I HAVE A QUESTION? I KNOW THE CAT 3126 IS NOT ALL THAT GREAT, AND REPLACEMENT COST IS PRETTY HIGH, BUT I WAS WANDERING IF I HAVE A CAT 3126 6 SPEED EATON, AND IF/WHEN THE ENGINE GOES, COULD I REPLACE IT WITH A DIFFERENT MOTER THAT WILL MATCH THE TRANS? AND IF YES, WHAT KIND AND WHAT WOULD IT...