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You cant gross 15 - 26K with a 5-speed no matter what you put in it....mine broke twice not pulling a trailer! I used to Hot Shot for a living with the other truck with the 5-speed and anyone who pulls a trailer professionally will tell you that 5 speeds are junk. The transmission is under rated for the truck & the Cummins and by the time you spend all of the money and time on trying to upgrade a 5-speed, you could have had a 6 new speed transmission & new front driveshaft for about $2500.00 and not sink money into a black hole of a transmission.



That may be true in some cases buy the fact is there are fixes that work. Granted new and improved transmissions should be better. The main problem is mis-conception. Putting a fix on something that should be replaced. In a nutshell if you had the hack fixes you should of had a new mainshaft. That does not mean the rest is junk. I owned and ran a dealership and I know what came into our shop and the 4500 failures were almost non-exhistant. Point here is the poster needs advice and all advice is good once you sort through the myths.