[KopterDoctor]

I just bought an 06 with a 6 spd. I drove it up to 75 mph and I don't believe I can go any faster! This thing is turning major RPM's.

I am hovering around 2 grand or more at 65 mph.

I was hoping to make a long trip in this truck but I like to drive 75-79 MPH on the interstate. I am sure it will tow great but dang! I will have to add time to my trip! I am used to my old PSD. I could run 75 80 all day without winding it out too much.

So how fast will you drive for a long distance?

 

[07white59]

my truck is a 07 5.9 with 3.73 AT and a smarty, it will top out at 115mph stock.
i drove my truck over the weekend for 170 miles at 80-90mph, no problems at all.

 

[mjd91]

I have a 2000 and mine is at about 2grand or a little more at 70 but my dads 08 turns a little more than mine too.

 

[07white59]

mine is at 2000 at 70 and 2100 at 75mph

 

[KopterDoctor]

I must have really low gears.

I guess there is no way to determine gear ratio without jacking it up and counting rotations or calling the dealer.

 

[1BadOilBurnerN-Lv]

if i remeber right im at about 2100-2200- 85-95:w:

 

[KopterDoctor]

if i remeber right im at about 2100-2200- 85-95:w:

Holy Cow! I am doing that at 65! What gives! Are all 6 speeds this way?

 

[NickBeek]

You have 3.73 gears ( the only ratio available on '06 manual) it will redline at about 98 mph or so. You can run it at 75 - 80 all day long, but your mileage will suffer. You'll get used to it. And yes it does tow quite well.eelout

 

[CPrince09]

My friends truck is the same way but he has the 4.10's and he redlines at 90. running 70mph he is turning like 2300 i think...?

 

[1998dieselman]

My 06 six speed will top out at 107 mph with 35" tires running a hypertech program, its reved right out, sure don't take long to get to that speed!!

 

[KopterDoctor]

You have 3.73 gears ( the only ratio available on '06 manual) it will redline at about 98 mph or so. You can run it at 75 - 80 all day long, but your mileage will suffer. You'll get used to it. And yes it does tow quite well.eelout

Thanks, that is good info. I drove 80 today just to do it. I was at 2550 and yes, my mileage was suffering big time.

 

[Diesel_Nuts]

Man, I can run 80 all day long, under 2000 rpm's. I have 3.73's, 37's, and it's an automatic though.

 

[Watchdog]

I have an 06 with 6 speed 3.73 gears and top out at 3200 rpm about 105 110 area anything over 2200 rpm starts cutting in to the fuel milage a lot. I wish I could get an aux. overdrive unit but can't afford it right now.

 

[Wicked-one]

Don't feel pissed. My F-550 has 4.88s in it and it'll turn Ooohh 2700 at 70 then Ummm 3000RPMs!!! at 80-84!!!!(it's gov. at 84.) Thank god my 05 Cummins has 3.73s.

 

[Babyfat]

my 06 runs 65 mph at 2000 rpms it has 3.73, I run it at that pulling my camper 22k just got back from a 5 hour trip.

 

[youngcummins08]

my 96 with 3.54 is at 2000 rpm at 74 mph. They are coming out with 3.42 gears for the dodge 2500 with AAM axels. Better for mileage

 

[AH64ID]

Thanks, that is good info. I drove 80 today just to do it. I was at 2550 and yes, my mileage was suffering big time.

Its not the rpms that kill the mileage as much as the brick wall your pushing at 80.

 

[DieselDog05]

I have the 373 ratio in mine. AfterI got the Gear Venders unit in (it's like having a 7th gear) I tried it out one day, it was accelerating like crazy in 6th with the GV unit engaged. Then when it reached 115, everything shut down, boost fell, egt falling etc. I'm pretty sure the ecm is programed to shut the fuel off after reaching that speed. Has anyone else had that experience?

 

[KopterDoctor]

How much was the gear vendors overdrive?

Has it saved you on fuel?

 

[DieselDog05]

It was alittle over $2900., plus $500 something to have it installed at a local tranny shop. The installation figure was less because I did the wiring myself (I'm very picky about that, so I did it). After I watched the shop owner do the install, I discovered I could have done that to, but would have to take precise measurements to the driveline shop for the shorter piece.
My mileage has gone up by about 3 mpg, but that is on the low side as I just can't resist mashing on the thottle all the time. Before the GV my rpm was about 2200 @ 70 mph, and now it's dropped to 1750 at that speed.