Hello, just wondering what the limits would be for a 4 cyl/ Automatic trans TJ on terms of tire sizes. I have heard that 225/75/15 is the largest you can go before you would have to change shift points in the trans. Is this true, and is it really expensive and/or difficult to change the points? Also, as far as performance products, what is really available for the four popper in as far as plug wires, caps and rotors, and ignition units? Are they really worth the money?

                      Thanks in advance! -Rick Rinaldo

I can't tell you too much about your tranny,  however I have a 97 tj with the 2.5 and a 5speed  i ran 33/12.50s  but had to add a k&n intake and a free flow exhaust just to see 75 on the high way I've read about guys putting banks superchargers on the four but haven't seen it yet.  good luck