Rear end swap

Tiny
HAIRBRUCH
  • MEMBER
  • 2008 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 18,600 MILES
My truck is a 1500. I would like to to put a 2005 rear end in it even though it is 1" shorter than the 2008. Will it work or do I have to do some modifications?
Saturday, June 15th, 2019 AT 7:04 PM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

No, it will not. You need the exact differential with the exact dimensions.

Otherwise, the truck will not track correctly and the ride will be affected.

The gear ratio must also match the front as well.

Roy
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Sunday, June 16th, 2019 AT 4:41 AM
Tiny
HAIRBRUCH
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  • 3 POSTS
What if the differential gear is one size bigger?
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Sunday, June 16th, 2019 AT 5:56 AM
Tiny
HAIRBRUCH
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  • 3 POSTS
The gear ratio in my truck was a 3.72. I want to put in a 3.41 ratio. The carrier gear is the same size but the pinion gear is just one tooth more than the 3.72. What would happen?
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Sunday, June 16th, 2019 AT 8:07 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
It would not stay in four wheel drive. It would pop out and damage the transfer case.

Roy
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+1
Sunday, June 16th, 2019 AT 8:13 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
The gear ratios must be the same. You need to find an exact differential to replace.

Roy
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Sunday, June 16th, 2019 AT 1:48 PM

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