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Discussion: A Diesel Truck Question

Posted Discussion
March 12, 2012
surf88
Men's 60
873 posts
A Diesel Truck Question
I realize this is out of the ordinary but if there are any mechanics out there, I need some input. I own a Ford Diesel F-250 Super Duty. Getting ready to drive to Phoenix for a tournament. Today, I noticed the automatic transmission was not shifting smoothly into drive or reverse but was jerking (not slamming real hard though). On the dashboard digital read out said check transmission temperature. Truck has only 71K miles.

If this reminds you of a specific issue, please post a response. I'd like to figure this one out before we head south to Arizona.
Thanks,
Ed Andrews
970-729-3145
March 12, 2012
taits
Men's 65
4364 posts
Ed, have a Duramax but should be about same. Do\did you ck fluid regularly and\or have you changed it at 60k?
You might check diesel trucks .com also they have a good forum.
March 12, 2012
crusher
Men's 70
389 posts
Ed, sounds like your Throttle Positioning Sensor is on the blink. Causes engine to wind up and then shift into gear with a lurch.
March 13, 2012
surf88
Men's 60
873 posts
crusher: that was not the symptom. Drove home, attempted to back up and turn truck around. Shifted and did not quickly or smoothly engage but engine rpm did not rev up.

transmission fluid does not look like it registers on the dip stick as obvious as it does when observing oil dipstick.
March 13, 2012
Kalkrush
12 posts
If you show no fluid on stick you need fluid and you have a leak. Trans should be service every 2 years or 30k miles.Get it service or drive another vehicle to
AZ.
March 13, 2012
taits
Men's 65
4364 posts
Ed,
To check Trans fluid you need to have it warm and turned on. Not showing on dip stick, is not a good sign anyway.
Oil, you check when off and warm.
March 13, 2012
taits
Men's 65
4364 posts
Ed,
To check Trans fluid you need to have it warm and turned on. Not showing on dip stick, is not a good sign anyway.
Oil, you check when off and warm.
March 13, 2012
dano911sc
47 posts
Surf88,
After making sure tranny has fluid you should be more concerned about digital read out " transmission temperture " is the tranny overheating (this is usually accompanied by a strong burned odor to the fluid).
. Fluid cooler lines cloged - drain and refill tranny, if this doesn't cure the problem, have cooler lines cleared or replaced.

. Faulty oil pump,internal slippage - have transmission checked professionally.

Also heavy pulling or hauling with insufficient cooling - install a transmission oil cooler.

The vibration faulty oil pump, valve body malfunction, faulty torque converter or engine needs tune-up.
March 14, 2012
surf88
Men's 60
873 posts
Thanks to all for your input. Learned the Ford transmissions use a specific fluid formula and there is a patent on it. Was 1 quart low and found no leaks in the tranny. Hope it will work but do plan to have it serviced when I get home. Playing ball in Phoenix this week. Weather is great here.
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