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Old 07-30-2020, 01:45 PM   #29
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One item that is often overlooked in the cooling system is the fan clutch, which can fail gradually. This will be the case when normal towing on interstates, etc everything is fine, and then, on hills the temperature climbs way up. If you are able to pull over and run the engine at a fast idle to bring the temp down. This usually indicates everything normal.
As to your towing problems; if you are not comfortable at 70-75 mph, then don't! Your comfort and safety are your concerns, not the truck behind you or ahead. Relax and drive at what feels best for you. The destination is what is important, not how fast you got there.
Also, never believe anything a car salesman says.
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Old 07-30-2020, 03:31 PM   #30
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75-80 is nuts towing. not safe and accident waiting for a victim. you have an RV for crying out loud what is the hurry. You know where i see those people oulling so fast ......in an accident or replacing 2 or 3 tires a day. and then complain they had such a horrible day the trailer tires kept popping like baloons.
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Old 07-30-2020, 03:34 PM   #31
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62-65 good enough for me. If someone wants/needs to pass theyíve got a steering wheel.
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Old 07-30-2020, 04:17 PM   #32
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We keep our top speed at 65-68. We feel it's more relaxing to drive at these speeds and the fuel efficiency is better.
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62-65 good enough for me. If someone wants/needs to pass theyíve got a steering wheel.
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Old 07-31-2020, 03:24 PM   #33
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Originally Posted by brucenem View Post
One item that is often overlooked in the cooling system is the fan clutch, which can fail gradually. This will be the case when normal towing on interstates, etc everything is fine, and then, on hills the temperature climbs way up. If you are able to pull over and run the engine at a fast idle to bring the temp down. This usually indicates everything normal.
As to your towing problems; if you are not comfortable at 70-75 mph, then don't! Your comfort and safety are your concerns, not the truck behind you or ahead. Relax and drive at what feels best for you. The destination is what is important, not how fast you got there.
Also, never believe anything a car salesman says.
Winner, winner, chicken dinner....................

Fan clutches have been around since the '60's but are so ignored........... Motorhomes on the earlier Sprinter chassis had lots of problems with the fan clutches. Mine worked wonderfully. temp would climb to about 215, fan would suddenly come on almost scaring you till you got used to it, and then the engine would cool down to 190 and the fan gets quiet. This is a bi-metallic temp sensor type. Many vehicles have electric controlled fan clutches, wires running up the back of the radiator and crossing over to the front of the clutch, like my RAM truck. Again, when the fan is running, YOU KNOW IT. Sounds like you got a bunch of MGM Lions under the hood.

I have suddenly had thermostat problems with mine. Temp was slightly elevated to the point where the fan was coming on and dropping out. Very loud. Had thermostat stick twice and temp went up (not to boil over) but suddenly dropped. Installed a genuine Cummins thermostat ($56!!) and now it runs like it is supposed to at under the 200F mark. I've never had any luck with aftermarket thermostats.

Charles
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Old 08-01-2020, 05:03 PM   #34
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Quote:
Originally Posted by brucenem View Post
One item that is often overlooked in the cooling system is the fan clutch, which can fail gradually. This will be the case when normal towing on interstates, etc everything is fine, and then, on hills the temperature climbs way up. If you are able to pull over and run the engine at a fast idle to bring the temp down. This usually indicates everything normal.
As to your towing problems; if you are not comfortable at 70-75 mph, then don't! Your comfort and safety are your concerns, not the truck behind you or ahead. Relax and drive at what feels best for you. The destination is what is important, not how fast you got there.
Also, never believe anything a car salesman says.
Quote:
Originally Posted by consolenut View Post
75-80 is nuts towing. not safe and accident waiting for a victim. you have an RV for crying out loud what is the hurry. You know where i see those people oulling so fast ......in an accident or replacing 2 or 3 tires a day. and then complain they had such a horrible day the trailer tires kept popping like baloons.
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62-65 good enough for me. If someone wants/needs to pass they’ve got a steering wheel.
I agree with all the above, towing faster is just an accident waiting to happen, especially towing a TT.

Truck traveling at 65mph... TT doing what???

How NOT to tow a travel trailer
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Old 08-01-2020, 09:33 PM   #35
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Not saying go as fast as possible but if you canít keep up with traffic your causing more potential of problems. Knowing your setup is key. Utah is 85 on the 15. Im not going 85 but Iím not going 65 and being passed by every simi. Let the flaming begin.
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Old 08-01-2020, 09:37 PM   #36
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I donít, and wonít drive my empty p/u at 85. Everyone should do what they think best tho.
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Old 08-02-2020, 08:43 AM   #37
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Not saying go as fast as possible but if you canít keep up with traffic your causing more potential of problems. Knowing your setup is key. Utah is 85 on the 15. Im not going 85 but Iím not going 65 and being passed by every simi. Let the flaming begin.
My TT tires are rated for 65, I'll occasionally hit 68-70 to pass but otherwise 65ish is what I'm traveling. Absolutely not a problem here in Canada but we spend winters in CA/AZ/NV mostly I10 and sections are posted 80 but have yet to actually be holding up traffic. Some semi's go flying by but just as many are doing the 65-68 that we are. I'm talking TT's here, I'm sure it's different with a 5th wheel with the inherent stability and most likely larger, heavier higher speed rated tires.

We have stayed put due to wind warnings in CA where you see semi's blown over, I can see excess speed towing a TT a recipe for a perfect youtube episode.
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Old 08-02-2020, 12:22 PM   #38
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I am seeing the new ST tires rated for 75mph and like the Goodyear ST Endurance rated for 87mph. I do not not if they improved the manufacturing of just stuck a new speed rating on the tire. I would hope they improved the manufacturing.
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