Hi ,Not had chance to get on with the Munga , been trying to find the problem on my Grand Cherokee , Auto slipping in third and 4th something electrical , real head banging stuff replaced speed sensor , govener pressure transducer , pressure solenoid , adjusted internal brake bands , checked throtle potentiometer which I think is ok have no data to cross reference , must be a bad signal coming from a sensor and the transmision control module releasing gear engagement pressure ,
going to have to get it hooked up to a compatible computer to see whats going on , everything OK apart from that :-)