355 RATIO

[383DART]

i have a 1972 cuda 340 4 speed. it has a 355 sure grip. most of the dodge & plymouth scat pack cars with 904 or 727 auto had 323 sure grip.was 355 with a 4 speed standard equipment rather than a 323 sure grip. thank's.

[72hemi]

standard for the 4 speed cars (non dana of course) was 3.23 open with 3.91 suregrip an option or 3.23 suregrip. I believe from 72 on 3.23 was the lowest factory gear in a passenger car.

[MEK-Dangerfield]

I would be shocked if 3:55's were put on 72-74 E-bodies. I think someone put those gears in there from an earlier year car.

[Moparal]

Bullitt99's car is a 73 rallye  and it has a 340 with 727 and factory 355 single trac.

[360 'CUDA]

Hi 383dart
what is the number on the case?  Is it 741 by any chance?

[73EStroker]

My 73 340/4spd Chally had 3.55 standard with 489 SG

[383DART]

Hi 383dart
what is the number on the case?  Is it 741 by any chance?

      THE CASTING # IS 2881489.

[360 'CUDA]

Ok so you have the correct case.  The option code (D56) is listed for Mopars with 3.55:1 gear ratios from 1969 to 1974. If you could come up with a broadcast sheet for that car and find that code on it you would know for sure.

[71chally416]

I've seen both a '73 Chally auto and a '73 Cuda 4 speed with stock 3.55 gears. My '71 has them too (OEM gears) but I'm not sure if they were stock. They seem to have been used in small block cars more than the big block cars that usually had 3.23's.

[ted]

standard for the 4 speed cars (non dana of course) was 3.23 open with 3.91 suregrip an option or 3.23 suregrip. I believe from 72 on 3.23 was the lowest factory gear in a passenger car.

both my 74 barracuda and 73 dart have factory 2.76s

[Alaskan_TA]

Standard & optional axle ratios for 1972 Challengers in the blue chart at this link;

http://www.hamtramck-historical.com/images/dealerships/DealershipDataBook/1972/72_Challenger0019.jpg