Combines Tattletale II to Tattletail III

TT2, TT3, and TT4, monitor different functions. The tach module is the only one that displays speed and fuel in your tank. I have several digital tachometers and Tattletale monitors for sale at very attractive prices. Email if interested. Tom in MN

Tom: Will the TT3 tach module change out with the dial in the TT2IJ Or are the sensors and everything differentIJ I may be interested depending on the complexity of the job. let me know... Thanks ND l2

All of the modules we have will fit any combine built after 78 for sure and possibly some before that without any modification. All you have to do is remove 4 screws, unplug the old one, and plug in the new one and you are in business. I know there was a change in monitors somewhere back in 76 or 77 but I dont remember exactly when it was. Knowing the serial number of your machine would help. I am also concerned by your reference to the TTIII as a tach module. I have always thought they were completely different. Part numbers would help identify what you have.