Thanks Tom let's try and see how pricey this setup would be with 4.88 replacement you just recommended.

Please if you see something missing let me know...

Pricing summary: (detailed parts info after this summary)
Front Axle assembly, Disc Breaks, Electric Lockers, $1336.50
Rear Axle assembly, Disc Breaks, Electric Lockers, $1231.20
Replacement Front, 4.88 Rings & Pinions, $229.95
Replacement Rear, 4.88 Rings & Pinions, $229.95

GRAND TOTAL: $3027.60 (All new parts)

Subject: New Military-Grade Jeep Dana 60 and Dana 44 Axle Assemblies
Available exclusively from Mopar Performance - Jeep Wrangler military-grade front and rear axle assemblies for Jeep Wranglers. These tough, genuine Jeep assemblies are designed for the military Wrangler ( J8 ) and provide the next level of off-road performance for Wranglers. They come fully assembled and well equipped with 4.10 gears, JK wheel speed sensors, and massive, heavy-duty disc brake calipers and rotors. The high-pinion Dana 44 front axle is ready for bolt-in on all 2007 & newer Wrangler’s. The Dana 60 rear axle is configured for leaf spring mounts*.
Specifications:
Axle Ratio: 4.10
Wheel Mounting Surface Width: 65.4”
Wheel Bolt Pattern**: 5 on 5.5”
Rear Axle Tube Diameter/Thickness: 3.5” / 0.35”
Front Tube Axle Tube Diameter/Thickness: 2.5” / 0.31“(25% thicker than JK Dana 44)
Rear Brake Rotor: 13.8” Diameter x 0.87” Thick, Vented
Front Brake Rotor: 13.25” Diameter x 1.1” Thick, Vented
P5155083 - Jeep Wrangler Dana 60 Rear Military Axle Assembly, Leaf Spring Mounts, Limited Slip Differential, Large Disc Brakes, 1.5” – 35 Spline Axle Shafts
List: $2995
P5155084 - Jeep Wrangler Dana 44 Front Military Axle Assembly, 2007 JK Suspension Mounts, Open Differential, Large Disc Brakes
List: $4495
These axles are an outstanding upgrade for off-road use and those planning to run larger tires. Tell your off-road Jeep enthusiast about this exclusive offer from Mopar. Upgrade those stock axles to military-grade Jeep axles today!
* Adaptation of the rear axle to fit the suspension of any Jeep vehicle is the responsibility of the purchaser.
**5 on 5.0” Wrangler wheels will not fit these axles. Commonly available 5 on 5.5” x 16” or 17” diameter wheels are required to clear the large brakes.

Reguarding speedo, I'm not sure how that works but isn't those values set in the ECU with the Starscan tool. please enlight me. I don't know much about this any info would be great. If it's a lost cause be as critical and as analytical as possible so no one else on this forum waste time with this setup.

Thanks for all the input

I am skeptical of web stuff, but I have seen more than one post about the JK front having bending issues like the "not quite a 44" fronts of the TJ rubi. Any truth to this?

$1000 for a bent front axle??? Wow. I wonder if there are actually idiots buying them?

For the amount of idiots out there I'm sure they did.

Considering the number of yahoos w/ big off road egos running 35+" tires on these axles and wheeling them "hard" (banzai-ing through trails, throttle happy and all that) I am surprised we are not hearing of More problems.

FWIW, I know of folks bending other axles from the same sorts of abuse.

I Also know many that are not having any problems w/ Any axles and getting to same destinations as the axle bending yahoos.

Anything is possible but 33" tire equipped sfa KJ's should be fine w/ pretty much any axle combo they can come up w/ if wheeled in a sane manner. (whatever that means)