Axle Comparisons

Comparison charts between a JK D44 and TJ D44

Front Axles

 

Front Comparison Chart

Component	JK D44	TJ D44	Bronco 71-78 D44
Part #	P5153825
Lug Pattern	5 x 5	5 x 4.5
Factory Gear Ratio	4.10
Overall Length (Width)	65.5 in
Axle Tubes (OD x thickness)	2.5" x .25"
Axle Shaft - Outer Diameter			1.250 in.
Axle Shaft - Outer Spline Count	32		19
Axle Shaft - Inner Diameter			1.312 in.
Axle Shaft - Inner Spline Count	30		30
Axle Shaft - Outers Thinnest Point	1.200 in.	1.20 in.
Axle Shaft - Inners Thinnest Point	1.240 in.	1.240 in.
Axle Shaft - U Joint			5-260x
Pinion Position	High Pinion	Low Pinion
Pinion - Inner Bearing Surface (Race)	1.630 in.	1.380 in.
Pinion - Outer Bearing Surface	1.375 in.	1.185 in.

 

Rear Axles

• Rear JK Dana 44 Pinions are similar to Dana 60 pinions.
• JK D44 Axle shafts are slightly longer
• JK 44 is a Dana 47

Component	D35C	JK D44	TJ D44	XJ/MJ '87-'90 D44	ZJ D44	CJ Narrow D44	95-'01 Explorer Ford 8.8	Isuzu Corp 12-bolt (1988.5 and 1995 Amigos)	D60
Type		Cast	Cast	Cast	Aluminum, C-clip
Lug Pattern			5 x 4.5	5 x 4.5	5 x 4.5		5 x 4.5	6 x 5.5
Factory Gear Ratio		4.10	3.07, 3.55
Ring Gear Size		8.5	8.5	8.5	8.5	8.5	8.8		9.75
Overall Length (Width)		65.5 in	60 in.			50.5 in.		59 in.
Axle Tubes (OD x thickness)	2.64"	3.15" OD x .25"		2.76"
Axle Shaft - Spline Count		32	30	30	30	19, 27, 30 (post '72)
Pinion - Inner Bearing Surface (Race)		1.625 in.	1.375 in.
Pinion - Outer Bearing Surface		1.310 in.	1.125 in.
Weight (lbs)	175		230	230
Pros							Disc Brakes	Disc Brakes
Cons	Weak C-Clip						C-Clip

 Sources:

http://jeep.off-road.com/jeep/article/articleDetail.jsp?id=277046

http://www.4wheeloffroad.com/techarticles/drivetrain/131_0804_jeep_wrang...

http://77cj.littlekeylime.com/mrnimages/eb_axles.gif

http://www.dynatrac.com/images/pdf/New_Gen_D44_comparison_chart.pdf

http://members.cox.net/jkorda/jeep/mods/front44.html

http://www.bc4x4.com/tech/2000/highpiniond60rear/highpiniond60rear.cfm