I reacently bought a used GMC Sierra with a 5.3 and I need to know where I can find out what gear ratio it has? Where do I look? Any help would be greatly appriciated. <img border="0" alt="[burn out]" title="" src="graemlins/gr_burnout.gif" />

 

Look in the glovebox and look for one of these codes. What ever one you see is the gear ratio that you have. Also, if you see a G80, that means you have the factory limited slip differential.

Kent


GT4 Rear Axle: 3.73
GT5 Rear Axle: 4.10
GU4 Rear Axle: 3.08
GU6 Rear Axle: 3.42

 

Thanks for the help 1999stepside. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

 

What did you find out???

 

Well my truck has 3.42 gears with factory limited slip.

GU6 & G80

No wonder this baby is fast. <img border="0" alt="[burn out]" title="" src="graemlins/gr_burnout.gif" />

 

Anyone knows where I can find out what all the numbers in the glove box mean? Thanks <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

 

I think Fast4.8 has them all, if you find one of his posts just go to his web site in his signature.

 

Hey thanks for the help CashDudeHomie, I found the codes from Fast4.8 site. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

 

Hope they helped you out. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

 

hey whatr is better a factory limited slip or the eaton and what is the diffrence