Gear Ratio Change (3.31 to 3.73) 5.0L FX4
06-26-2016, 04:52 PM
#51
Size Matters
Thread Starter
06-30-2016, 08:54 PM
#55
Size Matters
Thread Starter
Picked up the truck today. Here's the results:
City Driving - performance (stop light to stop light) is night & day different. Much less throttle position required to start & keep the vehicle moving in traffic
Highway driving at 70 mph - engine RPM have increased from 1500 to 1800 RPM
Hills - well we don't really have any of those in Florida, but it no longer constantly downshifts from 6th to 5th when climbing an overpass
Gas Mileage - unchanged. Still 17.6 MPG (combination of City & Highway driving)
Interesting Note - reflashing the PCM was NOT required. No CELs, ABS or Traction Control lights - nothing. Just had to recalibrate the speedometer with my Hypertech Speedometer Calibrator.
I was originally quoted $2,400 to regear the axles from 3.31 to 3.73. Much to my surprise the dealer charged me less - $1,601.82 labor + $684.04 parts = $2,285.86.
City Driving - performance (stop light to stop light) is night & day different. Much less throttle position required to start & keep the vehicle moving in traffic
Highway driving at 70 mph - engine RPM have increased from 1500 to 1800 RPM
Hills - well we don't really have any of those in Florida, but it no longer constantly downshifts from 6th to 5th when climbing an overpass
Gas Mileage - unchanged. Still 17.6 MPG (combination of City & Highway driving)
Interesting Note - reflashing the PCM was NOT required. No CELs, ABS or Traction Control lights - nothing. Just had to recalibrate the speedometer with my Hypertech Speedometer Calibrator.
I was originally quoted $2,400 to regear the axles from 3.31 to 3.73. Much to my surprise the dealer charged me less - $1,601.82 labor + $684.04 parts = $2,285.86.
Last edited by tmcolegr; 06-30-2016 at 08:57 PM.
The following 4 users liked this post by tmcolegr:
06-30-2016, 10:19 PM
#58
06-30-2016, 11:59 PM
#59
Senior Member
Picked up the truck today. Here's the results:
City Driving - performance (stop light to stop light) is night & day different. Much less throttle position required to start & keep the vehicle moving in traffic
Highway driving at 70 mph - engine RPM have increased from 1500 to 1800 RPM
Hills - well we don't really have any of those in Florida, but it no longer constantly downshifts from 6th to 5th when climbing an overpass
Gas Mileage - unchanged. Still 17.6 MPG (combination of City & Highway driving)
Interesting Note - reflashing the PCM was NOT required. No CELs, ABS or Traction Control lights - nothing. Just had to recalibrate the speedometer with my Hypertech Speedometer Calibrator.
I was originally quoted $2,400 to regear the axles from 3.31 to 3.73. Much to my surprise the dealer charged me less - $1,601.82 labor + $684.04 parts = $2,285.86.
City Driving - performance (stop light to stop light) is night & day different. Much less throttle position required to start & keep the vehicle moving in traffic
Highway driving at 70 mph - engine RPM have increased from 1500 to 1800 RPM
Hills - well we don't really have any of those in Florida, but it no longer constantly downshifts from 6th to 5th when climbing an overpass
Gas Mileage - unchanged. Still 17.6 MPG (combination of City & Highway driving)
Interesting Note - reflashing the PCM was NOT required. No CELs, ABS or Traction Control lights - nothing. Just had to recalibrate the speedometer with my Hypertech Speedometer Calibrator.
I was originally quoted $2,400 to regear the axles from 3.31 to 3.73. Much to my surprise the dealer charged me less - $1,601.82 labor + $684.04 parts = $2,285.86.
