3.91s in my 340 now!

[33IMP]

They use a couple of different 1st ratios. Mine is 3.35:1.

Yeah, that's the box I want. .69 overdrive fifth, correct? The 2.95 would be okay too. Straight eights make pretty good lowend torque, flathead rpm, not so much.

 

[mopowers]

I love the 3.91's in my 340 '68 Dart. 4.10's would probably be better though since I run a 275/60/15 tire, but it's just a street cruiser. 340's love a short gear and a good converter, that's for sure.

 

[Rude72*]

when a torque converter is advertised as a "3200 stahl" (or any other rpm range they pick), that is in a certain situation with a certain engine. So if somebody says "3200 stahl" and that is behind a 440 making 500 ft lbs of torque, your 340 might only see 2500 rpm's of stahl out of that same converter.

... And what that means to you is with that combo, and not enough stahl and gears... it will feel lazy up to a certain point, till it builds rpm's.

Thank you for the explanation. This car (now with the 3.91 gears) doesn’t feel lazy, at all.