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  1. Wrenchmonkey316

    6.9/7.3 cooling system additive

    I need the additive that helps prevent cavitation. What does the bottle look like? Does anyone know where to get it.
  2. Wrenchmonkey316

    C6 overheating mysterious cause

    I swapped it for a new Napa one and it’s working, for now. I did a good long test drive today with the deep pan and rapid cooler upgrades. I took it up long grades at freeway speeds and up some really steep grades going slow on residential streets as well. It never got hot. It stays pretty cool...
  3. Wrenchmonkey316

    The rear tank doesn’t like to take fuel

    Thank you. I’ll check it.
  4. Wrenchmonkey316

    C6 overheating mysterious cause

    Yeah it got really hot once and did that. I just noticed that the 2nd fan clutch I just bought spins about 4-5 times when I shut off the engine. So frustrating. No more Napa brand fan clutch for me. Sad
  5. Wrenchmonkey316

    The rear tank doesn’t like to take fuel

    My back tank is so bad anything more than minimum pressure to make a tiny little trickle and it pops the handle. Full tank = standing with your hand barely on the trigger for 20-30 minutes. I’m not using it at all except for low fuel situations on the front tank. I end up searching around for #2...
  6. Wrenchmonkey316

    Getting ready to install my c6 cooling upgrades

    My c6 has the 4th gear added. Haha yeah I bet y’all were like 75 mph!?!? I wasn’t thinking about that earlier when we were talking about the differential gear ratio. First one I’ve had with the OD unit. Does anybody know how that shift point is adjusted? Everything else shifts at around 2k with...
  7. Wrenchmonkey316

    Getting ready to install my c6 cooling upgrades

    So I went back and cycled through the gears slowly again multiple times, pausing for a few seconds each one. Finally I got it to shift. Checked the level and it was barely showing on the stick. Added some more a few times and it seems good now. It took 9.5 quarts! I’ll take it out for a short...
  8. Wrenchmonkey316

    Getting ready to install my c6 cooling upgrades

    It won’t shift. Help!
  9. Wrenchmonkey316

    Getting ready to install my c6 cooling upgrades

    I ended up putting about 10 lbs on the filter bolts accidentally by not wearing my glasses. Oof. It’s not stripped so I’m ok.. right??
  10. Wrenchmonkey316

    Getting ready to install my c6 cooling upgrades

    Picture of the new filter
  11. Wrenchmonkey316

    Getting ready to install my c6 cooling upgrades

    It’s full and it won’t shift. Help
  12. Wrenchmonkey316

    Getting ready to install my c6 cooling upgrades

  13. Wrenchmonkey316

    The rear tank doesn’t like to take fuel

    Thank you! I enjoyed that thoroughly.
  14. Wrenchmonkey316

    The rear tank doesn’t like to take fuel

    I agree. Death to the flapper thing sounds like a viable option. I’m not sure if it has one cuz I can’t see anything in there.
  15. Wrenchmonkey316

    C6 overheating mysterious cause

    I drive in the slow lane usually I’m running an overdrive unit so it’ll do 75 easy if i want to burn a ton of fuel. Doesn’t get it hot though unless you get on a steep grade. On hills it doesn’t matter if you’re going fast or 10 mph, it just heats up quickly.
  16. Wrenchmonkey316

    The rear tank doesn’t like to take fuel

    I’m not sure you guys are getting the full picture. It will only accept the equivalent of an old guy labor peeing when the prostate is acting up lol. Ive also noticed on the front tank that same issue of needing to do half throttle and depth/angle adjustment to stop it from popping the handle.
  17. Wrenchmonkey316

    The rear tank doesn’t like to take fuel

    I don’t know. How do I check?
  18. Wrenchmonkey316

    The rear tank doesn’t like to take fuel

    I refuse to like this comment lol
  19. Wrenchmonkey316

    C6 overheating mysterious cause

    It will blow fluid out the top if I get it too hot. I did I once already. It has 32” off road so the brake stand test might not work well? I have been shooting it with a temp sensor to confirm my stock gauge is still a functional dummy gauge and it’s fine, (no) is safe ( r ) is stop time (mal)...
  20. Wrenchmonkey316

    Getting ready to install my c6 cooling upgrades

    Also was thinking about plugging up the radiator/trans cooling ports so I can run the two cooling systems separately. I am thinking it could maybe help with the troubleshooting process to separate them and monitor results with the two separate temp gauges.
  21. Wrenchmonkey316

    C6 overheating mysterious cause

    I’m upgrading the transmission cooling system because it seems to be what is causing the overheating issue. When I took it to the diesel shop the radiator shop and the transmission shop they all said the transmission, radiator and engine are great. I’ve done a compression test, timing, fan...
  22. Wrenchmonkey316

    Getting ready to install my c6 cooling upgrades

    I ordered and received the deep pan and rapid cooler y’all recommended. I have a small aux cooler already existing in front of the ac condenser so I was hoping I could mount the new rapid cooler one in-line right below the existing one to make the total surface area of both trans coolers about...
  23. Wrenchmonkey316

    The rear tank doesn’t like to take fuel

    When I try to fill the rear tank it acts like it’s full. If you pump extremely slow it’ll fill but who wants stand there holding the lever in the the barely pumping position for about 30 minutes. Is there an obstruction or one-way flap that can potentially become an issue? Is there a vent that...
  24. Wrenchmonkey316

    Anyone done a large aux c6 trans cooler?

    But this time around I’m definitely going to be putting the fluid in when I do the pan and the aux cooler with a fan.
  25. Wrenchmonkey316

    Anyone done a large aux c6 trans cooler?

    Yeah that totally makes sense. Show’s you one thing for sure, I usually let the quick lube do that part if I can avoid it. :/

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