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Reprogramming

Tiny
MASOY
  • MEMBER
  • 2005 DODGE RAM
  • 5.7L
  • V8
  • RWD
  • AUTOMATIC
  • 121,020 MILES
Have a 1500. I swapped the rear axle because it went bad. The old axle had 3.21 gear ratio. The replacement axle has 3.92 gear ratio. I know the truck has to be reprogrammed for the new gear ratio.

Am I causing any damage driving the truck "un-programmed" to mechanic to have it reprogrammed?

Thanks
Matt
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Saturday, June 24th, 2017 AT 8:49 AM

2 Replies

Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
You should be fine.

Basically, it is like you installed smaller tires on it.

The Medic
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Saturday, June 24th, 2017 AT 10:41 AM
Tiny
STEVE W.
  • MECHANIC
  • 12,998 POSTS
You will have better pulling power, but you are going to lose some gas mileage due to the lower gearing even after it is reprogrammed to the new ratio.
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Sunday, June 25th, 2017 AT 7:00 AM

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