Ive got a 1998 Ram 1500 5.2 2wd 46RE. For the past month, the truck has had a weird shifting issue. On point and at exactly every time, when the truck reaches the 3-4 upshift mark, the rpms jump about 400 or so rpm for a second or 2. If im going uphill, that will sometimes stay like that until i let off. It also seems like the overdrive doesnt work, since rpms are higher. Also theres no rpm change with o/d off. Important thing to note, when O/D is off, where the rpm normally jumps, it goes down a few hundred in rpm, like it did before the issuer.

What I think is happening, is the TC locks and then unlocks, based on live data scans.

Im beyond lost on a solution though. Ive replaced...
Throttle Position Sensor
TCC and O/D solenoid
New brake lamp switch
New 3-4 shift spring (Previous one was fine)
Trans speed sensor is a few months old
Gov pressure sensor and soleniod are new from a previous repair
Fluid is brand new
Connections are clean
NO CODES

Any insight from anyone? Id really like to try and fix this without going to a shop.
Thanks

 

have you adjusted the TV cable? Bands??

 

Throttle cable yes, bands no. A few months ago I attempted to adjust the inside band, but the nut was really tight so I kinda just left it alone.
That being said, what does each band operate? Ie: the adjustment screw on the outside then the inside.

 

One of them is the manual first gear band, (and it probably does something else as well, I just can't remember right now.) the other one I believe is for reverse. So theoretically, I don't think either of them are doing anything when you are going forward, with the trans in Drive..... but, transmissions aren't my strong suit.....

O/D won't engage until you are going faster than around 42 mph..... Take it out somewhere you can drive at a steady 50mph, and sample the O/D off button, when you press it, a lite should come on in the cluster, and RPM should jump quite a bit. (4-500 rpm at least)

 

Thanks for the information! I’ll definitely test that tomorrow morning and I’ll get back to you.

 

alr, on my way to work this morning, it did seem like overdrive did work. Usually with overdrive off, around 45 mph I’m at 2k rpm, and when I had it on, I was down below 1500. So the od is working. It just seems like the first few gears shift higher than usual. Like I wanna say (during a steady speed increase) the first point is about 2100 and the 2nd is about 2400 or so, so it’s definitely wonky around there.

either way, I’ve done everything in my power with trying to figure this out. I’ve been going at it for a month so today I’m gonna head to a shop and get an estimate on a diagnosis, and a torque converter estimate. Can’t say for certain what it is but it’s gotta be something in the shaft part of the transmission or something electrical that I can’t figure out.

 

Shift pattern should be 1-2, 2-3, TCC, O/D. You should be able to hear/feel each shift. (gotta pay attention though. ) Shift points are determined by the TV cable, if you think it is shifting too late, loosen the cable one notch. See what it does.

 

Got it, I definitely will do. I think the day after the issue started i took some slack out of the cable so I guess that could explain the shifts.

 

Hi, I just wanted to update you on this issue. Brought the truck to a shop and it turns out the governor pressure was really low. Was at 72 when it should have been at 126. So I ordered an OEM mopar governor pressure sensor and solenoid and will install that when it comes. I had installed a Amazon aftermarket solenoid and sensor so it very possible those could have gone bad. If those don’t work, then it’s also very possible there’s a blockage in the valve body.

I was thinking too, this would also explain the high shift points, since it seems like the trans is trying to make more pressure to shift so it ups the shift point,