psajb

My truck seems to max out at 90 is that about right with the 4.10 rear? The truck seems to run nice and smooth and quick till about 80 then it seems to get alittle vibration and noisy and strugles to about 90. I love the truck and it runs great I'm just wondering how well it is going to pull when I put 10,000# on it in the mountains. The truck just hit 6000 miles.

thax pat

DF5152

y do u want to drive that fast?

DPG

90 is probably about right for the 4:10 differential. I have the 4:10 but I have never tried to reach top end. I've been up to 80 but I don't remember what my rpm's were. As far as towing 10,000 pounds, top end has nothing to do with with towing ability. If it did, you'd see 10,000 trailers behind Mustangs, Corvettes, and those little ricers. You won't have any trouble with 10,000 pounds behind your CTD.

bulabula

Depending on tire size, your truck should see about 106 @ 3200 rpm. (Doing the math with my tires).

My truck, with stock tires can touch 100. My OD is a little shorter than yours.

Original Junior

I broke 100 with mine on I95. It felt like she could do a little more but I don't trust the stock goodyears. She did feel much more stable than my old '00 2500.

padiesel

I can do about 105 with 265 on

bulabula

Fill out your sig block so we know what truck you have. I could say that I can do 140 with 235's on, but its not a truck.

Nevada

Have you ever driven I-80 from Laramie to Rock Springs Wyoming? Come visit us out west, you will find lots and lots of desolate, straight, flat, empty reasons.

99DodgeGuy

Got the Dually up to 100mph (160km/h) the other day while passing before I backed off, it still had more left, should do about 107 on the govenor. As for Towing I just towed our 94 Prowler 30R (about 9000# loaded with tools) up a few good grades and I love the HO with the 4.10's perfect setup for the Auto.

cquestad

Get 35's....close to 120 mph on that same straight stetch of Wyoming Interstate. Still feels like you are going slow.

DF5152

I can cruise at 85 to 90 without a problem even hear in a 120 mile paking lot.

RAMV

The Valentine 1 or Passport 8500 had better be working, the HPs around there are not nice... 10 mph over will get you a ticket and they like to sit in the centre section of the road just over hills, with their radars off. Definetly one section of road I prefer to drive sub 80, make sure you have satelite radio.....