Which gear ratio

[440gtx1967]

Which gear ratios do you have on your stock 440 with stock heads, cam, carb and auto transmission...

I am confused as why Plymouth only had the 323 as optional gears on the 440 in 67..

 

[AR67GTX]

I thought a 3.55 was available as an option but maybe it came later.

 

[Jerry Hall]

I think the choices were 3.23, 4.10 with 3.23 being standard on the GTX. I also think you could order higher gears in the high 2's. In the Dana 3.54 was the highest gear. I to am unsure about 3.55's.

 

[dadsbee]

Interesting as the rear axle in the back of my Bee came out of what I remember was a '66 Charger... but it could have been anything 1966 in the junk yard at the time. 2.94 Suregrip 741 case.

 

[Jerry Hall]

Interesting as the rear axle in the back of my Bee came out of what I remember was a '67 Charger... but it could have been anything 1967 in the junk yard at the time. 2.94 Suregrip 741 case.

All GTX'S with 8 3/4's were 742 housings. The 741 housings were for the small blocks.

 

[R413]

1967 GTX with automatic was 2.94 and 3.23 only
1967 GTX with 4speed was 3.54 only.

 

[Jerry Hall]

I have a 742 case, 3.55 sure grip with factory gears, but don't know the date code.

 

[PROSTOCKTOM]

A 3.23 is a really nice, all around, driveable gear set to run with a big block. The key word is driveable. After that it's a choice on a gear set for more performance or a taller (lower numerical number) for more highway speed at a lower rpm. I think Mopar had it right to start with a 3.23 back in that time period.

Tom

 

[Jerry Hall]

1967 GTX with automatic was 2.94 and 3.23 only
1967 GTX with 4speed was 3.54 only.

Does that mean if you ordered 4.10 gears in 67 that you got a Dana? I remember that when I ordered my 67 Satellite 383 4-speed car, I was asked what gear ratio, but no longer remember the choices.

 

[R413]

Here is the deal, You couldn't order 4:10 gears from the factory in 1967 Chrysler Corp Passenger cars.

you could get dealer installed gears in whatever ratio they had, and trucks had many ratios.


Has anyone ever seen a 1967 GTX coded for 4:10 gears on the fender tag or broadcast sheet? I never have.


I will be the first to mention the 1967 RO and WO super stock cars had all sorts of racing gear ratios available, but those don’t count here.

 

[GTX JOHN]

1967 GTX with automatic was 2.94 and 3.23 only
1967 GTX with 4speed was 3.54 only.

I remember when we ordered one new and there were only 3.23 or 2.94 on auto.
Suregrip was optional = I think only about $50.
I "think" 3:23 was standard and 2:94 was a no cost option.
My 67 Hemi 4 Speed had a 3:54 and there were no other options.
Suregrip was standard on all Dana 60 Cars as well as Dual Point Dist. even
on 440 cars equipped with 4 speeds. .

 

[Cheapsunglasses]

I like 3.55s, but you have to run an overdrive. I ran 3.23s on my stock 440 with a 4 speed, it didn’t feel like it had the torque a 440 is known for. I put 3.55s in it, and I’m a lot happier with it. Of course you have to take in consideration of your driving, if you are still a child 3.55s are great, if you act like an adult and only go out for Sunday drives, 3.23 is fine


With a 0.72 4th gear, 27” tire, and 3.55s, I can run 80mph at 2500 rpm

 

[33 IMP]

My 69 runner came with 4.10, the ONLY gear available .

 

[33 IMP]

I like 3.55s, but you have to run an overdrive. I ran 3.23s on my stock 440 with a 4 speed, it didn’t feel like it had the torque a 440 is known for. I put 3.55s in it, and I’m a lot happier with it. Of course you have to take in consideration of your driving, if you are still a child 3.55s are great, if you act like an adult and only go out for Sunday drives, 3.23 is fine


With a 0.72 4th gear, 27” tire, and 3.55s, I can run 80mph at 2500 rpm

80 mph in my car was a taste over 4000 rpm.

 

[Cheapsunglasses]

80 mph in my car was a taste over 4000 rpm.

Ok, what transmission?

 

[33 IMP]

Ok, what transmission?

727. A12 car.

 

[BeepBeepRR]

Here is a good read... Not sure how accurate but some info.

https://www.hemmings.com/stories/article/mopar-8-3-4-inch-rear-ends

 

[Runcharger]

When I daily drove these cars I found a 3.23 440 setup was awesome for burning up the highway going 250 miles to work or ratting around town. I could run it up to 140MPH when I felt like it and they still ran good in the city. 3.55 is too low for the type of highway driving I do.

 

[Dave6T4]

A buddy bought a new 1968 Road Runner with optional 3.55 Suregrip in 8 3/4" , so I think this is first year for them. 1969 saw more ratios become available. My new 383 Super Bee came with factory 3.91 Suregrip 8 3/4" . You could now get 4.10's in a Dana 60 (standard on A12 cars). I read of people having 3.73's in their 8 3/4's, but this was never a factory gear. Either aftermarket, or just a mistake. I think this was a GM ratio.

 

[Darter6]

A12 car.

We swapped a A12 Dana for a 8 3/4 when the A12 owner was trading it in back in 1970.Put the Dana in my brothers 68 R/T.
My 66 Charger had a 2.94 Sure Grip in it when I got it.Stock poly 318 car.
Gear ratio (for me) depends on the area you live.Flat,straight,mountains,hills and the type of driving you do.