So, the total range is about the same. The 5 speed has a marginally shorter 1st and a marginally taller 5th when you count the final gear. 1st and 2nd are almost the same; 3rd is a little shorter in the 5 speed; high gear is a little taller; and the 5 speed's 4th splits the difference.
I'm just not seeing a transmission-related reason for the city fuel economy rating to suffer. What else was included with the option package that had the 5 speed?
........crap, I just realized I left this message unposted, all ready to go an an abandoned tab in my browser. I referenced it in a post I've made since, too, thinking that I had already posted it.
Maybe the test protocol left the 5 sp in a lower gear than the 4 sp?
I'd actually like to pull a few gears out of my 5 sp. I skip shift all the time and a trans with 1-3-5 would be fine (I'm a flatlander though). I wonder how much trans efficiency gain there would be by having 4 less gears constantly meshing.
Old EPA 23/33/27
New EPA 21/30/24
lol i wish my chevette had another gear... at 60 mph its at 3Krpm in 4th... it sounds like its about wound out, can deffinately tell when i stomp on the gas and it takes off fast when im goin at that speed...
there was an optional 5 speed, the more powerful diesel engines got that standard and was an option for the gas cars...
My truck has a 4 speed (87 S10 2.5l 4 cyl. zero options) and after my tweaking, got as high as 29.5 hwy mpg turning 1000 rpm for every 20 mph (before I changed axles and lost 6 mpg off the top (with the same gearing too. wtf)) next fall I plan on swapping it for an 5 speed off a truck at school. the 4th (and last) gear in it now is the same ratio as most 5-speeds 4th gear (1:1) we'll see how that goes. any reduction in highway rpms should help and tho it's only rated at 90 hp, power isn't a problem: it can top 80 mph carrying 1400lbs (almost half it's own weight).
1991 Toyota Pickup 22R-E 2.4 I4/5 speed
1990 Toyota Cressida 7M-GE 3.0 I6/5-speed manual
mechanic, carpenter, stagehand, rigger, and know-it-all smartass
"You don't get to judge me for how I fix what you break"