Re: [AMC-List] T-14 Overdrive

[Mark Price <markprice242@xxxxxxxxxxxx>]

I ran the nubers on your combo and mine and assuming 1-1 gearing in 4th for comparison sake and a 28" tire on my car, My gearing is steeper!
Yes it runs well and does well on mpg.
As I said I'm somewhat concerned about the .64 overdrive in the 2.95 1st gear motorsport spec trans I'm building. It specs out to about 1790 RPM at 70 mpg with a 3.31 and just over 1800 rpm with the propesed 3.42. Ideal is a about a 3.55 but this is not a "stock gear" for the S10, they go straight to 3.73. 
 I'll reserve my judgement till I get the trans in and holdoff till I drive it with the 3.31's then decide.
--
Mark Price
markprice242ATadelphia.net
Morgantown, WV


---- Jim Blair <carnuck@xxxxxxxxxxx> wrote: 
> A: I find that steep gearing works well with AMC 6 cyls. I run 3.73 with 33" 
> tires and 5 speed in my MJ and it feels about right (even though my motor is 
> fading a bit having surpassed the 240,000 mile mark)
> 
> 
> From: Mark Price <markprice242@xxxxxxxxxxxx>
> Subject: Re: [AMC-List] T-14 Overdrive
> To: amc-list@xxxxxxxxxxxx
> Message-ID: <5012620.1161873003379.JavaMail.root@web11>
> Content-Type: text/plain; charset=utf-8
> 
> 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
> 
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