Originally Posted by Gunnar
Some of the canned tunes are not transmission friendly. Some add a bunch of power to the engine but don't do much with the transmission. Although I guess if you aren't going to be using the highest level of tune things may be ok. I don't know this from experience, just from reading I have done and mostly concerning Ford.
I guess it's just something to be aware of when choosing a tuner.
I had an Edge on my 03 for a short period but removed it after reading some of the tranny horror stories. It sure woke up the truck though.
I agree, the transmission is usually the weak link in this situation. Added horsepower/torque can kill a stock transmission real fast. Especially, If you are not smart using it. Use it in small portions.
On my Ram I have the Smarty Jr. A basic tuner with 40/70/100 hp options and some options for Timing and torque management. I use the 40 (Economy) mode around town and the 70 (Towing) when towing. I always keep the torque management on "stock". And easy on the acceleration. I have been using mine this way for about 3 years.
Not much you can do to stock transmissions to deal with HP increases. Some tuners can increase line pressure to keep more pressure on the clutches etc. to prevent slipping. You can also install a shift kit, valve body, etc. But, if you want/use big HP, tow a lot with heavy loads, lead foot, performance truck, then you will need to upgrade your transmission (valve body, clutches, input/output shafts, etc etc).
But, in the end...as long as you understand what you are doing and do not abuse the added "modest" gains....IMHO, you will be ok using a tuner.