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Prior to trading in my 2002 5.4 V8 SCREW 3.55, I recorded some rpm data to compare to my 2013 3.5 EB 3.73. Data is recorded below.
I wanted the 3.73 differential for towing and was hoping to keep the highway rpm's close to what I was used to with the older truck which is exactly what happened. I am on the cusp of my 1000 mile no tow break-in so I can't speak to how the engine tows yet in comparison to my older truck but I do not expect that I will be disappointed.
I like having the top three gears available for towing on the new truck. The 2002 would really scream when I had the OD locked out and had to downshift into 2nd gear to maintain highway speed on an uphill grade.
I wanted the 3.73 differential for towing and was hoping to keep the highway rpm's close to what I was used to with the older truck which is exactly what happened. I am on the cusp of my 1000 mile no tow break-in so I can't speak to how the engine tows yet in comparison to my older truck but I do not expect that I will be disappointed.
I like having the top three gears available for towing on the new truck. The 2002 would really scream when I had the OD locked out and had to downshift into 2nd gear to maintain highway speed on an uphill grade.
55 mph | 60 mph | 70 mph | |
2002 5.4L 3.55 - 4th (OD) gear | 1425 | 1600 | 1900 |
2002 5.4L 3.55 - 3rd gear | 2050 | 2300 | 2750 |
2013 3.5L EB 3.73 - 6th gear | 1500 | 1600 | 1875 |
2013 3.5L EB 3.73 - 5th gear | 1800 | 2000 | 2650 |
2013 3.5L EB 3.73 - 4th gear | 1875 | 2350 | 3200 |