Installation 

Taking the old transmission out wasn’t hard but did take some patience and a few indispensable tools. There wasn’t a lift available so we used the handy man jack, raised the truck’s front end and put it on jack stands. Using a transmission jack we were able to lower the stock transmission easily. The tranny wouldn’t come out from under the truck while on the jack so we had to raise the transmission by hand and slide the jack out from underneath. Sliding the transmission was just as easy as we placed a piece of cardboard underneath for ease and protection. Sometimes a low-tech solution is exactly what you need! 

After getting the old transmission off, the flex plate and bell housing adapter needed a good deep cleaning. 

Following the same steps as taking the stock transmission out we knew we couldn’t fit the transmission back underneath while on the jack. We carefully placed the new trans on the cardboard and slid it under the truck. We all got into position (as best as possible considering the cramped quarters) and raised the transmission onto the jack. Once in place, we put a tie down around it to keep it stable while we got it into position. From there, we moved the jack into place and lifted the 4R100 up into the waiting cavity and aligned it, bolted it in place, and set the cross braces.