Hey guys. I have just installed a a rebuilt 4L65e and a 3k stall into my Crewman and on some hyway testing I have found the following. The converter locks in great at 85kph (53mph) but after about 5mins on the hyway it seems to unlock and go back to 3rd. Temps are all good 95c max,
No DTCs have been logged, but we can overide and command 4th with efi live.It is hard to work out wether the stall is unlockin 1st or we are loosing the signal and droping to 3rd which would unlock the converter as it happens at the same time. Once lost you can not get it back to 4th, tried playing with the shifter, adjusting speed of car, stopping and restarting car.
The funny thing is that while limping home we found 4th again(as in it just started working again) so about 5mins of 4th followed by aprox 5mins of 3rd and so on. We have talked to the box builder (well known) but is over a1000 km away and he says that it cant be the box.
So anybody out there got any ideas.
Cheers Ian