Smog vs Gears?
#11
10-14-2008, 08:23 AM
Hey guys, I know I have another post on here regarding another issue, but this offer just came to me from a buddy.
Hes got a 05 ram, and is offering a axle swap cause he is trading in his dodge for something else. His rear end have a eaton posi, with 4.88 gear ratio. My rear end is stock 3.55 dog leg. For my daily driver, how do you all think the ratio differance will affect my gas mileage, or for that matter CA Smog?
Hes got a 05 ram, and is offering a axle swap cause he is trading in his dodge for something else. His rear end have a eaton posi, with 4.88 gear ratio. My rear end is stock 3.55 dog leg. For my daily driver, how do you all think the ratio differance will affect my gas mileage, or for that matter CA Smog?
with 4.88 in the rear you may be limited in the front as to what is available
I don't think gearing would affect Smog in CA
except that if the 'check engine' light gets lit
for any reason on the OBD-II system
they won't pass you at inspection
I
#13
10-14-2008, 05:40 PM
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The only thing the drive shaft spinning faster would affect is your RPM's. Speed doesn't go by RPMs. You can drive around first gear red-lining and be going the same speed idling a few gears higher. It's just how fast your wheels are spinning.
Of course, I could be completely out to lunch here.
Of course, I could be completely out to lunch here.
#14
10-15-2008, 01:39 AM
The only thing the drive shaft spinning faster would affect is your RPM's. Speed doesn't go by RPMs. You can drive around first gear red-lining and be going the same speed idling a few gears higher. It's just how fast your wheels are spinning.
Of course, I could be completely out to lunch here.
Of course, I could be completely out to lunch here.
#15
10-15-2008, 07:07 AM
around model year 1998
as a cost cutting move
Chrysler began reading the vehicle speed
off the anti-lock brake sensor
mounted on the differential
which always reads axle rpm
not trans output shaft rpm like in older years
The speedo does still need to be calibrated
for the revolutions per mile
of the tires
on the DRB scanner
and many dealerships techs
don't know all the tricks for doing this
as a cost cutting move
Chrysler began reading the vehicle speed
off the anti-lock brake sensor
mounted on the differential
which always reads axle rpm
not trans output shaft rpm like in older years
The speedo does still need to be calibrated
for the revolutions per mile
of the tires
on the DRB scanner
and many dealerships techs
don't know all the tricks for doing this
#16
10-15-2008, 10:11 AM
#17
10-15-2008, 06:04 PM
Record Breaker