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[Mike2909]

When I bought the Wrangler TJ  it was advertised with a Detroit TrueTrac LSD in the rear diff.

According to the gen info I received on Birtys this LSD does not need the Mopar LSD friction modifier.
I received the build sheet for the TJ from Chrysler and it has my rear diff down as
DRKS Heavy Duty Dana 44 Rear Axle
DSAP Trac-Lok Differential Rear Axle

How (if possible) do I identify which LSD I have in the diff. The PO I bought the TJ from told me one of the POs that competed with the TJ told him he had the Detroit LSD fitted when modifying the rear axle ( disc brakes) Jeep to compete with the TJ.

Or should I just add friction mod or could that do any damage to the Detroit ( if that is fitted)?
He changed the front axle to Dana 30 from a Cherokee when he fitted the lift kit etc.

[bigjeepzj]

When you take the diff cover off
the diff will look more like this



not


info at http://www.off-road.com/jeep/project/jeep-wrangler-tj-build-g2-gears-detroit-truetrac-mit-drivetrain-work-53362.html

[Mike2909]

It looks like this-- minus two teeth 

Changes ahead I reckon.

[georgen]

That pics a Standard LSD trac loc

[Wildfire]

Mike
that's an 'Open' diff not an LSD by any type.

If it is jacked up - with both wheels off the ground - turn one wheel and watch the other;

if it rotates the opposite direction - Open Diff
if it rotates the same direction - locker or LSD.

Sorry Bud!

[Mike2909]

Mike
that's an 'Open' diff not an LSD by any type.

If it is jacked up - with both wheels off the ground - turn one wheel and watch the other;

if it rotates the opposite direction - Open Diff
if it rotates the same direction - locker or LSD.
Sorry Bud!

No worries , it's too late to complain now and I who checks inside the diff when you buy?
You are correct though, when jacked up it rotates opposite way. I couldn't understand why someone would replace the original Dana 44 with a  Dana 35 just for the disc brakes seemed a stupid decision.
I was only going to change the fluids and when I took the cover off the 2 teeth were laid in the bottom, it was still driving OK but I kept hearing a clunk from the rear.
The metal tag on the diff does say LSD though.

[Mike2909]

Considering my options now as to what to replace/change on the diffs /axles.
 I can't afford Willos axles  and don't have the required knowledge to fit them anyway.

I am thinking  , go back to a 44 on the rear and then try and find a 44 for the front, add lockers and then hopefully that will survive the 35s.
I have a 5 speed manual with a NV231J transfer case with 272 ratio. The diffs presently have 3 73 ratios so I need to do some homework to find out what that all means 

[georgen]

The Trac loc looks like an open diff, but has clutch packs on each side out of view, now ive opened the pic to full size you can see end of shafts so as you say its been swapped for a 35, normally have rubber bung for oil fill not threaded plug like 44. also 44 has a large strengthen rib running down passenger front side of  diff housing plus does not have C clip shafts.

[gazjeep]

When we had to re-gear our Auto TJ, went for 4.10 gearing & true trac LSD's front & rear. Young Bryn will testify to their effectiveness yesterday at Harptree comapred to open diffs

Parts from Randys Ring & Pinion ordered by me & fitted by Bubba (Kev aka MJS) on here. He has all the bearing pulling gear & you wont find a better or cheaper job ...... he's done loads.

Good £ / $ rate at the moment too 

[Mike2909]

Why did you go for 4.10 gearing ?

[Mike Pavelin]

Mike
that's an 'Open' diff not an LSD by any type.

If it is jacked up - with both wheels off the ground - turn one wheel and watch the other;

if it rotates the opposite direction - Open Diff
if it rotates the same direction - locker or LSD.

Sorry Bud!

Nope, that's definitely a trac-Loc.

[isle of man]

and find a 44 for the front, add lockers and then hopefully that will

Good luck finding one that won't cost £££ to get it under the TJ !!

