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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

 

 

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