I would like to get some imput on the pros and cons of transmissions. I have had the TLC 3 speed before and had no problems with it. I upgraded to the TLC 4 speed with the intentions of getting a higher gear for the highway but I didn't research it enough to find out that what you get is a lower 1st gear and the same top gear. Is the 4 speed really any better than the 3 speed. I know that the 3 speed has 10 splines verses the 16 spline of the 4 speed and that they say the transfer cases are quieter on the 4 speed but they both sound the same to me. Is there any great benifits with going with a 350 or 400 turbo automatic transmision besides not having to shift.  o automatics pose a greater heating problem. Any info would be great. Thank you. ???