[Mike2909]

and find a 44 for the front, add lockers and then hopefully that will

Good luck finding one that won't cost £££ to get it under the TJ !!

Good Luck is something I am in short supply of.
What is the next best option for the front 30 or 35?

[isle of man]

and find a 44 for the front, add lockers and then hopefully that will

Good luck finding one that won't cost £££ to get it under the TJ !!

Good Luck is something I am in short supply of.
What is the next best option for the front 30 or 35?

What is your current tyre size? And current lift ?

[Mike2909]

and find a 44 for the front, add lockers and then hopefully that will

Good luck finding one that won't cost £££ to get it under the TJ !!

Good Luck is something I am in short supply of.
What is the next best option for the front 30 or 35?

What is your current tyre size? And current lift ?

Tyres 35x10.5x16  with 6" lift.

[isle of man]

For a 35" tyre you're asking much of a 44, you need to truss if the wall tube is cheese, also the shafts need to be RCV to be safe, and thats some lift you have !!

[Mike2909]

For a 35" tyre you're asking much of a 44, you need to truss if the wall tube is cheese, also the shafts need to be RCV to be safe, and thats some lift you have !!

Bought it as such with 4" suspension and 2" body lift.

[Mike2909]

Picture before I bought her and before PO spent all his £s on her/

http://www.nl4x4.co.uk/newphotos/displayimage.php?pid=63&fullsize=1

[Ezz]

I'm running a standard TJ 30 up front apart from an ARB locker and 4:88, perfect for 35" tyres and stock 44 rear, also with an ARB, in the almost 2 years of froading I've only bust 2 front uj's, I was going to upgrade the front shafts, but I've just got a pair of JK rubicon 44's, it'll be a while before they go on my TJ, but when they do my current axles will be up for sale..

[Ezz]

I can't afford Willos axles 

Nobody can

[gazjeep]

Why did you go for 4.10 gearing ?

Its a 3 speed auto ........Only running 31's & a 2" OME lift

[Bulldog67]

I can't afford Willos axles 

Nobody can

 

[Mike2909]

I'm running a standard TJ 30 up front apart from an ARB locker and 4:88, perfect for 35" tyres and stock 44 rear, also with an ARB, in the almost 2 years of froading I've only bust 2 front uj's, I was going to upgrade the front shafts, but I've just got a pair of JK rubicon 44's, it'll be a while before they go on my TJ, but when they do my current axles will be up for sale..

There was  JK Rubicon breaking on ebay but the axles had already been sold.
Did the stock rear come with LSD originally and you changed to ARB locker or is that not possible?
I have found a 44 rear at a scrappy near me ( U pull it) I am going down today to check the ratio see if it matches my front. They are only asking £80 but have to remove myself- worth taking a risk on it I think.

[Mike2909]

Would a Chrysler 8.25 rear axle with disc brakes, out of a 2003 Cherokee fit in the Wrangler and is that a strong axle. The 44 at U pull it is bent as in rear end smash. There is however a 2003 Cherokee CRD with the Chrysler axle.

[Ezz]

I'm running a standard TJ 30 up front apart from an ARB locker and 4:88, perfect for 35" tyres and stock 44 rear, also with an ARB, in the almost 2 years of froading I've only bust 2 front uj's, I was going to upgrade the front shafts, but I've just got a pair of JK rubicon 44's, it'll be a while before they go on my TJ, but when they do my current axles will be up for sale..

There was  JK Rubicon breaking on ebay but the axles had already been sold.
Did the stock rear come with LSD originally and you changed to ARB locker or is that not possible?
I have found a 44 rear at a scrappy near me ( U pull it) I am going down today to check the ratio see if it matches my front. They are only asking £80 but have to remove myself- worth taking a risk on it I think.

That's the JK, axles where sold because I bought them
jk axles are 5 inches wider than a TJ.
My TJ had ARBs in it when I bought it..