How to Drive Uphill and downhill

I learned my hill lesson on The Big Hill on the way to Bella Coola, BC. I was driving a 3/4 ton GM van pulling a tent trailer down this enormous hill. I thought I knew what I was doing, downshifting to second gear and using the brakes briefly on each switchback. Luckily it was a hot day and my daughter had her window open. She smelled something "burning". I stopped and found the wheels were very hot. After a few minutes to cool down we proceeded in first gear. We stopped at the half way rest stop where we found a melted car with a sign warning what happens when brakes get too hot. We did the rest of the hill in low gear with very little use of the brakes. There was a delightful campsite at the bottom with several cold mountain streams. Ever since I have kept the brakes cool for stopping, not slowing down (except to downshift).

Pictures of The Big Hill: http://www.explorenorth.com/library/roads/bella_coola_hill.html

Pictures of the other hill going up to lakes above Bella Coola.
http://explorenorth.com/wordpress/experiencing-bit-bella-coola/
DW, DD and I turned around at a spot like the last photo after encountering 8 foot high snow. We were young and very careful - unhooking the trailer, turning it around by hand, then turning the van using rocks to block the wheels when necessary. The only alternative was to attempt backing down that hill.

pnichols wrote:

pianotuna wrote:
Phil,

Is there much extra fuel cost for running in Tow/Haul mode? (Mine is to old to have it.)

That's a good question ... and I don't have any quantitative data one way or the other.

In Tow/Haul mode - near the end of going up a hill and when getting up to speed after a stop - our Ford TorqShift transmission stays in each lower gear a bit longer before shifting into the next higher gear.

This means that the V10 will be spinning faster a bit longer ... which maybe means that a bit more fuel is consumed ... but it also could mean that, although spinning a bit faster, the load on the motor during each revolution may be a bit less while it is spinning faster so maybe more fuel is not consumed. :h

However, NOT being in Tow/Haul mode when perhaps one should be, could also mean that the transmission slippage in it's clutch is worse due to remaining in too high of a gear a bit too long. This extra clutch slippage wastes energy and increases heat in the transmission ... this waste translates into too much gas being consumed over what gas would have been used in Tow/Haul mode's less clutch slippage from remaining in lower gears longer/more.

The bottom line is ... I don't know about fuel mileage being up or down in Tow/Haul mode. What I do know is that when in Tow/Haul mode our Class C sure feels more responsive at all times and provides a more "in control" feeling all around. Of course when in Tow/Haul mode, our 5R110 five speed transmission still goes into fuel-saving overdrive when cruising - just like when not in Tow/Haul mode.

It's pretty hard to counter the argument that a motorhome, due to it's weight is at all times taxing the drive train just as much as a truck is whenever it's carrying a load or towing something - thus should be driven in Tow/Haul mode at all times. I sure wish Ford marketing/engineering would step up to the bar and flat out recommend this to all motorhome builders and their customers.

EXACTLY!!!!! Had to explain that to a neighbor of mine. MH is fully loaded 100 percent of the time drive it that way.

Charles

Surprised nobody mentioned having brake fluid flushed and changed every couple of years, it collects moisture which changes to steam in brake lines leading to "brake fade" or ineffective braking on long downgrades. Use lower gears with brakes as needed, when descending a long steep grade.

theoldwizard1 wrote:

ScottG wrote:

Gas engines use compression braking, not exhaust braking.
The difference is diesels hold the exhaust in the combustion chamber to create engine braking - hence the term exhaust brake. Gas engines do not hold the exhaust in. They simply work against the air that is drawn into the eng naturally.

True, but is about the same net affect,

Exactly!

ScottG wrote:

Gas engines use compression braking, not exhaust braking.
The difference is diesels hold the exhaust in the combustion chamber to create engine braking - hence the term exhaust brake. Gas engines do not hold the exhaust in. They simply work against the air that is drawn into the eng naturally.

True, but is about the same net affect,

pianotuna wrote:
Phil,

Is there much extra fuel cost for running in Tow/Haul mode? (Mine is to old to have it.)

That's a good question ... and I don't have any quantitative data one way or the other.

In Tow/Haul mode - near the end of going up a hill and when getting up to speed after a stop - our Ford TorqShift transmission stays in each lower gear a bit longer before shifting into the next higher gear.

This means that the V10 will be spinning faster a bit longer ... which maybe means that a bit more fuel is consumed ... but it also could mean that, although spinning a bit faster, the load on the motor during each revolution may be a bit less while it is spinning faster so maybe more fuel is not consumed. :h

However, NOT being in Tow/Haul mode when perhaps one should be, could also mean that the transmission slippage in it's clutch is worse due to remaining in too high of a gear a bit too long. This extra clutch slippage wastes energy and increases heat in the transmission ... this waste translates into too much gas being consumed over what gas would have been used in Tow/Haul mode's less clutch slippage from remaining in lower gears longer/more.

The bottom line is ... I don't know about fuel mileage being up or down in Tow/Haul mode. What I do know is that when in Tow/Haul mode our Class C sure feels more responsive at all times and provides a more "in control" feeling all around. Of course when in Tow/Haul mode, our 5R110 five speed transmission still goes into fuel-saving overdrive when cruising - just like when not in Tow/Haul mode.

It's pretty hard to counter the argument that a motorhome, due to it's weight is at all times taxing the drive train just as much as a truck is whenever it's carrying a load or towing something - thus should be driven in Tow/Haul mode at all times. I sure wish Ford marketing/engineering would step up to the bar and flat out recommend this to all motorhome builders and their customers.

janechucknicodemus wrote:
When I was a on the road driver, we had a saying,, never go down a hill any faster than you went up ..

That being said,, I have seen some idiots go up hill trying to and sometimes achieving burning up the engine./transmission. Way too fast and or going up the hill only to the burn out the brakes on the way down .. :S

5% grades 45 miles per, any more less speed. P And S Plain and simple.

I think that's good advice.
Way too many think you just keep it floorboarded up hills and many vehicles are basically idiot proof in that regard.

I'm able to climb hills at highway speeds comfortably but I slow to much lower speeds to come back down.

When I was a on the road driver, we had a saying,, never go down a hill any faster than you went up ..

That being said,, I have seen some idiots go up hill trying to and sometimes achieving burning up the engine./transmission. Way too fast and or going up the hill only to the burn out the brakes on the way down .. :S

5% grades 45 miles per, any more less speed. P And S Plain and simple.

theoldwizard1 wrote:

navegator wrote:

And your E-350 V-10 engine does not have an exhaust brake system none do, that option is not available.

All gasoline engines do exhaust braking. This is simple the "nature of thebeast". When your foot is off the the throttle, the engine get no air and this acts as a brake. Diesel engines typically do NOT have a throttle.

Downshifting an automatic transmission in a vehicle with a gasoline engine will cause the vehicle to slow down.

Gas engines use compression braking, not exhaust braking.
The difference is diesels hold the exhaust in the combustion chamber to create engine braking - hence the term exhaust brake. Gas engines do not hold the exhaust in. They simply work against the air that is drawn into the eng naturally.

navegator wrote:

And your E-350 V-10 engine does not have an exhaust brake system none do, that option is not available.

All gasoline engines do exhaust braking. This is simple the "nature of thebeast". When your foot is off the the throttle, the engine get no air and this acts as a brake. Diesel engines typically do NOT have a throttle.

Downshifting an automatic transmission in a vehicle with a gasoline engine will cause the vehicle to slow down.