Bob
I'm running 3.31's with a 700. At highway cruise speed I feel that the motor is on the ragged edge, and I don't have a high performance cam. I believe that cruise RPM is right at 1700+ . I'd suggest you go even 1 gear set lower than
3.36. Either the 3.42 or 3.55 if its available. It might make a slight difference in cruise MPG but around town I'd bet the 3.42 or 3.55 would do better than what you are gettin with the 2.56.
On 11/4/06, Karl Groves <[EMAIL PROTECTED]> wrote:
IMO, a 2.56 gear in the rear and a 700R4 is too low. Even for a daily
driver, I'd run 3.42 gears with a 700R4.
That's gotta feel like it is lugging at 1,400 RPMs.
Karl Groves
Master Certified CIW
http://www.karlgroves.com
Grayscale Content Management System:
http://www.grayscalecms.com
> -----Original Message-----
> From: Bob Haggard [mailto:[EMAIL PROTECTED]]
> Sent: Saturday, November 04, 2006 7:41 AM
> To: [email protected]
> Subject: [Chevelle-list] ring & pinion
>
> Any bad experiences with Yukon gears and Auburn Posi? Since
> I finished my car in June I have been running the stock 2.56
> rear end with RamJet 350 and 700r4 transmission and at 60 mph
> in lockup mode it is only turning 1,400 rpm's. Replacing the
> 2.56 with 3.36 will increase the rpm's to 1,840 which will
> make the engine run better. This car is a highway cruiser
> that won't see the drag strip anytime soon. I am averaging
> 20 mpg and hope this doesn't change much.
> Bob Haggard
>
>
>
>
--
Rick Schaefer
72 TPI El Camino
