42RH in 68 Dart advice/request

Front half of the trans is similar to 904. Back half is where you will need the special tools. Grab a fsm for 92 up truck and look at it. DO NOT ATTEMPT TO REMOVE SPRING, IN THE IVERDRIVE UNIT, WITHOUT SPECIAL TOOLS. IT IS UNDER 800 PLUS LBS OF TENSION. YOU COULD HURT YOURSELF. If the overdrive clutches are burnt up, the od unit WILL HAVE TO CIME APART. As said above, there are upgrades that can be incorporated into the rebuild. Also, there are rebuild od units on internet fairly reasonable.