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What is stock gear ratio?

GT4      Rear axle, 3.73 ratio
GT5      Rear axle, 4.10 ratio
GU5      Rear axle, 3.23 ratio
GU6      Rear axle, 3.42 ratio
 
cadboy1 said:
When I first got my 02, the dealer had 3 on the lot fully loaded to chose from and they all had 4:10s.

When I ordered my 03, I ordered 4:10s  :love:

Yep, same here - way more of the 02 Z71s had 4.10s than 3.73s, at least when I was looking.
 
GU4 axle Rear - 3.08 Ratio
 
My 05 Z66 has GU6 and G80 so I have 3.42 and locker. I think they switched to standard 3.42 in 05. Not sure though just figuring since my 05 has it.
 
MS03 2500 said:
GU4 axle Rear - 3.08 Ratio

Hoh-lee-crap! No wonder I get such bad mileage! Time to convince the wife that we need a gear job.... 3.08s with a 6" lift and 34's, no bueno. Probably tough on the truck too I would imagine. It's surprisingly not all that much of a dog for having 3:08's and a lift. I never even looked at that because it seems to be "peppy" enough..... But that's just not good.

Thanks for the info man!
 
2012 Z71 6 speed with tow package and 3.42 - and I must admit, I usually drive with the "tow/haul" switch engaged.  I like the extra hold in each gear...

Michael
 
Hello anyone know if the front differential on a 2003 Z71 have a locker also please let me know thank you
 
Hello anyone know if the front differential on a 2003 Z71 have a locker also please let me know thank you
NO
No 4wd avy, any year, any generation ever had a LOCKER front end.

ONly the rear could get the optional locker as RPO code G80 clearly seen on the glovebox option label.
 
I found out I have full locker when I activate the 4x4 low the fronts become fully locked and the rear has autoloader g80 when one tire spins they both lock up but only when going under 20min which is how it should work
 
Unless someone installed an aftermarket locker in the front, you have an open differential like the rest of us. Sometimes both front wheels will spin, but most of the time not. The Gov lock (G80 option) was garbage compared to most true lockers but ok for most.
 
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