3.55:1 in my Ranger
3.84:1 in my ION
3.84:1 in my ION
Whats your gear ratio?
- Thread starter Chris142
- Start date
- Status
3.73s in the Jeep, turns 1750 at 60mph in 4th (OD). It's great in the hills (pulls 7% grades without downshifting), but would get much better mileage turning closer to 1600 at 60.
I cobbled together a saturn SL1 with a "wrong" DOHC transmission that turned 2850 RPM instead of 2300 at 65 MPH. Still got 42 MPG.
I don't believe gear ratios matter for MPG that much, unless one has a strongly nonlinear cam, timing curve, fuel enrichment, etc. With variable valve timing, turbos, and other modern conveniences powerbands should be getting even wider.
I don't believe gear ratios matter for MPG that much, unless one has a strongly nonlinear cam, timing curve, fuel enrichment, etc. With variable valve timing, turbos, and other modern conveniences powerbands should be getting even wider.
It's not an issue of how wide the powerband is, it's an issue of increased pumping losses when revving higher than needed (with less throttle opening) in a gas engine. It matters a bit less in an unthrottled diesel. Were that Saturn to have the "correct" transmission, you might have seen 45mpg.
And it drops dramatically with displacement and number of cylinders. Small 4 bangers have much less pumping loss at any speed or throttle opening than big V8's.
VVT setups minimize this even more.
VVT setups minimize this even more.
Camaro 3.73
S10 3.42
Sunfire I have no clue.
S10 3.42
Sunfire I have no clue.
Originally Posted By: 440Magnum
Arrgh, stupid browser. Ignore previous post.
1966 Dodge Polara 2.93 rear gear
1969 Dodge Coronet R/T 3.23 rear gear
1999 Jeep Cherokee 4-sp 4x4 3.23 front (and rear)
2001 Jeep Cherokee 3.55 rear gear
2008 Ram 1500 3.92 rear gear
2005 PT Cruiser who knows, who cares, what does it matter anyway ;-p
Did you change the gearing?
I thought cherokees with the AX-15 had 3.07's front and rear?
My 2000 Cherokee has 3.55s open. I'd love to get a rear LSD.
Arrgh, stupid browser. Ignore previous post.
1966 Dodge Polara 2.93 rear gear
1969 Dodge Coronet R/T 3.23 rear gear
1999 Jeep Cherokee 4-sp 4x4 3.23 front (and rear)
2001 Jeep Cherokee 3.55 rear gear
2008 Ram 1500 3.92 rear gear
2005 PT Cruiser who knows, who cares, what does it matter anyway ;-p
Did you change the gearing?
I thought cherokees with the AX-15 had 3.07's front and rear?
My 2000 Cherokee has 3.55s open. I'd love to get a rear LSD.
An AX-15 XJ should have 3.07/3.08 gearing. AFAIK, you can't get anything between 3.08 and 3.55 for the front D30 (no 3.23 or 3.42 available).
The XJ 3.07 gearing is worthless in Colorado, [censored] epa mileage junk. I had our cherokee re-geared to 4.10 and man what a difference, stays in the powerband so much better.
Originally Posted By: subiedriver
The XJ 3.07 gearing is worthless in Colorado, [censored] epa mileage junk. I had our cherokee re-geared to 4.10 and man what a difference, stays in the powerband so much better.
I once drove a friend's XJ that had 31s on the stock 3.07 gears. That wasn't much fun, 5th gear was basically useless.
The XJ 3.07 gearing is worthless in Colorado, [censored] epa mileage junk. I had our cherokee re-geared to 4.10 and man what a difference, stays in the powerband so much better.
I once drove a friend's XJ that had 31s on the stock 3.07 gears. That wasn't much fun, 5th gear was basically useless.
SpecV: 4.13 LSD
My suzuki: 5.13
the others not sure
My suzuki: 5.13
the others not sure
Last edited:
Current Mustang is 3.55's (100 dollars extra over 3.23's from the dealer.
ps had 4.30's in my 84.. 1st gear was awesome.
I forgot I had the OASIS for the Ranger and the Fusion
3.73 in the Ranger.
3.464 in the Fusion.
3.73 in the Ranger.
3.464 in the Fusion.
8.8 rear, open carrier with 3.55 gears.
TO: 440Magnum my mpg went up cause it gets the rpm to 1400 rpm at 35 mph cruseing, in top gear. with a 3.55 it wouldnt do that. i know it sounds strange, but it does that. dont for get a 4.1 puts less load on the engine. i dont get on the hiway
My '68 Polara........... 2.76:1 open 60 mph roughly 2100 rpm
My '09 G8GT............ 2.92:1 LSD 60 mph roughly 1600 rpm
Ed B.
My '09 G8GT............ 2.92:1 LSD 60 mph roughly 1600 rpm
Ed B.
Richmond has an available ring and pinion gear ratio for Ford 9".
7.00!
7.00!
- Status