[oino]

What gear ratio is in the s10 rear end?

[EX JUNK]

oino, on 05 February 2010 - 12:02 AM, said:

What gear ratio is in the s10 rear end?

The RPO codes for S10 rear gears are as follows:

GU4=3.08
GU5=3.23
GU6=3.42
GT4=3.73
GT5=4.10
HC4=4.56
G80=locking Differential

Jim

[RPM]

Most all of the ones we have gotten have been 3.73 ratio with a few being 4.10.

[OptimusPrime]

would that number be on the chunk?

[EX JUNK]

OptimusPrime, on 06 February 2010 - 05:36 AM, said:

would that number be on the chunk?

As far as I know, those numbers are only on the build sheet that is affixed to the glove box. At least that is where I always found them on the S10's that I have owned.

Jim

P.S. Some rear ends have two numbers stamped on the ring gear. These numbers are the number of teeth on the ring gear and the pinion. Divide one into the other and you'll have the ratio. If there are no numbers, start counting.

[dunno125]

usually 4 cyl. s-10s have 3.73 or 4.10 the 4.3 blazer i had had 3.42

[Leon renaud]

dunno125, on 06 February 2010 - 06:55 PM, said:

usually 4 cyl. s-10s have 3.73 or 4.10 the 4.3 blazer i had had 3.42

If you look near the center section on the top front of the passenger axle tube you will find the gear ratio stamped into the axle tube itself.I hope I'm making myself clear but if you clean the passenger axle tube in this area the numbers are there if I remember correctly the tooth counts are posted not 3.73 or 4.11 but the actual # of teeth on each gear