Cruise control and towing heavy - no no

[kthaxton]

You'll have to remind me....which rpms are totally useless to use?

 

[SnoKing]

You'll have to remind me....which rpms are totally useless to use?

Again????????????????????

 

[6V92TA]

You'll have to remind me....which rpms are totally useless to use?

place quote from Cummins ISB operation and Maintenance manual here. QUOTE
CAUTION

Do not operate the engine beyond the maximum engine speed. Operating the engine beyond the maximum engine speed can cause severe engine damage. Use proper operating techniques for the vehicle, vessel, or equipment to prevent engine overspeed. The maximum engine speed specification is listed in Maintenance Specifications (Section V).


Cummins® engines are designed to operate successfully at full throttle under transient conditions down to peak torque engine speed. This is consistent with recommended operating practices. QUOTE

 

[Cummins12V98]

I want to know if he changes filter from top or bottom???? Also is he doing partial fluid changes?????

 

[6V92TA]

and one more QUOTE
CAUTION

Do not operate the engine at full throttle below peak torque rpm (refer to engine dataplate for peak torque rpm) for more than 30 seconds. Operating the engine at full throttle below peak torque will shorten engine life to overhaul, can cause serious engine damage, and is considered engine abuse. QUOTE

 

[kthaxton]

place quote from Cummins ISB operation and Maintenance manual here. QUOTE
CAUTION

Do not operate the engine beyond the maximum engine speed. Operating the engine beyond the maximum engine speed can cause severe engine damage. Use proper operating techniques for the vehicle, vessel, or equipment to prevent engine overspeed. The maximum engine speed specification is listed in Maintenance Specifications (Section V).


Cummins® engines are designed to operate successfully at full throttle under transient conditions down to peak torque engine speed. This is consistent with recommended operating practices. QUOTE

I'm referring to all the various RPM points in the middle that supposedly are useless.....i.e. the rpm's that 3.73 will put you at in 5th.

 

[6V92TA]

Kthaxton, I think that question has to be answered by the user of a particular truck... inmy case with 410 gearing I generally lockout 6th gear except when travelling with a load above 60mph.

 

[SnoKing]

place quote from Cummins ISB operation and Maintenance manual here. QUOTE
CAUTION

Do not operate the engine beyond the maximum engine speed. Operating the engine beyond the maximum engine speed can cause severe engine damage. Use proper operating techniques for the vehicle, vessel, or equipment to prevent engine overspeed. The maximum engine speed specification is listed in Maintenance Specifications (Section V).


Cummins® engines are designed to operate successfully at full throttle under transient conditions down to peak torque engine speed. This is consistent with recommended operating practices. QUOTE

Yep, 1600 RPMs.

Look guys I have one final leg of 250 miles to complete Sunday of a 2000 mile trip. I have towed from East Valley of Phoenix to San Diego, up through California on I-15, 138, 58, 99, I-5, 97 and 97 through central Oregon. Gone from sea level to 4000 feet in a short distance, climbed up and down grades at high as a little over 5K on this trip. Truck has 42K on it with a lot of towing. When you have done that in a similar truck with the HO Aisin with 3.42, 24,500 combined weight(And I would add a high profile 5th wheel that is 13'3") and find a problem, then come and talk to me. Other than that you have no experience with such things and do not know what you are talking about.

BTW this thread is about a cruise controller issue that i had twice on extreme pulls. Turning off the CC allowed the truck to perform as designed towing heavy.

 

[TCDiesel]

I Qualify....

 

[kthaxton]

Yep, 1600 RPMs.

Look guys I have one final leg of 250 miles to complete Sunday of a 2000 mile trip. I have towed from East Valley of Phoenix to San Diego, up through California on I-15, 138, 58, 99, I-5, 97 and 97 through central Oregon. Gone from sea level to 4000 feet in a short distance, climbed up and down grades at high as a little over 5K on this trip. Truck has 42K on it with a lot of towing. When you have done that in a similar truck with the HO Aisin with 3.42, 24,500 combined weight(And I would add a high profile 5th wheel that is 13'3") and find a problem, then come and talk to me. Other than that you have no experience with such things and do not know what you are talking about.

Actually, when you do that with 3.73's, then you can tell us how useless they are. None of the above proves that 3.73 won't work.

 

[SnoKing]

Actually, when you do that with 3.73's, then you can tell us how useless they are. None of the above proves that 3.73 won't work.

I never said 3.73 were useless. What I said is that the 3.42's do the job fine and allow for high speed bobtail cruising as an extra bonus. 80 MPH at 1750 RPM's. 3.42's are better than 4.10's and 3.73's for bobtail times, yet work fine up to RAM tow ratings, providing one has the Aisin's lower starting gears.

