Trucks:  
   Parts:  



Alternator

Axle Housing, Rear (Rear)

Axle Housing, Rear (Front)

Bell Housing

Cab

Charge Air Cooler (ATAAC)

Complete Vehicle

Cut-Off

Door Assembly

ECM

Engine Assembly

Fifth Wheel

Flywheel

Fuel Tank

Hood

Power Steering Gearbox

Radiator

Rears (Front)

Rears (Rear)

Sleeper

Starter

Tag Axle

Transmission Assembly

Transfer Case Assembly

Wheel

Parts

 
PartsDifferentialsAxle Ratio Chart
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Axle Ratio Chart
RING GEAR AND PINION TEETH TO RATIO

PINION TEETH
Ring
Gear
Teeth
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 4.20 3.50 3.00 2.625 2.33 2.10
22 4.40 3.67 3.14 2.750 2.44 2.20 2.00
23 4.60 3.83 3.29 2.875 2.56 2.30 2.09
24 4.80 4.00 3.43 3.000 2.67 2.40 2.18 2.00
25 5.00 4.17 3.57 3.125 2.78 2.50 2.27 2.08
26 5.20 4.33 3.71 3.250 2.89 2.60 2.36 2.17 2.00
27 5.40 4.50 3.86 3.375 3.00 2.70 2.45 2.25 2.08
28 5.60 4.67 4.00 3.500 3.11 2.80 2.55 2.33 2.15 2.00
29 5.80 4.83 4.14 3.625 3.22 2.90 2.64 2.42 2.23 2.07
30 6.00 5.00 4.29 3.750 3.33 3.00 2.73 2.50 2.31 2.14 2.00
31 6.20 5.17 4.43 3.875 3.44 3.10 2.82 2.58 2.38 2.21 2.07
32 6.40 5.33 4.57 4.000 3.56 3.20 2.91 2.67 2.46 2.29 2.13 2.00
33 6.60 5.50 4.71 4.125 3.67 3.30 3.00 2.75 2.54 2.36 2.20 2.06
34 6.80 5.67 4.86 4.250 3.78 3.40 3.09 2.83 2.62 2.43 2.27 2.13 2.00
35 7.00 5.83 5.00 4.375 3.89 3.50 3.18 2.92 2.69 2.50 2.33 2.19 2.06
36 7.20 6.00 5.14 4.500 4.00 3.60 3.27 3.00 2.77 2.57 2.40 2.25 2.12 2.00
37 7.40 6.17 5.29 4.625 4.11 3.70 3.36 3.08 2.85 2.64 2.27 2.31 2.18 2.06
38 7.60 6.33 5.43 4.750 4.22 3.80 3.45 3.17 2.92 2.71 2.53 2.38 2.24 2.11 2.00
39 7.80 6.50 5.57 4.875 4.33 3.90 3.55 3.25 3.00 2.79 2.60 2.44 2.29 2.17 2.05
40 8.00 6.67 5.71 5.000 4.44 4.00 3.64 3.33 3.08 2.86 2.67 2.50 2.35 2.22 2.11 2.00
41 8.20 6.83 5.86 5.125 4.56 4.10 3.73 3.42 3.15 2.93 2.73 2.56 2.41 2.28 2.16 2.05
42 8.40 7.00 6.00 5.250 4.67 4.20 3.82 3.50 3.23 3.00 2.80 2.63 2.47 2.33 2.21 2.10
43 8.60 7.17 6.14 5.375 4.78 4.30 3.91 3.58 3.31 3.07 2.87 2.69 2.53 2.39 2.26 2.15
44 8.80 7.33 6.29 5.500 4.89 4.40 4.00 3.67 3.38 3.14 2.93 2.75 2.59 2.44 2.32 2.20
45 9.00 7.50 6.43 5.625 5.00 4.50 4.09 3.75 3.46 3.21 3.00 2.81 2.65 2.50 2.37 2.25
46 9.20 7.67 6.57 5.750 5.11 4.60 4.18 3.83 3.54 3.29 3.07 2.88 2.71 2.56 2.42 2.30
47 9.40 7.83 6.71 5.875 5.22 4.70 4.27 3.92 3.62 3.36 3.13 2.94 2.76 2.61 2.47 2.35
48 9.60 8.00 6.86 6.000 5.33 4.80 4.36 4.00 3.69 3.43 3.20 3.00 2.82 2.67 2.53 2.40
49 9.80 8.17 7.00 6.125 5.44 4.90 4.45 4.08 3.77 3.50 3.27 3.06 2.88 2.72 2.58 2.45
50 8.33 7.14 6.250 5.56 5.00 4.55 4.17 3.85 3.57 3.33 3.13 2.94 2.78 2.63 2.50
51 8.50 7.29 6.375 5.57 5.10 4.64 4.25 3.92 3.64 3.40 3.19 3.00 2.83 2.68 2.55
51 8.67 7.43 6.500 5.78 5.20 4.73 4.33 4.00 3.71 3.47 3.25 3.06 2.89 2.74 2.60
52 8.83 7.57 6.625 5.89 5.30 4.82 4.42 4.08 3.79 3.53 3.31 3.12 2.94 2.79 2.65