Cruise control and towing heavy - no no

[SnoKing]

View attachment 107264
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

NO it is RAM's way, no other choice available in SRW. If you read the thread, it is about a cruise control issue not a diff selection!

 

[Cummins2014]

NO it is RAM's way, no other choice available in SRW. If you read the thread, it is about a cruise control issue not a diff selection!

deleted

 

[SnoKing]

Well, I asked the question, you seem to be intent on thinking its a issue, I have towed thousands of miles here in the mountain west. IMO its not wise to tow in cruise on steep grades ,and the truck is doing something it doesn't want to in cruise . Take it to a dealer let them sort it out if you think something is wrong, no ones advice or whatever has satisfied you. If its an issue then we certainly can't fix it for you.

Give it a rest. No one else seems to had a similar issue, and as I stated taking it off cruise control resolved the shifting issue, as I stated early in the thread.

 

[Cummins2014]

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.

Give it a rest. No one else seems to had a similar issue, and as I stated taking it off cruise control resolved the shifting issue, as I stated early in the thread.

I did ,I deleted that reply, you don't seem to be listening. Good luck with the problem.

 

[SnoKing]

It that before or after you are having these


I did ,I deleted that reply, you don't seem to be listening. Good luck with the problem.

OK, I give up, you win!!!!

 

[Cummins12V98]

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.

If you run TH it will stay in a better gear for the speed.

 

[Cummins12V98]

View attachment 107264
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

Hey why didn't you get 3.73's in that new white thing in your pic???

 

[Cummins12V98]

I use cruise going up and down the passed. I use the gear selector to down shift before it drops speed and gear down for higher rpm's descending. Works great.

 

[6V92TA]

If you run TH it will stay in a better gear for the speed.

I do run it in TH. but I still lock out 6th when I run under 60 mph. with the 410 68RFE setup it runs about 1700 @ 60

 

[SnoKing]

I do run it in TH. but I still lock out 6th when I run under 60 mph. with the 410 68RFE setup it runs about 1700 @ 60

Oh you are saying 6th gear is 60 at 1700. Which is about right. I do the same in 5th gear, and in tow haul is does not shift to 5th until 55 MPH. I lock out 6th gear while towing, just for down hills, as it will not shift to 6th until 65 MPH. Yet again I can cruise at 80 in 6th gear at 1750 RPMs.

 

[6V92TA]

Something does not sound right. You sure you have 4.10's?

positive... when I bought the truck it had a sticker that quoted the 100 dollar optional rear end that comes with the cool finned aluminum diff cover.

 

[SnoKing]

positive... when I bought the truck it had a sticker that quoted the 100 dollar optional rear end that comes with the cool finned aluminum diff cover.

I edited that post after using a gear calculator.

In your case with the 68RFE 4.10's are important to get the load moving. With the Aisin transmission this not an issue and 1st gear becomes almost a worthless gear with 4.10's as Ron has noted in the past threads on the subject.

Note: This was not really a thread about gear ratios we have already had many of those in the past. The conclusion for many is the RAM got it right for the SRW trucks that have Aisin transmission's. For those that have 68RFE transmission's, getting a load moving is a issue for both the SRW and DRW when geared with 3.42s.

 

[6V92TA]

Snoking, there isn't that big of a difference in ratio's between the 68 and the Aisin... and any automatic transmission running in 1st is also using the torque converter which is a torque multiplier. any torque converter can multiply torque as much as much as 5 times.. so trust me when I say this truck doesn't have any problem pulling a 5th wheel out of the hole, or up a grade ... its your rather mundane DRW Tradesman with 410 gearing and its rated to pull a 21k trailer. a 2015 with the HO engine only has 8% more torque than the standard engine and 4% more HP to begin with, and it has 20% less gear reduction in the rear end with a 342 gear, so you probably lay less power to the ground with a2015 HO and 342 gears ( gear range for gear range) than a standard truck with 410's

 

[SnoKing]

Snoking, there isn't that big of a difference in ratio's between the 68 and the Aisin... and any automatic transmission running in 1st is also using the torque converter which is a torque multiplier. any torque converter can multiply torque as much as much as 5 times.. so trust me when I say this truck doesn't have any problem pulling a 5th wheel out of the hole, or up a grade ... its your rather mundane DRW Tradesman with 410 gearing and its rated to pull a 21k trailer. a 2015 with the HO engine only has 8% more torque than the standard engine and 4% more HP to begin with, and it has 20% less gear reduction in the rear end with a 342 gear, so you probably lay less power to the ground with a2015 HO and 342 gears ( gear range for gear range) than a standard truck with 410's

Go have a thread with Cummins12V98 on towing heavy with the 68RFE. He has experience with that and an Aisin transmission'd truck.

BTW the final gear ratio of a 3.42 truck in 5th is about the same as a 4.10 in 6th. I do not tow in 6th, as that is a bobtail cruising gear. So with the Aisin both have 5 important gears. With the 4.10 1st being not really needed and with the 3.42 truck 6th is a gear cruising gear. Best of both world!

 

[ram17]

Snorking, to get back to the original post, it seems that under specific circumstances - steep grade, heavy load, high altitude(??), and HEAVY HEAD WINDS, CC gets it wrong. It also appears that if any of those circumstances are missing then there is no problem. I suspect that head winds may be the variable that CC can't properly address because of potentail quick change and multiple minute changes. For example, a mild change in the head wind speed can be caused any number of factors (small heading change, passing 18 wheeler, normal wind speed change, terrain change, etc.)

 

[SnoKing]

Snorking, to get back to the original post, it seems that under specific circumstances - steep grade, heavy load, high altitude(??), and HEAVY HEAD WINDS, CC gets it wrong. It also appears that if any of those circumstances are missing then there is no problem. I suspect that head winds may be the variable that CC can't properly address because of potentail quick change and multiple minute changes. For example, a mild change in the head wind speed can be caused any number of factors (small heading change, passing 18 wheeler, normal wind speed change, terrain change, etc.)

The hard pull on I-8 leaving Arizona and head to San Diego was certainly a special case with the wind blowing 40-50 with maybe higher gusts. The second case leaving I-15 on 138 head up the hill towards Palmdale was just a steep pull. Tomorrow we have some good pulls North of Yakima as we cross back into Western Washington. Might try cruise again and see if condition returns.

 

[Cummins2014]

I use cruise going up and down the passed. I use the gear selector to down shift before it drops speed and gear down for higher rpm's descending. Works great.

I do use cruise for the descending, or long grades that are consistent, and you can hold the speed in a certain gear, but as far as letting it do its thing, NO.

Heres a question for Kthaxton while we are on the subject of cruise on steep grades. Towing heavy up Daniels, cruise or no cruise the last couple miles or so of that canyon.

 

[kthaxton]

I do use cruise for the descending, or long grades that are consistent, and you can hold the speed in a certain gear, but as far as letting it do its thing, NO.

Heres a question for Kthaxton while we are on the subject of cruise on steep grades. Towing heavy up Daniels, cruise or no cruise the last couple miles or so of that canyon.

While I've yet to tow my current trailer up Daniel's, I would not use cruise if I did. I generally do not use cruise on reasonably steep grades.

 

[6V92TA]

alright Kthaxton, an inquiring mind wants to know what do you do on unreasonably steep grades.

 

[kthaxton]

alright Kthaxton, an inquiring mind wants to know what do you do on unreasonably steep grades.

Even less cruise control......