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2005 48RE won't shift into 3rd

8.1K views 3 replies 3 participants last post by  texascummins13  
#1 ·
My Dad's truck, bone stock with 83K on it, occasional towing 5K or less, but has towed 10K rarely.

Mostly, he just drives it around empty, and most of that is highway miles.

Symptoms:
Last week we noticed it didn't want to shift into 3rd gear. It would run all the way up to red line, and occasionally shift up to third if he backed out of it, sometimes, shifting back down to second, sometimes continuing on into upper gears.

I have read the threads here, and think I have all the bases covered as to what we can do to fix what's wrong without pulling the transmission, but just in case I missed something I wanted to run it by you guys to see what you think.

We checked every fuse and relay identified on the power center cover as being for the transmission, even swapped some of them around where we could find a "like match" in non critical equipment.
We then replaced the fluid, filter, tightened the bands per spec. When we dropped the pan, the fluid smelled burned, and the magnet was "Fuzzy" but nothing metal... I expected there to be more, but there wasn't. Kind of looked normal for a truck with 80K+ on it.
Test driving it we had the same problem. Today we replaced the Governor solenoid and Gov. Pressure switch, the problem persists.

Any ideas?

Thanks in advance!
 
#2 ·
Im having what seems to be the same problem with my 06 it just randomly started last night have yall found the problem or are yall still looking?
 
#3 ·
im havin that prob too but myne runs to redline in 1st then meshes into 2nd. wont go to third unless you revv it up then let off completly. Im scared to drie because it gets kickdown happy and will bring the engine up to like 3500 rpm when it drops down. last thing i need is that happening on the highway.
 
#4 ·
Lifted thats what mine is doin as far as the 3 gear i drove it around got it to 3 then o/d and it dropped down to 3 im supposed to be goin to waco from fort wort tomorrow thats not lookin like thats gunna happed with it droppin to 3 from o/d if anyone else has any input that would be greatly appreciated!