1973 SD Transam 4 spd 1 of 72 built

[L78steve]

Originally Posted by njsteve

3.42 was the rear end ratio for stick cars and 3.08 was for the automatic cars with or without A/C. (No A/C allowed in stick cars). All the four speed transmissions were the same internally and were no longer built by Muncie in 73.

You are quite correct- these cars are scary fast. And to think that they accomplished all this with 8.6 to 1 compression!

If there is one version to have of a SD455, it would be a stick car. (Unless you're old like me and need to be refrigerated and have the shifting done for you) :-)

The 3.08 was for auto with A/C. Auto or stick can be had with the 3.42 w/o A/C. I had a 74 SD Auto no A/C with 3.42, unless 73 was different for the auto and 3.42.