Can my truck tow this?

Terryallan wrote:

What you are ignoring. Is the fact that with a lower gears the tow rating are increased. So what may be pushing the limits for a truck with a 3.15 rear, is well with in the limits of a truck with a 3.73 rear. The truck is rated on how it is equipped. Higher gears equals lower tow rating. Lower gears equal higher tow rating. It is simple physics. Lower gears deliver more power to the ground at lower speeds, and most important of all. From a stop. You only got one low gear / starting gear to choose from. and there is a HUGE difference in a 3.15, and a 3.73. Your TV will let you feel the difference by raising up on one side when you start off, if your gear is too high. Upper gears / 4th 5th 6th, mean nothing if first gear can't get you started.

No, I'm not ignoring it. If you are trying to tow a 9k trailer with an 8k rated truck...dropping the rear end to a lower gear to get 10k rating does change things (mostly limited to hard mountain runs...not so much on sea level flat land). But no one ever suggested it was a good idea to tow over the trucks limits and expect good performance towing...the presumption is always that both trucks are within ratings and everything except the rear end is identical.

Yes, gear ratios make a difference...with 10speed transmissions though, you can pick the ratio you want to get the performance you want...it's overall gear ratios that matter for performance and for most practical purposes, they will be the same.

As far as 0-60 acceleration...generally, most RVers don't do jack rabbit starts but....

If you look at the new 10 speed transmissions, 1st gear is far deeper than the old 4 speed transmissions. Example: 1990 Ford 1st gear was 2.84:1. 2019 1st gear 4.69:1...that will negate the issue you describe with needing more torque to start a truck while towing.