It was an option in all years in the rear axle, in 2003 the rubicons had standard lockers in both front and rear.
RotorsRotors
The only factory front axle that came in a 2001 Jeep Wrangler is a D30.
The ratio is on a tag on front and rear axle between 2 of the cover bolts
The front axle did not have limited slip from the factory.
That is the axle vent hose. It ties off to the body above the axle.
American Axle 9.25
It depends which model Wrangler and which axle (front or rear) you're speaking of. The standard setup was a Dana 30 front and Dana 35 rear. The Wrangler Rubicon, however, had Dana 44 front and rear axles which are a much stronger setup than the Dana 30/35 found in other models.
Front axle is a 9.25 American Axle Rear axle is a 10.5 American Axle
What size axle does a 99 wrangler sport have
Front axle is a Dana 30, rear axle is a Dana 35. There are a few Jeeps that have Dana 44's front and rear but this was a rare option.
36mm