Dodge 47rh tranny swap

Dodge Conversion. This is how to replace your three speed transmission with a back A overdrive transmission with a three wire connector gas. Remember overdrive is only 3rd gear high range anyway. There are two wire transmissions out there, these have a non-lock-up torque converter. With this three wire setup you have a four speed transmission plus a torque converter lock-up feature. The extra gear is 3rd high range.

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Here are some notes worth mentioning regarding the swap to a lockup - 47RH trans on the early - non lockup but over drive CTD 12 valve trucks that came with the 46RH OD automatic. So the trans you need for your 1st Gen Dodge 12 valve truck was only produced in the early 2nd gen trucks build from to end of 12 valve production dates. The lockup is controlled by a single grounding wire in the same way the OD ground wire causes the 46RH to go into overdrive. In the way the factory wired this on the 92 - 93 trucks the ground wire goes to the single board computer so it can be controlled by truck speed, throttle position sensor and over ridden by the over temp oil switch or the OD off switch on the dash. On my 75 truck I leave the OD lockup ground operated as Dodge did in the - trucks, but for torque converter lockup I installed a simple switch right on my steering column so I can just hit the switch when I want lock up.