Re: [AMC-List] T-14 Overdrive

[Mark Price <markprice242@xxxxxxxxxxxx>]

Thanks for pointing the need for the 3.31 or steeper axle with OD.
You have to be carefull not to overdo, er, under gear the car!
I run a 3.31 with T-5 and about a .8 overdrive right now. [255/60/15 tires] So figuring this ends up geared about the same as a 3.08 normal tired car that puts it at about a 2.46 final drive. 
It does real well with this combo.
When I put the new T5 with .64 overdrive in I intend to move up to an S-10 two wheel drive, disc brake rear axle with 3.42 ratio. I think I may end up under egared though as this will end up at about 2.04 final in OD. Maybe it will work with torque of the EFI 4.0L, but now that I do the numbers I  may have to look for a steeper geared axle. The two wheels drive S-10 axles measure in about 54 3/8" this is about 2" narrower then the stock American axle. I'll probably run spacers for the time being, but as I run a wheel with 4 1/4" switching to a 3 1/4" backspace wheel at a later date will likely happen as they are a standard aftermarket wheel at that offset.
   If anyone needs a 3.31 American axle, I should have two coming up for sale.
The one in the car has a sslightly turned axle tube, but works fine, it is twingrip and complete. The spare is an open axle from a 199 auto car, had 43K on it it is open and will need brakes I assume as it has sat for a while now.
--
Mark Price
markprice242ATadelphia.net
Morgantown, WV


---- Bob Hodson <rhodsonscrambler@xxxxxxxxxxxxx> wrote: 
> I have a 68 American that I converted from T-96 to T-14 with overdrive. 
> I did the
> conversion back in 1980 and kept the 3.08 gears. I had to use the
> linkage for the
> T-96 and readjust the shifter. I had to modify the transmission support 
> and the mount was about an inch further back. I was not to impressed
> with the mpg as when
> there is a 30% reduction, the rear end equates out to a 2.16. With
> 1-bbl, points and
> bias belted tires the mileage was not what I expected.
> Today, it is a different story. The 199 now as a 2-bbl carb, motorcraft 
> electronic
> igination, radi tires and the rear end is now a 3.31. With a 30%
> reduction, the rear
> end equates out to a 2.32. What difference this made. I drove this 68
> White American
> to the NAMDRA meet this past Sept and average 23 MGP driving around 65
> mph.
> We just purchased a new 2006 Caravan and it gets 23mpg on the highway.
> I think that
> 23 mpg on a 68 199 with 172000 miles with not rebuilt is pretty damn
> good.
> 
> 
> 
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