S-10 gears
 

I was just wondering what gear ratio's S-10 owners are running in there 3rd members. My '97 w/2.2 5sp has 411's out back. I hooked up a SG 2 since I don't have a tach, & seen at 55mph, I running around 2400rpm.. That seems a little high. I figured the truck came out with low gears to compensate for the 4cyl, but I'm beginning to wonder. I guess I shouldn't complain seeing the mpg I'm getting, but it would be nice to see it under 2000rpm. If it only came out with a 6sp.

Dad has the 3.73s in his (ZR2). I've seen everything from 3.08s to 4.11s. There may be even a wider range than that.

That must be a fairly tall overdrive 5th, to get 2400 @ 55 with 4.11s. I've seen 1:1 4-speeds with shorter tires running right at 3 grand @ 55...

...not conducive to good fuel mileage! :(

Here is a place that you could look around and maybe find something...

Highest you could go is a set of 2.41s, but you'd probably be lugging it. There is a lot of choices for that 10 bolt

GM / GMC / Chevrolet S10 Blazer Rear Differentials GM 7.5 Rings & Pinions Auto Parts: YG GM7.5-273, YG GM7.5-308, YG GM7.5-323, YG GM7.5-323T, YG GM7.5-342, YG GM7.5-342T, YG GM7.5-373, YG GM7.5-373T, YG GM7.5-411, YG GM7.5-411T, YG GM7.5-430, YG GM7

i hhve 29 inch tall tires 3.58's and a .85 fifth in my 98 taco ( it is my lowest geared vechile)
at 55mph it runs a 1950rpm.


most new 6 speeds are over rated they give u an extra gear in between 3rd and 4th and about the same top gear as they 5 speed counter part.

My tires are 29" too. I'm not sure what the 5th gear ratio is. I guess I'm pretty close on the rpm's. I'd still like it under 2000, but I'm stuck with what I have.

I have no idea what the gearing in my rear differential are!

I have the most plain/stock S10 ever - 1995 2.2l 5-speed.

I am planning on swapping my engine for a 2.4l Mercedes diesel. When I do that, I will need to talk to the local hot-rod guy who knows rear axels. He should be able to help me change the gearing to take advantage of diesel's torque to maximize fuel economy.

most extended cab s-10's with automatics have 4.10 rear ends in them, the ones with manual transmissions have 3.73's

See now I'm confused, as I thought Chevy followed a strict pattern with their S-10 diff's...

4.11 for 2.2 + auto
3.73 for 2.2 + 5spd
3.43(.42? .45?) for 4.3 + auto
3.07(.10? .08?) for 4.3 + 5spd

That's what I saw, somewhere. Maybe in my service manual, although that was 98-03.

3.42 and 3.21 from the little bit i know, i wish i could find the s-10 forum that i used to belong to.

lost it when my lap top crashed

In the old days it was 3.42 and 3.08. Nowadays??? Who knows... The site Red linked to a few posts back gives the whole range, I believe...

At the dealership I worked at, the salesmen liked to show their prowess in filling in the little squares that varied from the default on the order blank - after they had asked whether you were looking for mileage or were going to pull a trailer, of course... ;)

I was just one of the mechanics, but once in a while they would use me as a guinea pig, to order in a special hot-rod version of one rig or another. Then they would let me do the pre-delivery on it, so at least I would get to drive the thing!!! Had a Trans Am scare the snot out of me once... :eek:

I did find the web site where i got tons of information on my S-10, if you have all the numbers that are on the sticker in your glove box door, you can find out everything about your S 10

S10Forum.com

i am not a big fan of the site as a whole but it did provide me with information that was helpful to me.

RPO Codes.com- GM option codes,GM rpo codes,Regular Production Options,General Motors options

most useful link if you still have the RPO tag in your glovebox. Extremely comprehensive list.

Oh, I LIKE it! That one went into my Favorites!!! :)

I guess I got one of the odd ones or rare ones, because it is a 2.2, 5sp, w/411's. It barks the tires real well too.

judging from your 90 day mpg average, those gears are serving you well!

I just traded my '00 Sonoma, extended cab with a 2.2, 5 speed, and 4.10 rear. I think it was common for extended cab trucks, whether auto or manual. Not gonna swear to it, but two other guys in this area with similar trucks also had the same powertrain setup.

Got 21-23 in town and topped out at 29mpg on the highway. Kinda miss that... ah, well.