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Dual Range® Auxiliary Transmissions 

NOW YOU DON'T HAVE TO CHOOSE BETWEEN POWER AND ECONOMY

AMERICA'S MOST POPULAR AUXILIARY TRANSMISSION

Lightruck Quality Products is Proud to Offer you the US Gear line of Quality Performance Products. When it comes to your Families and your Equipments Safety, rely on the Experts at Lightruck Quality Products to supply you with US Gear’s fine products. D-CELERATOR UNIFIED TOW BRAKE, D-CELERATOR DIESEL EXHAUST BRAKE, CYCLONE POWER FAN, DUAL RANGE AUXILIARY TRANSMISSION, TORQ-LINE GAUGE KITS, AND THE TORQ-LINE CHROME TURN DOWN TAILPIPES.

Over/Under Drive  |  Schedule Dual Range FAQ
Application Chart & Price  |  Operating Instruction
 

Dual Range Auxiliary Transmission Gear Ratio Chart

Use the instructions below to calculate Dual Range gear ratios or for Help with your particular application 

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866-794-6496

Ratios Typical Automatic Transmission Typical Manual Transmission Dual Range Auxiliary Transmission
1st Gear 2.48:1 1st Gear 6.56:1 Underdrive 1.25:1
2nd Gear 1.48:1 2nd Gear 3.58:1 Overdrive 0.80:1
3rd Gear 1.00:1 3rd Gear 1.70:1
4th Gear 1.00:1
How to Calculate:

Drive Ratio = Primary Trans. Ratio x Vehicle Differential (Ring & Pinion) Ratio x Dual Range Ratio

Example: Vehicle equipped with a 4.10 differential AND Dual Range Overdrive Transmission would have the following final drive ratio in Overdrive:

Final Drive Ratio = 1.00 (3rd Gear) x 4.10 (differential) x 0.80 (Dual Range) = 3.28
Common Automatic Transmission Ratios
Make Transmission 1st Gear 2nd Gear 3rd Gear O/D
Ford C6 2.46 1.46 1.00 N/A
  E40D 2.71 1.54 1.00 0.71
GM T350 2.52 1.52 1.00 N/A
  T400/475B 2.48 1.48 1.00 N/A
  T700R4 3.06 1.63 1.00 0.70
  T4L80E 2.48 1.48 1.00 0.75
 
Common Manual Transmission Ratios
Make Transmission 1st Gear 2nd Gear 3rd Gear 4th Gear O/D
Ford T18/19 (diesel) 4.02 2.41 1.41 1.00 N/A
  T18/19 (gas) 5.11 3.03 1.79 1.00 N/A
  ZF5 (diesel) 4.14 2.37 1.42 1.00 0.76
  ZF5 (gas) 5.72 2.94 1.26 1.00 0.76
GM SM465 6.56 .358 1.70 1.00 N/A
  NV4500 6.34 3.44 1.71 1.00 0.73

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Lightruck Quality Products distributes high quality truck parts including Ring and Pinions, Axle parts, Detroit Lockers. Our Transmission Parts include parts for ZF Transmissions, Remanufactured Transmissions not just rebuilt transmissions. We handle Jeep Transfer Cases as well as all other models of Transfer Cases. We also handle Timken bearings, Sachs Clutch kits and Firestone Airbag Suspensions.

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