Print Page - Gear Ratio

Title: Gear Ratio
Post by: Mudgrunt on January 08, 2014, 08:14:48 PM

I have a 1999 Silverado 1500 4 wheel drive how do I figure out what gears are in the rear end.

Title: Re: Gear Ratio
Post by: 355REDNECK on January 08, 2014, 08:23:44 PM

take rear end cover off and jack one side up leaving one side down and spin the side that is up and wait till u see numbers on the gears then take the big number and divide it by the little one

Title: Re: Gear Ratio
Post by: Crazymays77 on January 08, 2014, 08:24:16 PM

Jack it up rotate the tire and count how many times the driveshaft turns to one full rotation of the tire

Title: Re: Gear Ratio
Post by: J.C. on January 08, 2014, 08:30:43 PM

Check the glove box for RPO codes.

GU6 is 3.42
GT4 is 3.73
GT5 is 4.10

Title: Re: Gear Ratio
Post by: Mudgrunt on January 13, 2014, 08:27:05 PM

Thanks for the help I have 4.10's

Title: Re: Gear Ratio
Post by: ProGrade on January 14, 2014, 04:55:54 PM

Quote from: Mudgrunt on January 13, 2014, 08:27:05 PM
Thanks for the help I have 4.10's

im surprised!

Title: Re: Gear Ratio
Post by: Mudgrunt on January 14, 2014, 06:36:54 PM

That's what the RPO codes showed it's a nice surprise.

Title: Re: Gear Ratio
Post by: duel1985 on February 09, 2014, 04:02:29 PM

Yeah me too. It must have been a special order. They normally have a or 3.73 3.42 you got lucky on that...

WeGotMud

Projects & Parts => Garage/Tech => Topic started by: Mudgrunt on January 08, 2014, 08:14:48 PM