700R4 owners... what ring/pinion are you running?

[CentralCoaster]

Right now I have an open diff 4.11 (or 4.10) behind my 700R4 and mild 350.

I finished my converter lockup wiring, but it still tachs too much in 4th.

I'm thinking a 3.55 posi would suit me better. I want this truck to be a cruiser that I can drive anywhere, not a stump puller. I like driving fast (80-85 mph is fast for these trucks), and that's no fun taching at 2800 rpm for an hour or more. I also like getting decent gas mileage. I can squeeze out 15 mpg now at 70 mph, and 3.55s would probably help a bit more. 3.73 would be a better compromise if I ever do any towing.

I'm used to my vette purring along at 1800 rpm in double overdrive, so perhaps my idea of "taching it out" is way off.


What are you guys using?

(I have to check and see if 3.55 is even available for the 12-bolt)