Quote:

Nacho..
In looking @ changing out the power transistor I find no mention of using the insulating thermal grease...
Thermal grease is absolutely required for bonding the power transistor properly to the insulator to its heat sink mounting. Without this the power transistor can heat up, burn out and fail. As it is not using the heat sink to help cool it down..

Here is a link to a YouTube video for the proper procedure.
https://www.youtube.com/watch?v=hNRacVQRgBc

Just my $0.03...



well Actually I didn't do it because originally didn't have anykind of thermal compound on it, aaaaand it was first a test with an incorrect transistor ( just close ) and cheap... I haven't tried yet to install the 1978 original Motorola Transistor I found from germany since my car has being parked for a REALLY DEEP body job by a year and couple of months now. Will take later about that.

I have the thermal compound handy because quite often I dissasembly my PC to clean up everything and apply a new thermal compund layer over the CPU to attach the heat sink and fan assembly

With a Charger born in Chrysler assembly plant in Valencia, Venezuela