1997 V10 RPM's

I wind 2nd gear all the way up to 60+ MPH. If you aren't winding it out, you aren't using the power it has available.

!st gear is good for a little over 30 MPH, but you can wind it out a little higher if 2nd a too tall for a really steep climb.

For the most part, just mash the pedal to the floor, and let it upshift. Remember those shift points, and those are conservative downshift speeds as well. The PCM won't let you overspeed the motor.

I would have one installed.

https://www.summitracing.com/search/part-type/tachometer-gauges/engine-type/v10?N=4294904100

I have a 98 on that chassis (or one very similar). If you know your rear end ratio, you can do math to figure out the relationships. I think I have a 4.10 rear axle ratio, and I think that may have been the only option with the E-SuperDuty chassis of the era, but I'm not positive about either point. If it's an E-350, there options may also have been different.

At any rate, I agree with carringb; let the computer figure out the shifts, and don't be afraid to let the engine go like gangbusters when climbing hills. It may sound as though it's going to thrash itself to pieces, but it won't and the powerband is at relatively high RPMs. For descending, downshift as needed to keep control without overusing the brakes.

Those obdii plug in gauges have rpm readout I have one on mine. Haven't done the measurements your looking for

Get a Scangage best thing u can get for that eng

Thanks for the input everyone, I appreciate the helpful information.

Transmission is built to do it's job and does it well. Drive it in drive.

Compared to today's transmissions, your 20 year old 4R100 isn't always the sharpest kid in school. Using "overdrive off" is a good idea to prevent hunting from 3rd to 4th. If you have an E-Super Duty (aka 1997-1998 E450) you have 4.63 rear axle gears. When I had mine 55 in 2nd was about all I felt comfortable with, and I often held it in second on steeper hills. If left in drive it would often shift to 3rd, and the large gear split between those gears would make me lose speed.

Thanks again everyone, this info really helps.

I never run the hills in od or lot of bridges always D3 If to much 2 also u can over ride OD with using foot feed then when u get back to flat OD is there like 1 or2 bridges just override it