Transmission in my 91dodge ram 150 startes to slip

Usually approaching time for a rebuild, HOWEVER try Lubeguard Red additive. I have seen it work on slipping trannies, often recommended by Oems and shops. Usually available at NAPA stores. Dont buy others or even another Lubeguard unless its in a red bottle.

Once a transmission slips-- it is done

Time for a rebuild

THERE IS NO OTHER SOLUTION

It slips,it has done that for awhile,that is an
internally worn out trans

1986-- I would get rid of it

You never install a used trans & $2,500 for a reman
or rebuild, makes no sense.

The whine is a worn out pump or stuck pump valves

get a new starter, a sign of sticking solenoid is having to tap it to release bendix spring

Those are known for transmission problems. I would change the fluid and filter in the transmission. Also I would put 2 quarts of Lucas Transmission Treatment in it and if its not too late that should make it last a little longer, I am sure it will eventually start slipping worse and then start slipping in all gears but with Lucas you might get another couple years out of it depending on how hard you are on it. Sorry its not better news but I am a mechanic and I work on 6-8 dodge trucks a month and 1 or 2 will be showing sighns that the transmission is slipping. One way to tell if it is slipping is to pull the trans dipstick when its warm and you have driven a few miles and see if there are a lot of air bubbles on it. If there are, its slipping.

Hi, transmission slipping normally does not occur when the transmission is warm, as warm temperatures favor proper working of the automatic transmission systems. Nonetheless, if problems such as, broken transmission bands, gears or torque conversion already exist, then the transmission might slip even in warm temperatures. Another situation may arise, if the fluid suffers from contraction in cold weather and gradually the weather warms up sufficiently, to expand the internal parts and fluids. Then due to cold weather, a small transmission problem might occur. However, the problem may be too small to affect the vehicle. However, warm weather cannot be directly linked to transmission slipping.

Remove trans valve body and clean

When it is cold, it gets tight and hangs in first gear
You can't have any sediment in the valve bores

Also after you clean it,use the correct fluid and a bottle
of LubeGard, from International Lubricants,not Lucas products

Have you replaced the transmission filter and fluid yet,
if your transmission works ok until it heats up,your transmission external cooler may be plugging up getting the transmission fluid to hot and not cooling it at all.It is located in front of your A/C and radiator.you can replace it with an after market one or have it flushed.
and you might want to put in an additive for the transmission made my Lucas.

CHECK TRANSMISSION FLUID LEVEL.IF ALL IS GOOD.EITHER FILTER STOPPED UP.OR TORQUE CONVERTER NOT LOCKING UP ITS SLIPPING.SCAN IT TO SEE IF TCC SOLENOID AND SHIFT VALVES IS WORKING.

hi..
your transmission has failed or the transmission digital range selector switch is bad, have a scanner put on the system and see if any trouble codes are present...

thank u
rate me!!

Sorry this is not an easy fix the clutch packs in the transmission are slipping, usually caused by wear, but the hydraulic pump is probably getting week. As the oil warms up the oil gets thinner and the hydraulic pressure decreases. Times for a overhaul of the transmission, and if the torque converter can not be flushed a new torque converter is recommended. You may get lucky buy changing the fluid several times, but if the transmission is 22 years old it may not help.