Ram1683
Member
Hey everybody. I just did a ton of reading on here about the revmax heater bypass. I installed mine months ago but since late October as the cold set in I could drive an hour and not have the trans touch 100⁰. My issue is the trans acts like a different animal until i can get it to 120ish which isnt easy. I called ZF and spoke with them, they told me 130⁰ range I should be fine but an hour at 80⁰ isn't good. It needs to warm up to shift properly. I thought about pulling the just heater block off plate. I have a 180 stat so in my head trans would sit in the 160⁰ range. On here I read that you shouldn't run just the thermo bypass, either all or nothing. What would the harm be by running the warmer but not the thermostat?