A-833 2.47 1st gear change to 3.09

DionR said
FWIW, my A833OD first to second drop is significantly worse than the 1st to 2nd drop with the 3.09:1/1:1 gear set, and I run a low compression 360. And I don't find that I have to rev it to the moon before I reach for second. I just drive it and it feels fine.

For comparison sake, my 360 has rebuilder pistons from about 1991 and they are about 1/8" in the hole. Even with the smaller combustion chambers of the MP R/T heads, I figure I am only 8.5:1. And my cam is a regrind from Bullet with 262/267 or 206/210 @ 0.050. The thing needs more compression and yet it drives fine for me.

Yeah, if memory serves, the OD 4-speed goes from 3.09 low to 1.67 second. The direct drive goes from 3.09 to 1.91.

3-speed manuals of various makes/years typically go something like 2.5 low to 1.5 second. Less of an rpm drop than the OD 4-speed, more than the 3.09 direct drive 4-speed.

By the way, the old GM close ratio 4-speeds had a 2.20 low gear. To get a 9.98 overall low gear ratio with those trannies, you needed 4.56 rear gears. And lots of people thought the close ratio GM 4-speed was the hot setup. Not without some pretty steep rear gears, though.