
Old 05-11-2015, 04:42 PM
Mr Carts Mr Carts is offline
258 I6
 
Join Date: Aug 22, 2011
Location: Middle Of The Mojave Desert
Posts: 256
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
__________________
1980 Cherokee WT 360 TFI Contour Fan 727 208
3.31 285/75X16 Duratrac's E rated
Reply With Quote
  #10  
Old 05-11-2015, 05:14 PM
joe joe is offline
 
Join Date: Apr 28, 2000
Location: PNWet, USA
Posts: 22,371
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.
__________________
joe
"Don't mind me. I'm just here for the alibi"
Reply With Quote
  #11  
Old 05-12-2015, 02:06 AM
HOOT's Avatar
HOOT HOOT is offline
Moderator
 
Join Date: Mar 28, 2003
Location: Taylor Mill,KY 41015
Posts: 5,592
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.
__________________
Tom Gibson
1980 J20 Utility bed truck. Factory cab and chassis truck. Many new mods for it but it will look all stock.
1985 J10 nothing special just a nice clean stock truck.
1977 Honcho "Blue" 401/400/quad. Under going major upgrades.."This is Not Your Fathers Honcho", it may not even be a Honcho anymore when done.
2017 Challenger. Very jealous of the Jeeps.
Reply With Quote
  #12  
Old 01-27-2016, 02:16 PM
swampedge's Avatar
swampedge swampedge is offline
258 I6
 
Join Date: Oct 07, 2007
Location: Melbourne Florida
Posts: 434
Dana power-loks are what I use in both front and rear axles but I'm not climbing around on rocks. Jim
__________________
1970 Gladiator with a 350, a/c and a PTO winch.

You really are judged by the dogs you have!
Reply With Quote
  #13  
Old 01-27-2016, 09:18 PM
Mr. Church's Avatar
Mr. Church Mr. Church is offline
Noob!
 
Join Date: Feb 02, 2014
Location: United States
Posts: 11
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
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Started the rear Dana70HD install. Hammer Off-Road FSJ Tech 39 02-02-2009 09:36 PM
Rear Brake removal for parking brake cable install spyderkeeper General FSJ Tech 3 12-07-2008 01:30 PM
Rear End Diff leak ??"S supercopjason General FSJ Tech 2 06-30-2007 07:50 PM
Rear Diff replacement uglyjeepling General FSJ Tech 8 02-10-2005 04:13 PM
Wide trac axles in a Wag(8 posts) Panther Drivetrain 0 08-18-2000 04:33 AM


All times are GMT -6. The time now is 12:28 PM.


Powered by vBulletin Version 3.5.4
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
corner corner