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Automatic Better Economy Than Manual
Some of the newer automatic lock up on every gear to improve mileage rather than just overdrive. The computer shifts to provide optimum emissions. Some models are available only as autos in CA.
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Automatic Better Economy Than Manual
I agree there are a few that have EPA ratings higher with the auto than the stick. This may partly be the optimization of the auto to the model vs the off the self manual. I must admit when I spent the weekend looking recently, for my sister's small SUV or 5 door I did not find one higher with the auto. Naturally these were not high end machines, but we did cover Honda, Toyota, Mazda, Ford and Chrysler.
For towing the manual is better primarily for the braking effect. I agree with Ken the number for the auto are not necessarily real.
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Automatic Better Economy Than Manual
Randy;
Makes you wonder what we have in the army today, when they pulled the boys out of the field and trained them to drive deuce and a half 55 year ago.
I have a friend who was in the Red Ball and my uncle was driving on the Canadian front through Italy, France, Netherlands and Germany. Are we getting too soft?
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Automatic Better Economy Than Manual
I guess from my prospective the two fingered computer mentality really dumbs down the populous.
I had one young man with an honours degree in chemistry to whom righty tighty lefty loosy was a new concept. I paid him like MacDonalds for two years while I trained him. He was worth the time, but had be raised by his mother and been allowed to play computer games and not much else. He understood his limitations, some don't and I guess they make them officers now?
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Automatic Better Economy Than Manual
And what temperature your transmission cooler when you reach the top? With the manual and the Cummins I travelled the passes out of California (north to Vancouver and east to AL) with 4000lb load in the back. I was in 5th gear both up and down the passes and never touched the brakes.
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Automatic Better Economy Than Manual
Maybe we should leave this to Randy as he certainly has more experience with these couplings. Certainly when using air as the working fluid.
If the transmission is not locked it is a viscous coupling. The impellor of one side pushing against the other. Work is being done on the liquid and it heats. The work will also be placed on the fluid when in 2nd comming down the hill.
Degradation generally doubles for each 10 degree C (18 F)increase in temperature. Therefore for example you come up the hill and the temperature increases from 120 F to 220 F the fluid degrades at 5 X its normal working rate.
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Automatic Better Economy Than Manual
K - I grew up in the mountains of B.C. and only saw one truck with an automatic, a Hayes HDX. Equipping a truck for flat land and in hilly of mountainous terrain are two different things entirely. Freightliner trucks were built specifically because none of the flat landers could create trucks for the West. I had a friend that worked for Jacobs; 10 year ago over Jacob’s history more than 80% of their sales had been in B.C.
A truck equipped for transporting gravel or grain on the prairies can not cut it in the mountains. Some one purchased a late model Ford gravel truck from the prairies with a gas engine and brought it to Gibsons thinking he was going to make a buck. It sat for years with a for sale sign on it on the highway.
The transmission in the HDX, an off road truck, was not exactly an automatic but automatic clutch. I don't know of any road trucks with a V16 Diesel. I believe it locked up in each gear. The operator had to shift gears but with no clutch.
Maybe Randy knows more about these transmissions. I have never driven an auto large truck, only stick and only been near the HDX. I have driven large rubber tired loaders, but they HST not automatics.
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