Final assembly completed July 26, 2007. This page does not cover a thorough, step by step assembly but the basic highlights. The QuadraTrac case is from a 75 Wagoneer that had 118,000 miles on it and drove good before we stripped the Waggy. The case halves had all the seals and shaft assemblies removed so they could be power washed at the car wash.

MileMarker Conversion and Seal Kit

Below you see the two halves just about ready to go together. On the left, the front half of the case got a new output shaft seal, new pair of tranny tail shaft seals and front shaft assembly installed. An ounce or two of ATF was liberally spread around the bearing surfaces, chain and sprocket teeth before the sprockets and chain were slid into place. On the right, the rear half gets all new shaft, shift collar and thrust washer from the MileMarker kit. Grease is applied to both thrust washers to hold them in place during assembly.

Note: The Quadratrac emblem was laid there just for fun and did not stay inside. =8-)

Closer look at the replacement to the stock differential.

Closer look at the rear half of case showing new shaft, shifter and thrust washer on left and main drive sprocket thrust washer on the right. The new case Oring is in the groove as well.

Applying a layer of RTV on the Oring seal. This was spread thinner by finger along both sides of the seal groove to prevent excess from getting inside.

Below the case halves joined together making sure dowel pins line up properly and case bolts are torqued to 20 foot pounds. Do not over tightened these! Also in this picture is the power take off assembly that connects the QuadraTrac to the tranny tail shaft when Low Range is not installed.

Power take off installation.

The collar locks the power take off to the main drive sprocket. Seating the C-clip is a bit tricky unless you invest in a good pair of C-clip Pliers. Once the C-clip is spread far enough, the collar fits all the way down agains the main drive sprocket.

Janie and Bill will remove this assembly to install a Low Range unit. These parts are handy to carry on the trail just in case of Low Range failure. It does not take long to replace the Low Range with the power take off assembly and cover.

Next is the Edrive shifter. In the case of MileMarker conversion, this becomes the 2wd/4wd shifter. Orient the QuadraTrac so the detent ball bearing will not fall inside the case during assembly. Put some grease on the nylon fork caps, stick them on the fork ends and slide the fork into the shift collar groove below. The fork can go in two different ways. Only one way is correct. The longer end of the shaft hole on the fork should be towards the back of the case. Next drop the spring in and gently drop the detent ball bearing in on top. I always use some grease on the vacuum shifter shaft and collar so it is not dry. Hold the detent ball and spring down with a small screw driver and slide the shaft in through the shift fork and over the detent ball. Now put in the retainer spring so the shifter collar does not slide back out. Now you can work the shaft so the two c-clips can be installed on either side of the shift fork. I used a small piece of vacuum line to suck and blow on the shifter tubes to be sure the shift fork moves back and forth freely. Put the new seal in the groove and you are ready to put the inspection cover on.

Edrive indicator installed along with inspection cover. The yoke nuts have been torqued to 120 foot pounds and power take off cover torqued to 15 foot pounds. This puppy is ready for a ride to Prosper, Texas!