Newbie here

[glfirefighter144]

codes in the glove box starting with g are the gears, gu6 i know is 3.42 and if it has g80 that is factory locker,
if it is anything else, i'll look it up for ya

and they do put 14bolt 6 lug axles in half tons, but they are far and few between

 

[Greg]

Straight-forward gear/axle RPO codes:
GQ1 -- AXLE REAR, STD RATIO
GT4 -- AXLE REAR, 3.73 RATIO
GT5 -- AXLE REAR, 4.10 RATIO
GU4 -- AXLE REAR, 3.08 RATIO
GU5 -- AXLE REAR, 3.23 RATIO
GU6 -- AXLE REAR, 3.42 RATIO
G80 -- AXLE REAR, LIMITED SLIP (POSITRACTION)

HC4 -- AXLE REAR, 4.56 RATIO

here ya go.

 

[99z28monster]

Thanks guys. The previous owner was saying he replaced the rear axle with the one that is in the truck now and that the gearing was different from the front. I am going to guess that the front is 3.73 and the rear 4.10s. I cant find 4.10 gears for the front I found 4.11s would that hurt anything?

From what I have been told the trucks seems to be lifted already I have not seen it in person and wont for another 5-6 months. I am guess it has cranked front end and 3/4 ton springs. The truck has 265/75/16 front and 285/75/16 rear so that's something else that needs to be fixed soon. Thinking a nice set of 35s and new wheels will fix that problem.

 

[glfirefighter144]

well you can change the rear if you know the front haven't been changed to match the front, or have a shop check your gear ration in the rear and have them match it,
and with the dfference in gear ratios, i hope they at least pulled the front driveshaft

and thanks for the codes Greg

 

[99z28monster]

everything is still connected up front. Would it mess up the transfer case or anything if they did not pull it and just drove it in 2wd?

 

[glfirefighter144]

well if it is disengaged it shouldn't, but i have heard stories of people driving them and the actuator was stuck engaged, but it should be fine, just wondering

 

[99z28monster]

well if it is disengaged it shouldn't, but i have heard stories of people driving them and the actuator was stuck engaged, but it should be fine, just wondering

oh well I have a line on a 4l60 with t case for 400 might get it just to have a spare tcase.

 

[99z28monster]

hmm just realized it has newer style mirrors on it + 1 for me. Also found out the tires that are in decent shape suck two flats -2 for me. Also that one front tire is 285/65/16 and the opposite side rear is the same size and flat. the other two tires are 265/75/16 so -2 all together thats only -3 for me.

 

[MIHELA]

If you give me the vin I can decode it for you.