1984 Dodge Truck differential

1984 DODGE TRUCK
84,000 MILES • 6 CYL • 2WD • MANUAL
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RAYGUN1
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  • 1 POST
I have got A manual 3sd with overdrive. I would like to know if i can change the rear end to a lower ratio , because it is geared to high.
Mar 24, 2010 at 7:37 PM
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CARADIODOC
  • ASE Certified Mechanic
  • 34,321 POSTS
  • ASE Certified Mechanic
You already have a real low axle ratio. The overdrive is there to make up for it at highway speed. In the 1970s, the 4spd didn't have an overdrive gear. 4th gear was a 1:1 ratio. In your transmission, 3rd gear is the 1:1 ratio, so driving in 3rd gear is the same as driving in 4th gear in the 70s.

You can change the gear ratio but you're better of looking for a different axle because the ring and pinion set is expensive. Setup is critical too to prevent gear noise.

caradiodoc
Mar 28, 2010 at 4:43 AM
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