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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: tigwelder on November 30, 2010, 06:33:28 am

Title: gear ratio 1980 chevy 4x4?
Post by: tigwelder on November 30, 2010, 06:33:28 am

1980 K-10 gear ratio code G80.

Title: Re: gear ratio 1980 chevy 4x4?
Post by: Blazin on November 30, 2010, 07:06:00 am

You will have to pull the cover, find the numbers on the ring gear, or count the ring, and pinion teeth.

Title: Re: gear ratio 1980 chevy 4x4?
Post by: rainman15 on November 30, 2010, 08:18:16 am

G80 is the code for locking differential, but that doesn't have anything to do with what gear ratio you would have.  If you have your build sheet handy look for something that starts with GQ and says something like "rear axle standard" or "rear axle optional". Give me your engine size and axle code and I can use that to pull your ratio.

Title: Re: gear ratio 1980 chevy 4x4?
Post by: topp on November 30, 2010, 09:16:38 am

And the code will only be valid if a PO did not change the rear or the ratio......

Title: Re: gear ratio 1980 chevy 4x4?
Post by: tigwelder on November 30, 2010, 10:51:45 am

only info i have is the tag in the glove box. has 350 engine ,350 turbo. thanks

Title: Re: gear ratio 1980 chevy 4x4?
Post by: 756man on November 30, 2010, 08:51:47 pm

That is the tag you need !  GU6 =3:42, GT4 = 3:73, GT5 = 4:10