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Gear ratio

Tiny
JASONPYZO
  • MEMBER
  • 1993 CHEVROLET SILVERADO
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 167,000 MILES
I am rebuilding the rear end and was wondering what the draw backs would be if I replaced the 3.42 gears with 3.73. I noticed when I pull me trailer it has a hard time starting off, I do not tow everyday. But was just wondering if that would be wise or would it kill my gas mileage or any other unforeseen issues that I do not see? The reason I am rebuilding the rear end is getting ride of the open carrier and going to limited slip. I would appreciate any information, Thanks
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Wednesday, June 22nd, 2016 AT 10:38 AM

3 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
It will give you a little more low end power but it will also surely put a big hit on your fuel mileage. It will also make your speedometer incorrect.
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Wednesday, June 22nd, 2016 AT 12:11 PM
Tiny
JASONPYZO
  • MEMBER
  • 87 POSTS
Ok cool, I appreciate that. I got one more question, the gears that are in it right now show little to no wear do you think I show put fresh gears in or would it be fine to use the original ones?
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Wednesday, June 22nd, 2016 AT 2:31 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
If they show no wear, they should be fine. They are not a high wear item.
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Wednesday, June 22nd, 2016 AT 2:36 PM

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