RPO CODES

[MrMarty51]

A guy over on Roundup is scrapping out a K2500 pickup.
I was wondering what the gear ratios is on that truck.
Had him snap a pic of the sticker.
I know nothing about them codes.
Can someone please tell me what gear ratios this truck has.

Thank You in advance.

 

[BIGR]

GT4 code is a 3:73 gear.

 

[BIGR]

 

[MrMarty51]

Next question, my truck at 70MPH is right about 2,000 to 2,100 RPM.
With the 3:73 gearing, whats other peoples tachs running at about 70 ?
Is it worth switching over to the taller 3:73 gears ?
Roundup is probably about 100 miles over from MC so I’d have that fuel plus whatever we can negotiate for price on his rear differential. I’d take the complete unit not just the gears.
Next think IDK if the rear out of his is a full floater.

 

[MrMarty51]

Yes, that truck does have the full floaters.
But does the K2500 pack as heavy of rear axle as the K3500 ?

 

[BIGR]

Next question, my truck at 70MPH is right about 2,000 to 2,100 RPM.
With the 3:73 gearing, whats other peoples tachs running at about 70 ?
Is it worth switching over to the taller 3:73 gears ?
Roundup is probably about 100 miles over from MC so I’d have that fuel plus whatever we can negotiate for price on his rear differential. I’d take the complete unit not just the gears.
Next think IDK if the rear out of his is a full floater.

My 2006 Chevy Duramax with the 6 speed Allison and 3:73 rear gears is turning 2000 RPM's at 77 mph if I recall correctly.

 

[dbrannon79]

iirc my 95 runs about 2200 give or take at 70 with 3:73's it has 265-75-16 all-terrain tires. but isn't yours a 4x4? you would need to swap both to 3:73 otherwise you wouldn't be able to use the front axle at all.