I had a '70 Coronet 318 2v. Pulled an SOB 16' and got a consistent 12 mpg @
60 with a 2.76 axle. Plenty of power. I would pass people on 2-lanes while
towing and never even need to kick down, so I'm not sure the 3.91 would make
all that much difference. Had a lot more low-end torque than my 305 4v in my
caprice, though they were both rated, as I recall, right at 160 hp.
Dan Weeks
> From: "Weimers" <[EMAIL PROTECTED]>
> Reply-To: [EMAIL PROTECTED]
> Date: Mon, 7 May 2001 12:42:16 -0400
> To: Multiple recipients of VACList <[EMAIL PROTECTED]>
> Subject: [VAC] Re: Transmission Oil Temp
>
>
> ----- Original Message -----
> From: [EMAIL PROTECTED]
> To: Multiple recipients of VACList
>
>> If you would change that rear end ratio to a 3.91 to 1, you would take the
>> pressure off the transmission and also pull a lot of at t good speed. I
>> have changed the pickups to this ratio and actually improved the gas
> mileage
>> with a 318. just returned from pulling a 24 ft gooseneck horse trailer.
> from
>> OKC to Lexington KY with a 318 overdrive auto and 3.91 to 1 ratio. Got 14
>> pulling against a SE wind all the way..
>
>
> I don't have an overdrive transmission in the '68. I don't know what ratio
> it's running, but I'd say it's either 2.76 or 3.23. If I can find parts, I
> might step it up a ratio or two. It's a higher compression engine than the
> newer ones. I understand that the newer low compression engines respond very
> well to a numerically higher axle ratio. Higher compression engine run
> better at low RPM than low compression engines do, from what I've read. I
> don't think I'd want to go as high as 3.91 without the overdrive
> transmission. At least the change over would be easy since it has the 8.75
> inch axle.
>
> Maybe since I added the transmission cooler I won't have any more trouble
> ......one way to find out!!
>
> MARC WEIMER
> Punxsutawney, PA - Home of the Groundhog
> #15767
> 1963 Globe Trotter
> 1971 Globe Trotter
> http://users.penn.com/~mweimer/weimer.html
>
>
>
>
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