Towing with a 99 GMC Suburban 7.4L
A buddy is selling his 99 Suburban 4x4 with the 7.4L (454) for a great price. Not sure of the model but it’s loadd with leather. It’s in very good condition except a little paint peeling on the ro...
Forum Discussion
wnjj wrote:blt2ski wrote:
Scott, I came back from Duvall at 40-45k gcw in dump truck. Mind you it is a 175/330 non turbo 7.3 V8! Fortunately, 7 forward gears. In 1st which is 10.08-1, 2800 rpm at switch back motor starts slowing down to 2100 as I straighten back up, motor speeds up.....thought I was going to have to back down with 5 yrs of soil in truck, 12k equipment trailer behind me!
Needed clean shorts after that.
Never as of yet have I stalled that rig on a hill! My auto trans 454s, stalled them out all the time. One was a 4ad, into 4lo, no big. Rwd dually, burned up transmissions every 30k like clockwork, with 5k fluid fluid change.....talking COMPLETE fluid change including fluid into the TC!
Marty
Maybe not practical on a steep slope, but could you unload the equipment and drive it up and/or help the truck with it?
I probably could have removed the bobcat and mini trackhoe. That would be 9000 lbs between them. That would have put me at a weight I could have kept going 1 to 2 gears taller.
But as mentioned, you can have all the HP/torque in the motor you want, but if it can not get to the ground in a practical manner, you're screwed! I've always had better luck towing with a properly setup drivetrain in a lower HP rig like this Navistar, than a higher power, but improper, usually transmission setup rig.
Marty
