Quote:
Originally Posted by cleanspeed1
I learned in trucking that setting up a driveline that is geared to be most efficient in direct can save more fuel.
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+1
Isuzu had a model called the MPG+ in the 81/87 pups. the only change to the auto was the 3rd member and trans.
it was a 3.42 rear end with a direct drive 4sp.
the normal model was a 3.73 with a 14.5% O\D 5sp
fed emission MPG+ 2wd model
Compare Old and New MPG Estimates
fed emission normal 2wd model
Compare Old and New MPG Estimates
for what ever reason the CA spec MPG+ model has the 3.42 with the O\D 5sp.
there top gear is just to tall for a 60 hp engine, mpg is commonly less do to people just WOTing it in high gear and/or big tires.
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1 86 T\D trooper with rare GEN 3 rods
TRANS FIXED 
NOW DD
1 86 4WD 5sp pup is 2.3L gas, but plan on 2.2L diesel repower
1 91 trop, long term plan is a group buy of imported Isuzu 4JB1-T 2.8L I-4 engines, hoping to get price down to 2K not 3K plus
1993 sidekick my MPG toy, epa rating 26.
i get 29/31 with stock drive train.