Hello, I have an automatic, 130,000km 2012 Volvo XC60 that I recently changed the engine from a B4204T7 to a B4204T11, complete with a replacement transmission as well. The vehicle is however not shifting as it should, having the transmission stop working while enroute. The vehicle behaves normally however after it rests for a short period, everything is back to normal. It is important to note that we had to switch up the driving shaft, as it was not the same size and did not use the ECU for the new engine as it did not quite fit, opting to go with the old one. There is an array of lights, where the city safety, service light, bulb replacement, ABS/DSTC, headlight adjustment (one of my headlights is short, water got in, but the full beam is working) and washer fluid warning lights as well. The engine is running somewhat rough, but not like it is a misfire. Whenever the vehicle works, it works really well, it is smooth, only that you cannot jam your foot on the accelerator because the transmission issue will pop up, what could the actual issue be?
Well you found out why I advise people never to change engines or transmissions with different ones. Modern cars have too many sensors computers, wiring for anything to mash up correctly. Now if you're near Portsmouth Rhode Island, I check them out free. I've got some fancy equipment that I could go through and try to see if perhaps a wire or sensor was damaged during the replacement, but from my experience you can never swap out something as important as the engine with one that isn't exactly the same or you're going to have problems
Scotty, thank you so much.
Trust, if I could bring my vehicle to you, I would.
I'm unfortunately in Thika, Kenya. Unless you have some contacts here?
I'll see if I can get someone who does wiring and hope that they can at least rule out a damaged wire and such.
Thank you regardless.