Differential Question

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Differential Question

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Chevrolet Forum >> Chevy Trucks, Vans & SUV's >> Silverado >> Differential Question

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Differential Question - 7/13/2008 4:44:05 PM

itlldue

Posts: 24
Joined: 7/13/2008
Status: offline

I have a 2007 Silverado with the GU5 differential, JF7 option.
Can I replace it with a GU5, JF3 differential without it affecting the computer or ABS?

(It was wrecked with 1307 miles)

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Post #: 1

RE: Differential Question - 7/13/2008 4:45:26 PM

itlldue

Posts: 24
Joined: 7/13/2008
Status: offline

Follow up -I can''t ask Chevrolet because they want the VIN number and will probably void the warranty if they know I changed it.

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In order to be old and wise, you must first be young and stupid.

(in reply to itlldue)

Post #: 2

RE: Differential Question - 7/27/2008 10:26:21 AM

itlldue

Posts: 24
Joined: 7/13/2008
Status: offline

Bump

Anyone?

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In order to be old and wise, you must first be young and stupid.

(in reply to itlldue)

Post #: 3

RE: Differential Question - 7/27/2008 12:00:12 PM

rivereye

Posts: 116
Joined: 5/23/2008
Status: offline

I do know you need to be absolutely certain the front diff and rear diff are the same gear ratio. Also, the abs sensor responds at highway speeds, and will trigger a service instruction if you do a gear ratio change. Did GM use JF7 and JF3 interchangeably,or

(in reply to itlldue)

Post #: 4

RE: Differential Question - 7/27/2008 12:04:23 PM

rivereye

Posts: 116
Joined: 5/23/2008
Status: offline

was the JF7 an upgrade performance modification, or what? Primarily, you need to know the JF3 and your front diff are the same ratio, then work from there. A 4x4 specialist shops that deals with upgrades and changes would probably be able to tell you, if the

(in reply to rivereye)

Post #: 5

RE: Differential Question - 7/27/2008 12:05:09 PM

rivereye

Posts: 116
Joined: 5/23/2008
Status: offline

interchange manual sheds no light on the issue.

(in reply to rivereye)

Post #: 6

RE: Differential Question - 7/28/2008 8:18:18 AM

itlldue

Posts: 24
Joined: 7/13/2008
Status: offline

Two wheel drive.
JF7 - 6400# rear axle
JF3 - 7000# rear axle

_____________________________

In order to be old and wise, you must first be young and stupid.

(in reply to rivereye)

Post #: 7