8 3/4 lowest gear ratio available

[Pouria]

Does anybody know the lowest ratio gear available for 8 3/4? Is it possible to custom order the gear near a specific ratio?

[green69rt]

Look at reply #15 (about.)

http://www.dodgecharger.com/forum/index.php/topic,112559.0.html

[heyoldguy]

Seems to me that generally 5.13:1 is the lowest ratio I've seen. A few years back I was running a 4.89:1

[Pouria]

Look at reply #15 (about.)

http://www.dodgecharger.com/forum/index.php/topic,112559.0.html

Thanks a lot

Seems to me that generally 5.13:1 is the lowest ratio I've seen. A few years back I was running a 4.89:1

I think you got me wrong or maybe I asked a wrong question. I need lower ratio (higher with your point of view, for example 2.5:1 or something)!

[maxwellwedge]

Yes - A question that has always been confusing depending on how you look at it.

I seem to recall a 2.76:1 or something like that.

[birdsandbees]

I have a 2.76:1 (high gear) pot in my '69 Superbee. Highway cops never liked me I can tell you that..   Think on my refurb, while I have the car torn down, I may return it to it's factory 3.23:1.

[Pouria]

I have a 2.76:1 (high gear) pot in my '69 Superbee. Highway cops never liked me I can tell you that..   Think on my refurb, while I have the car torn down, I may return it to it's factory 3.23:1.

Thank you.
May I know your full setup? Engine, tranny, HP and torque? Are you ok with the launch at start-up?

Maxwellwedge, thank you too

[John_Kunkel]

2.76 is the highest (lowest numeric) ratio ever made for the 8 3/4".

[Alaskan_TA]

The numbers confuse some folks.

The higher the number, the lower the gear & the lower the number, the higher the gear.

High sets for gas mileage & low sets for drag racing & pulling stumps with your truck.

[birdsandbees]

I have a 2.76:1 (high gear) pot in my '69 Superbee. Highway cops never liked me I can tell you that..   Think on my refurb, while I have the car torn down, I may return it to it's factory 3.23:1.

Thank you.
May I know your full setup? Engine, tranny, HP and torque? Are you ok with the launch at start-up?

Maxwellwedge, thank you too

Basically a factory stock 383 magnum, 4 gear car. Only thing not stock is the Mcleod Street / Strip clutch because I use to burn a factory clutch out in a couple high power drops. It's not a screamer off the line... but I do have a time slip around here somewhere from 1981, pulling off a 101.8 MPH 1/4 mile with it bracket racing. Definitely a highway cruiser... and why I'm probably going to put it back to a 3.23 when I restore this winter.

[AKcharger]

I've got a 2:76 pull 19 MPH on the highway...really

[A383Wing]

I got 2.76 and the best mileage I got was 24.5mpg in the Daytona

[cdr]

I took out the 3.91 & put in a 3.23, so with my overdrive .69 it is 2.23 final drive.

[c00nhunterjoe]

I have 4.88s and avg 8mpg right now. But i prefer to measure in miles per smile. Its a much better unit of measure in my opinion.

[Kern Dog]

With the loss of the Auto Shop instruction in schools, it is no wonder the latest generation of gearheads do not know the basics.
Lower gears can be thought of as lower top speed. Higher or taller gears should be thought of as ones that allow a higher top speed.
The reason that Ma Mopar stopped at 2.76 is because as the numbers get lower....From say 3.91 to 3.23, the pinion gear gets bigger. The 2.76 pinion gear is huge and barely fits in the case. To fit any gear taller such as a 2.56, 2.41 or 2.29 like GM used, the 8 3/4 case would have to be either hogged out with a die grinder or recast with more clearance for the pinion gear.

[Pouria]

I've got a 2:76 pull 19 MPH on the highway...really

Thank you for sharing your experience

I got 2.76 and the best mileage I got was 24.5mpg in the Daytona

24.5mpg?!!!! It is amazing, at what speed did you achieve it?

I took out the 3.91 & put in a 3.23, so with my overdrive .69 it is 2.23 final drive.

May I know how do you feel it runs?

With the loss of the Auto Shop instruction in schools, it is no wonder the latest generation of gearheads do not know the basics.
Lower gears can be thought of as lower top speed. Higher or taller gears should be thought of as ones that allow a higher top speed.
The reason that Ma Mopar stopped at 2.76 is because as the numbers get lower....From say 3.91 to 3.23, the pinion gear gets bigger. The 2.76 pinion gear is huge and barely fits in the case. To fit any gear taller such as a 2.56, 2.41 or 2.29 like GM used, the 8 3/4 case would have to be either hogged out with a die grinder or recast with more clearance for the pinion gear.

Correct! I have another problem as well and it is my English because I am not American Thank you for the useful info, but just for my information, isn't it possible to make smaller crown wheels instead of bigger pinions?

[John_Kunkel]

The numbers confuse some folks.

The higher the number, the lower the gear & the lower the number, the higher the gear.

High sets for gas mileage & low sets for drag racing & pulling stumps with your truck.

Another analogy is to think of it in transmission terms, low gear and high gear.