Dana 35 LSD (3.07)

KingCarGuyZ said:

The Eaton Tru-Trac (912A569) is widely regarded as a great option for Dana 35's under 33's that arn't playing hard in the rocks - but near as I can tell the Tru-Trac is only offered in a 3.54 and up (numerically higher) configuration. This leaves those of us stubbornly stuck on 3.07 gears out to hang - what other options do we have?


Obligatory "Should I be on 3.07's":
The simple answer is "no" - if you are gonna spend money on lockers / LSD, you should also re-gear. That being said, I already have a ARB "RD101" 3.54 & DN front locker - so it's to late to save me. Couple the sunk cost fallacy with a desire to cruise at 80 and a burning need for more HP, the 3.07's arn't going anywhere for a while.

Now that we have that out of the way, what are your options? For helical LSD's you have:
Grip Pro GT443527
Tru-Trac (912A569)
Yukon Gear M35 YDGM35-4-27-1
all of which are 3.54 and up (that I can find) - so that leaves us with 2 options.

There was a OEM clutch based LSD called the "Trak-Loc" you can find a replacement carrier from extreme terrain or others.
OR
Go full send and get an ARB RD103 and "super 35" axle kit

Before I go accepting either compromise - anyone know the magic PN of a 3.07 compatible Tru-Trac, or other helical LSD?

Click to expand...

KingCarGuyZ said:

Possibly, but probably not. I like the cruise speed - the jeep spends a lot of time at hwy speed and the 1800-2K rpm at 80 is nice. at 31' tires, the 3.07's arn't bad and my plan is to just add HP with a Magnum swap, Diesel or turbo.

maybe the answer is "just re-gear", but I would rather stick with the 3.07's and throw a limited slip in if possible.

Click to expand...

KingCarGuyZ said:

The Eaton Tru-Trac (912A569) is widely regarded as a great option for Dana 35's under 33's that arn't playing hard in the rocks - but near as I can tell the Tru-Trac is only offered in a 3.54 and up (numerically higher) configuration. This leaves those of us stubbornly stuck on 3.07 gears out to hang - what other options do we have?


Obligatory "Should I be on 3.07's":
The simple answer is "no" - if you are gonna spend money on lockers / LSD, you should also re-gear. That being said, I already have a ARB "RD101" 3.54 & DN front locker - so it's to late to save me. Couple the sunk cost fallacy with a desire to cruise at 80 and a burning need for more HP, the 3.07's arn't going anywhere for a while.

Now that we have that out of the way, what are your options? For helical LSD's you have:
Grip Pro GT443527
Tru-Trac (912A569)
Yukon Gear M35 YDGM35-4-27-1
all of which are 3.54 and up (that I can find) - so that leaves us with 2 options.

There was a OEM clutch based LSD called the "Trak-Loc" you can find a replacement carrier from extreme terrain or others.
OR
Go full send and get an ARB RD103 and "super 35" axle kit

Before I go accepting either compromise - anyone know the magic PN of a 3.07 compatible Tru-Trac, or other helical LSD?

Click to expand...

KingCarGuyZ said:

Possibly, but probably not. I like the cruise speed - the jeep spends a lot of time at hwy speed and the 1800-2K rpm at 80 is nice. at 31' tires, the 3.07's arn't bad and my plan is to just add HP with a Magnum swap, Diesel or turbo.

maybe the answer is "just re-gear", but I would rather stick with the 3.07's and throw a limited slip in if possible.

Click to expand...

Rickyd said:

Ditch the front locker. Don't double down spending money on that combo. Get 3.73-4.10 axles for cheap

Click to expand...

Wildman said:

IMO First off he has got to decide if a engine swap is in his Jeeps future. Because as pointed out already he'll need a stronger rear axle if that is his ultimate plan.

I forget what's the break on the Dana 30? is it 3.73 or ? If he's never going to run higher than 31" tires he doesn't need super low gearing....

Click to expand...