Attention: TDR Forum Junkies 
Cruising around today, doing about 75MPH, then let off the throttle while coasting down a hill... part way down the hill, my transmission locks up (as in chirps the rear tires 
), then drops to 3rd gear, no TC lockup, and been there ever since. I was 20 miles from nowhere, so I had to limp it to the nearest town.
So far, here is what I found:
Truck feels like it's dragging when taking off. . like it's in 2 gears
transmission is full of fluid, fluid is clean and smells ok.
Got a code P0753 -- 3 / 4 shift solenoid / Relay circuit
Truck currently has NO O/D or TCC lockup
Can press O/D off button, but no RPM change, no lockup. 3000 RPMs @ 60MPH
So, where is the 3/4 shift relay? Solenoid? Could this cause it to hang in two gears at once? I need help guys... I'm stuck.
), then drops to 3rd gear, no TC lockup, and been there ever since. I was 20 miles from nowhere, so I had to limp it to the nearest town. So far, here is what I found:
Truck feels like it's dragging when taking off. . like it's in 2 gears
transmission is full of fluid, fluid is clean and smells ok.
Got a code P0753 -- 3 / 4 shift solenoid / Relay circuit
Truck currently has NO O/D or TCC lockup
Can press O/D off button, but no RPM change, no lockup. 3000 RPMs @ 60MPH
So, where is the 3/4 shift relay? Solenoid? Could this cause it to hang in two gears at once? I need help guys... I'm stuck.
. Several phone calls and $110 later, I'm back in business. I'd like to thank Inarush76(James) for his wisdom and extreme patience in the matter! The phone tag game is starting to get fun 
Sorry about all that 
I'd also like to thank Jim Fulmer for the referral!
