So I installed an external oil filter and a second oil cooler. Replaced the internal filter and refilled it. I put 2 1/2 gallons of trans fluid and it worked fine for the hour I tried it out. Went to move the truck because it needs more work done and the dipstick reads empty. No leaks on my fittings, oil pan is clean. Oil drain plug is clean and there’s no puddle under the truck either. Is this normal???

 

10 quarts. I think capacity is 12 to 16.... or some such. Add a quart, see if it shows on the stick.

 

wow I had no idea capacity was that high. Guess I’ll go get more fluid and see.

 

With the modifications you added (remote filter + lines, large transmission cooler), it added the need for additional transmission fluid, too.

 

yeah I thought stock was 5 quarts so I thought 2 1/2 gallons was more then enough

 

Four quarts plus for just a filter change. The slushbox holds a LOT of fluid.

 

this transmission makes me so mad sometimes

 

It's basically an evolved Chrysler 727 transmission with an overdrive unit added to the back, a modified valve body, along with electrical controls that are controlled by the PCM. What's not to love?

 

clutches going out because they can’t handle the torque from the engine they were designed for

 

There are ways to deal with that issue. Add 48RE drums to it, which hold more clutches. In addition, add Reybestos JPZ clutches for greater holding power. If you add additional horsepower, the transmission will need to be beefed up to handle the power. Folks are building/beefing up 48RE transmissions to go behind high horsepower/torque modified diesel engines and they are holding up well to my knowledge.