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Maybe I didn't see it right then, becuase if this were a 4.10 trans you won't even move the Metro with a 3.52. My trans came from a '94 SOHC 1.3L Suzuki Swift. See the chart, I have the same tires also.suprf1y wrote:If it was 3.2 that you saw, then you have a 4.10 trans.wrote:I know its the 3.52. I have both trans in the same model year Metro. I can go 50 mph at 2,000 rpm and hit 55 at 2,200 rpm. Now...if 3.52 repesents trans at 1:1 and 5th is ~.9 over then I'm about right. When I was rotating in fifth it was like 3.2, which expalins my confusion at the time.
If it were a 3.52, then you would see about 2.8 with a .8 fifth gear.
I will be very interested in how your car performs with that 3.79 and compared to mine. Report back when you get it in and running. It will be interesting your rpm at 50 mph as compared to the chart I posted. You running a scangage?mjspiess wrote:Ok, so I think I got it. Since my tranny's crown wheel has 72 teeth, it should be a 3.79 tranny. Woodie stated in a diff. post the gears & ratio:
Final drive 3.79
If this info is correct, 3rd gear is 1.28*3.79=4.85 rotations (what I estimated, but wasn't sure what gear). 4th gear is .91*3.79=3.44 rotations (what I estimated, but wasn't sure what gear). The only question I have is why then does the pinion on have 18 teeth & not 19? 72/19=3.79 Everything is adding up, besides the 18 pinion teeth.
This is exactly what I'm trying to say. Changing one wheel/tire size basically changes one gear ratio step. metroschultz went past the sweet spot and experienced a drop in mileage, and remember, his car is substantially lighter than yours.metroschultz wrote:I have the 3.52 in mine.
But, I also have a 1993 Metro.
When I first put the transmission in, it was great! I was easily achieving high 50s and low 60s. Bets tank - 69.8mpg.
I still had 155R12 tires.
Later I went to the 13 inch tires because 12s are getting harder to find.
I also went with 175/70R13, a wider tire. Trying to make the ride a little softer.
The ride is much better now, but the gearing is too tall and I work hard for a 55mpg tank.
I have been known to do that now that I have larger tires.rmcelwee wrote:Why not just downshift by one gear?
Whoa there Nellie! I think you misunderstood me. When I said changing the wheel size changes the gear ratio, I meant DIAMETER, tire width has nothing to do with gear ratio and will make very little difference as far as gas mileage or acceleration is concerned. I think 175's are a good minimum tire size, but I'm more interested in tires that actually grip the pavement than I am in ultimate fuel economy. I have 195/50-15s on my car and keep a set of 185/60-14's for bad weather. Didn't notice any measurable mileage change when I went to them.mjspiess wrote:Woodie is right, I think 175's are just too wide...