 

[SnoKing]

If I was going to tow 65 MPH then 3.73's in 6th would be OK. If I was going to tow 70 MPH then 3.42's in 6th would be fine(Or maybe you would have to tow at 75 to get up into the torque curve.)

 

[Cummins2014]

Yep, 1600 RPMs.

Look guys I have one final leg of 250 miles to complete Sunday of a 2000 mile trip. I have towed from East Valley of Phoenix to San Diego, up through California on I-15, 138, 58, 99, I-5, 97 and 97 through central Oregon. Gone from sea level to 4000 feet in a short distance, climbed up and down grades at high as a little over 5K on this trip. Truck has 42K on it with a lot of towing. When you have done that in a similar truck with the HO Aisin with 3.42, 24,500 combined weight(And I would add a high profile 5th wheel that is 13'3") and find a problem, then come and talk to me. Other than that you have no experience with such things and do not know what you are talking about.

BTW this thread is about a cruise controller issue that i had twice on extreme pulls. Turning off the CC allowed the truck to perform as designed towing heavy.

Not sure anyone here can help you on your issue. Although I miss some of your criteria , I am only 21,500 combined actual weight, and the 68RFE, not the Aisin.

Your problem is the cruise control on extreme pulls, my question, and I don't think anyone asked it, but is it smart to let the cruise do its thing on a extreme pull. Just asking, I wouldn't know, I don't use the cruise on extreme pulls. I want to control what goes on. Maybe its common to use cruise on extreme pulls, just never heard anyone talk about it.

 

[SnoKing]

Not sure anyone here can help you on your issue. Although I miss some of your criteria , I am only 21,500 combined actual weight, and the 68RFE, not the Aisin.

Your problem is the cruise control on extreme pulls, my question, and I don't think anyone asked it, but is it smart to let the cruise do its thing on a extreme pull. Just asking, I wouldn't know, I don't use the cruise on extreme pulls. I want to control what goes on. Maybe its common to use cruise on extreme pulls, just never heard anyone talk about it.

I use CC a lot. I had DVT blood clot issues, so holding pedal for a long time is not good. I like move my legs and feet around when diving for hours at a time. I do come off CC when conditions warrant it.

 

[6V92TA]

but is it smart to let the cruise do its thing on a extreme pull. Just asking, I wouldn't know, I don't use the cruise on extreme pulls. I want to control what goes on. Maybe its common to use cruise on extreme pulls, just never heard anyone talk about it.

answer is cruise control doesn't anticipate steep hills very well but it does fine for normal use.

funny but I bet there are a bunch of people on ths forum who pull trailers, just because thats the best use for these trucks. as far as me, this is my fiver at the Alpine Visitor Center in Rocky Mountain national park.. 11800 feet.. no, I don't have any experience, I had it airlifted by 2 Chinook Helicopters. LOL

 

[SnoKing]

answer is cruise control doesn't anticipate steep hills very well but it does fine for normal use.

funny but I bet there are a bunch of people on ths forum who pull trailers, just because thats the best use for these trucks. as far as me, this is my fiver at the Alpine Visitor Center in Rocky Mountain national park.. 11800 feet.. no, I don't have any experience, I had it airlifted by 2 Chinook Helicopters. LOL

Experience with 3.42's was the point.

 

[SnoKing]

answer is cruise control doesn't anticipate steep hills very well/QUOTE]

Correct, it will loose 2 MPH and the pick them back up.

 

[6V92TA]

or it will downshift and hunt for a gear...depending on throttle position and vehicle speed

 

[6V92TA]

or when you are descending a long grade it will downshift one or two ranges and redline the engine trying to hold your speed back on steep declines. LOL sometimes its better to select the proper transmission range instead of letting a computer do it

 

[gsbrockman]

Yep, 1600 RPMs.

Look guys I have one final leg of 250 miles to complete Sunday of a 2000 mile trip. I have towed from East Valley of Phoenix to San Diego, up through California on I-15, 138, 58, 99, I-5, 97 and 97 through central Oregon. Gone from sea level to 4000 feet in a short distance, climbed up and down grades at high as a little over 5K on this trip. Truck has 42K on it with a lot of towing. When you have done that in a similar truck with the HO Aisin with 3.42, 24,500 combined weight(And I would add a high profile 5th wheel that is 13'3") and find a problem, then come and talk to me. Other than that you have no experience with such things and do not know what you are talking about.

BTW this thread is about a cruise controller issue that i had twice on extreme pulls. Turning off the CC allowed the truck to perform as designed towing heavy.

Additionally....whenever you accrue 362k miles of seat time (over 50% towing) with a set of 3.73’s, maybe you can make a true informed decision. Until then....all you’re doing is opining in regards to 3.73’s.

Your erection for 3.42’s are likened to Stalin and Hitler....”it’s either my way or the highway”.

Maybe a MOD could change your user name to KnowItAllKing