Re: AMC Jeep 2.5 FI in Spirit?

["Jim Blair" <carnuck@xxxxxxxxxxx>]

A: My '86 Comanche with 4 cyl TBI and 5 speed came stock with 4.10s and 
205/75/15 tires. They even came with 4.56 in the Metric Tonne versions with 
4 cyl. No probs crusing the highway in 5th either (I did 70 mph cruising 
before the tire change, and 80+ mph after that with the .70 O/D)



On September 26, 2005 Tom Bunsey wrote:

> Frank (and a couple others) posted concerning rear axle gearing.
>
> AND THEY ARE WRONG (or maybe simply incorrect)
>
> Eagles & SX-4 with the IRON PUKE and the AMC 4-cylinder (late 1983) had 
> 3.54 axle gearing, and there were no "factory" axle options.
>
> Spirits & Concords with the IRON PUKE used 3.08 with all tranny options 
> (4-speed, 5-speed and automatics).
>
> The AUDI 4-cylinder engines used 3.08 & 3.31 with the 4-speed, and 3.31 & 
> 3.58 with automatics.
>
> 4.10 gears in a street car would result in a real "granny" 1st gear, and 
> pretty much negate any advantage of the overdrive 5th gear.
>
> The Lister that suggested 4.10 gears stated he was eunning 30" tall tires 
> in his Comanche, where such tall tires would need such a gear.
>
> But, 205/70R14 tires are about 25-1/2" tall.  BIG DIFFERENCE (no pun 
> intended).
>
> I've driven a 1982 Spirit with the IRON PUKE and a 5-speed. It was pretty 
> peppy, and it got 30+ MPG!  If you are looking for gas mileage, I suggest 
> similar ratios to what came stock (i.e., 3.08).
>
> Tom Bunsey