My 2002 F250 with a 7.3 has an issue. pulling my camper the turbo wont pull hardly at all.When i get to a hill it will downshift before the turbo does any thing..when I don't have the camper on it will pull but stop at like 60 mph like you hit a switch. This is a change from wheni pulled my camper to Georgia in october it pulled good but the check engine light came on there were no codes when i checked them the next day.
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If you drive with cruise control a lot then it makes a huge difference in fuel economy. The car will downshift into a much lower gear on hills than is necessary. This raises the engine RPM,s and reduces fuel mileage. If you keep it in manual downshift only if the car starts slowing down too much, but usually it will pull most hills at like 2500 rpm and will not require downshifting. Other than that if you want to go fast it allows you to wind up each gear more than if in Auto.
Most modern automatic transmissions have a chip in them that will prevent the car from downshifting, say, into first gear when you're moving at 60 mph. Still, I wouldn't try it. When climbing a hill, only downshift if the AT can't decide which gear to be in and switches back and forth--choose the lower one. When descending use brakes to decelerate. However, once you've braked, do use a low gear to coast in, to prevent you from freely accelerating down the hill. ------------------------------------------------------------------------------ GM Tech2 GM Diagnostic Scanner With C card
Pull your transmission dip stick smell the fluid,if it smells nasty and burnt,have your transmission serviced.
The tool for all automatic transmissions is CLEAN TRANSMISSION FLUID!
SOLENOID ARE NOT ACTIVATING WHEN THEY SHOULD CHECK THE COLOR OF THE TRANSMISSION OIL IF ITS DARK BROWN AND SMELLS BURNT THEN YOU HAVE A WORNED OUT CLUTCHES
Hi, two possible issues here. the first could be a malfunctioning shift solenoid. this can affect the shifting operation. the next issue could be the transmission control model(TCM). if this fails, you will experience abnormal shifting during up and downshifting. I would check these areas as well as the fluid level as well. Some transmissions are sealed and you cant check the fluid level. if you have a transmission dip stick visible, please check the fluid level before you check the other areas.
You may want to check engine performance. If you have any problem with either the fuel (including filter) or ignition system (including timing chain) the transmission will react to the subsequent lack of power, in order to maximize remaining power... This includes early downshifts. good luck
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