gear ratio

[Lugnutz65]

Fellas, all engines (230, 250, 292, 283, 327, 350 Ford, Chevy, Mopar) doesn't matter make, size or model, will have the same RPMs if the final gear is the same, same tire size, at a given speed. That assumes no clutch slip and a manual transmission.

[1966FLEETSIDE]

Awesome thanks for that valuable info tj'.I'm also veering towards tranny.it currently has a 3speed .that was converted to the floor .with a shifting pattern "H" reversed.so I don't know where that came from .lol

[Lugnutz65]

Ooops! Sorry. Two posts ago I forgot to include they have to have the same rear diff too.
You can have an engine tuned perfectly or it can run like crap. Doesn't matter. The RPMs will be the same.

[TJ's Chevy]

Originally Posted by Lugnutz65

Ooops! Sorry. Two posts ago I forgot to include they have to have the same rear diff too.
You can have an engine tuned perfectly or it can run like crap. Doesn't matter. The RPMs will be the same.

Wow like I didn't know that. lol What did I say wrong now?

[Lugnutz65]

TJ,
No foul! Nothing wrong with what you said. His original post was looking for better RPMs. I just didn't want anyone to think that the engine performance had anything to do with RPMs.
I'm not correcting anything you said. Just trying to add emphasis that it all has to do with gearing, etc.

If he's gonna bolt up an S10 T5, then it will need to be 1993 or earlier.
I read your posts and you know a lot for your young age. Keep up the good work.

[TJ's Chevy]

Originally Posted by Lugnutz65

TJ,
No foul! Nothing wrong with what you said. His original post was looking for better RPMs. I just didn't want anyone to think that the engine performance had anything to do with RPMs.
I'm not correcting anything you said. Just trying to add emphasis that it all has to do with gearing, etc.

If he's gonna bolt up an S10 T5, then it will need to be 1993 or earlier.
I read your posts and you know a lot for your young age. Keep up the good work.

Sorry if I came on offensive. Thanks for the reminder of the S10 tranny of which year to use...Somebody told me 95 and I think it was T langdon...I made a mistake of accidentally calling him to early in the morning. lol

[AcampoDave]

I'm with T.J. That 292 needs a tune up. You should be able to break 45 m.p.h with the 373 gear. Even when fully loaded.

[frankslagoon]

I have a 63 with 3:73 and an o/d. I know its 3:73 cause I looked at the ring gear. In high gear, 1:1 out of the tranny these numbers are within acouple mph.
3000 rpm= 62mph. 4000 rpm=80mph. rear tires are 235/75/15 @28 or 29 in. tall. I used a 66 rear end I'm pretty sure 63 thru early 70 will fit except for panhead bar, which not a big deal. The way my numbers work out I should get around 3000 rpm=75 mph with a 3:07 ratio. Does that sound about right guys. with the o/d I see about 2100rpm=60mph

[vince1]

Its easy figuring out your speed and RPM with the use of online calculators. If you have OD is it not suitable as is? I have the 3.07 with 4 speed and it is OK for my general use but I'd rather have a 3.73 with 5 speed or 700R4 auto. When I had the 3.73 with 4 speed it was way too slow on the highway but nice around the yard.

[TJ's Chevy]

Also something else to consider...running a taller tire will help make the gearing taller as well...for every inch taller tire they say about 10 mph is gained at same rpm. In my 66 I'm running a 30 inch tire and 3.73 gears...sm420...speedo is off a bit but I reckon 55 mph is around or just over 2500 rpm....now with a .82 od that rpm would drop to 2000(roughly). Also I wouldn't recommend a .64 od...for a stock 6 that's to much of a drop... .74 od is the tallest I'd go...6 bangers like close ratio trannys best.

[frankslagoon]

Originally Posted by vince1

Its easy figuring out your speed and RPM with the use of online calculators. If you have OD is it not suitable as is? I have the 3.07 with 4 speed and it is OK for my general use but I'd rather have a 3.73 with 5 speed or 700R4 auto. When I had the 3.73 with 4 speed it was way too slow on the highway but nice around the yard.

All the numbers I 'm given are from observed speed and RPM. except the 3:07 est. the o/d works pretty good. I have a small 283 and would preferre. 3:42s but I'm never happy with what I got. ? I also have the o/d behind a 4 sp. chevy did put the .70 o/d in the 6 cly. 3:73 trks. most of the pass. cars with the 3sp. o/d (.70) used 3:73 rear ends, but I believe that's as tail as ya could go.

[1966FLEETSIDE]

i appreciate the info fellas.if i decide to swap trannys,will an automatic bolt right on to the 292 its got?or what will? thx

[1966FLEETSIDE]

i guess it doesnt hurt to give it a fresh tune up,i did change to taller tires so that made some difference.but not where it should to my knowledge.thanks though.

[TJ's Chevy]

Originally Posted by 1966FLEETSIDE

i appreciate the info fellas.if i decide to swap trannys,will an automatic bolt right on to the 292 its got?or what will? thx

If yer not gonna be doing burnouts a T5 out of a 93 S10 with a v6 will bolt up using an adapter. Which can be purchased from Langdon's stovebolt.com. Other then that I'd recommend a richmond or tremic 5 speed.

[1966FLEETSIDE]

awsome thx tj,and that spacer goes where exactly tj?

[TJ's Chevy]

Originally Posted by 1966FLEETSIDE

awsome thx tj,and that spacer goes where exactly tj?

The spacer goes between the bellhousing and the tranny...this is for the T5...fas as I know the richmond and tremic don't need an adapter. The T5 will also require a shortened drive shaft and shifter relocate.
Edit. 93 or earlier doesn't require the spacer.

[Lugnutz65]

If you get a nice 1993 or earlier S10 T5, you can skip buying the $160 spacer and just swap the input shaft for a Jeep input shaft. That allows you to keep your original 10 spline clutch package. So you save money both ways.
See my signature for a link to my T5 pages and look around for the Jeep shaft swap page. I have also seen a thinner spacer that they sell on eBay but have no experience with that spacer. To my way of thinking the Jeep shaft swap is the perfect solution and cheapest.