Re: 304/290/200R4 - now V8 Fuel Mileage

[fljab@xxxxxxxxxxx]

On May 12, 2005 Jim B wrote:

> A: You also have to take into account for the size of tires on your vehicle
> when calculating gear ratios. Too many offroaders wonder where their power
> went when they slap oversize tires on. I know my own power dropped a lot
> when I put 33" on (from 26") but going to 3.73 helped that. When I switch to
> AW4, I'll probably have to drop down to 4.10 to keep adequate power.

Great point;  I did figure in for 25" tires when I posted a day or two ago.  I think that the Jeepers have more to gain/lose than we do as going from 26" to 33" or more is quite a difference.  With a passenger car, and esp an older AMC that you're going to use 14" or 15" wheels, it's more of a fine tuning tool.  

I think the rear end we're talking about in this instance (with an OD trans aka 200R4) is right at 3.54; however, if you wanted/needed to go a little off of that, you could change the size of the tires.

Jim Boone
Mims, FL

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