Compression Ignition Addict
Join Date: Sep 2010
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Adding gear vs adding power...
Im to the point where im ready to tune my truck for a little bump in power or regear it to gain some highway towing power.
My highway speeds are 65-70mph TOPS, most roads here limit me to 60mph being my max. One good thing about DE i guess.
Anyway, with that in mind, 4.56 gears with stock 34" tires gives my truck a spot on match to the towboss 350's with the 4.30's and with my current 35's im still geared a little taller.
The reason im torn is adding power adds heat and extra strain on the engine and trans. Reliability is of utmost importance more than anything.
But based on how underwhelming the towing power is at the moment with the 3.73 gears when i get into hills pulling my car, i have to do something. if i was pulling my old enclosed trailer, id be absolutely pedal to the floor to maintain 55mph up hill which is pretty pathetic imo.
The stock trans tuning is garbage for towing on the highway, stupid thing shifts into OD at 65mph which is around 1500rpms which as soon as it sees a hill it will downshift and usually drop another gear to maintain 65.
So, anyway, i did the math, im 2k rpms at 65mph and 2200rpms(stock tire height) at 70mph with 4.56 gears which for towing is perfect imo for stock tuning.
OR should i tune it and see how it does before spending 2500 to regear and rebuild my axles? But considering the cost of studs and potential additional trans wear, the cost isnt so high thinking long term.