1992 Dodge D150 2x4 Automatic 318ci/5.2L V8 Truck drives okay, but shifts hard from 1st-2nd-3rd. (Overdrive does NOT engage, but has worked in the past, since shifting issues started) Also, slowing from cruising speed of 65 mph, transmission will not down-shift until about 10 to 15 mph. At this point, vehicle shudders like a standard type transmission would do. I have heard multiple solutions from torque converter to 'tuning' transmission to solenoids. What do you think I should do?

Has the fluid ever been flushed and a new tranny filter installed? do that first.

I have a 92 Crown Vic first and second works fine reverse works fine when it shifts in the third gear it goes to slipping and overdraft can you help me fix this problem thank you

http://techauto.awardspace.com/transmission.html
this covers the symptoms and the repairs. to me it sounds like it could be the tcu. maybe a blown capacitor. hope this helps. and goodluck.

it may be a bad transmission modulator valve located on the side of your transmission,vacum operated. a sudden downshift or forward shift when unexpected is sign of a bad modulator valve or a vacum leak to the transmission.best to shop around for a garage w/references when it comes to transmission work though. check all the vacum lines to your transmision,you need to look on the underneath side of your truck on the side of transmission for a loose or disconnected vacum line on the side of the transmission. when you feel the vacum line,follow it to the top of engine,the vacum line is about 3/8th line,and may be disconnected or losing air. to make this short,when you drive the car,start out in low gear and shift the transmission,manually from 1st to 2nd to 3rd does it do right with no slipping? if it does this right and shifts great manually,the modulator valve on the side of the transmissions bad,or a bad vacum leak in-between.thank you for choosing fixya.com

sounds like 3rd gear clutch is out (it might have blew out a lip seal or something)
pull the pan c if there is a lot of black on the bottom of pan (no 3rd = no 4th either) the 3rd gear clutches are engaged along with the 4th gear clutches to make overdrive
if the tcc cable is out of adjustment it mite shift at wot (wide open throttle) max rpm (5000-5500)
if it just 1,2, neutral its probly clutches

Dont think they changed it yet but the older chrysler units had a rod that went from the throttle linkage to the transmission (maybe a cable now)...If you lengthen the rod it will increase shift pressure and give you an earlier shift.

you need a governer pressure sensor soleniod. sorry you canceled the chat. but put this in. these have to match on scanner reading

need more info i had a 1984 chevy half ton and first, second, and third worked fine but lock up didnt work. the problem was there was no vacum at a switch under the hood on the fire wall also your shift linkage could be out of adjustment. try driving down the road and raise up a little on the shifter.