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07-07-2020, 02:42 AM
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#1
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Member
Join Date: Aug 2017
Location: Oklahoma City
Posts: 32
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Ram 2500 tow/ haul
Well I have a new 2020 Ram 2500. I've had it a month now. 2600 miles. I've towed my 2670bh, and a tractor.
I would first like to say I love this truck, night and day difference between my 2017 tradesman and this bighorn.
So my issue is with the shift points with tow/ haul mode on, and with it off. Between 3rd and 4th, and 4th and 5th. Seem very similar. So when it shifts into 4th to me it should have about 400 more rpm s.
Has anyone experienced this. Thanks.
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07-07-2020, 04:43 AM
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#2
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Senior Member
Join Date: Jul 2013
Location: Liberty, Texas
Posts: 5,034
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Which engine, which transmission, and which rear end ratio?
__________________
2018 Ram 3500 Laramie CC DRW LWB 4X4 Cummins Aisin 3.73
Reese Goosebox 20K
2018 Heartland Landmark 365 Oshkosh
2008 Bigfoot 25C9.4 LB Cabover
2023 CanAm Defender SXS
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07-07-2020, 05:06 AM
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#3
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Member
Join Date: Aug 2017
Location: Oklahoma City
Posts: 32
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Yeah, sorry. You mean everyone can't read my mind. Jk.
I have a 6.7 CTD, 68rfe, with 3.73. Thanks
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07-07-2020, 10:02 AM
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#4
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Senior Member
Join Date: Jul 2019
Location: Richmond
Posts: 625
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I have a 2019 Ram 1500 with the 5.7 and 8 speed... in tow haul it never gets out of 7th gear... shifts points all are higher...under normal accel it shifts at about 3500 rpm from 1 to 2 and 2 to 3 with the trailer behind it... seems to work just fine but again, it's a 1500 big horn not a 2500.. most of the shifts after 3rd seem closer and don't have much difference in feel...RPM also is lower as I would expect with getting up in speed....forgot to add it's got the 3.91 rear gear...
Not sure if that helps or not
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07-07-2020, 02:39 PM
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#5
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Member
Join Date: Aug 2017
Location: Oklahoma City
Posts: 32
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Quote:
Originally Posted by Sarge2
I have a 2019 Ram 1500 with the 5.7 and 8 speed... in tow haul it never gets out of 7th gear... shifts points all are higher...under normal accel it shifts at about 3500 rpm from 1 to 2 and 2 to 3 with the trailer behind it... seems to work just fine but again, it's a 1500 big horn not a 2500.. most of the shifts after 3rd seem closer and don't have much difference in feel...RPM also is lower as I would expect with getting up in speed....forgot to add it's got the 3.91 rear gear...
Not sure if that helps or not
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Yeah, the shifts after 3rd do seem close.
What made me notice was when I was pulling my camper. It pulls fantastic down the highway and everything, but when I came to a stop then accelerated 1st, 2nd, and 3rd are good, then it shifts into 4th at around 1100 rpm., and lugs the engine.
My 17 never did this. I just wonder if it has something to do with the recall on the 68rfe. The recall had been done before I purchased the truck. A truck cannot be sold without recalls being completed. Thanks
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07-08-2020, 09:20 AM
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#6
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Senior Member
Join Date: Jul 2019
Location: Richmond
Posts: 625
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I don't get any lugging in 4th or even 5th or 6th... shifts are lower than 1,2,3 at 3500.....about 2800 or so.... but the engine never lags... wonder if the Diesel engines are set up to drop that much rpm in 4th and above? Doesn't seem right to me that the engine would lag and drop that much rpm as I'm sure you are still into the throttle as much or nearly as much as when you started off to get up to speed...
Wonder if the ECU is flashed correctly or if there is a TSB covering your type of complaint... I think I'd go on line or check with a good Chrysler tech to see if he thinks that's correct or knows of any TSB's covering it...JMHO... may be comparing apples and oranges with Gas and Diesel ECU settings...
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07-08-2020, 11:47 AM
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#7
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Senior Member
Join Date: Jul 2014
Location: Hemlock
Posts: 816
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Quote:
Originally Posted by Sarge2
I don't get any lugging in 4th or even 5th or 6th... shifts are lower than 1,2,3 at 3500.....about 2800 or so.... but the engine never lags... wonder if the Diesel engines are set up to drop that much rpm in 4th and above? Doesn't seem right to me that the engine would lag and drop that much rpm as I'm sure you are still into the throttle as much or nearly as much as when you started off to get up to speed...
Wonder if the ECU is flashed correctly or if there is a TSB covering your type of complaint... I think I'd go on line or check with a good Chrysler tech to see if he thinks that's correct or knows of any TSB's covering it...JMHO... may be comparing apples and oranges with Gas and Diesel ECU settings...
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Your 1,2,3 are 3500? That seems high. I have the 3500 HO Aisin so it’s a different trans but shift by 2700-2800 unless I am on the floor for some reason.
__________________
R.J. and Ginger
2019 Ram 3500 6.7 HO, Aisin Trans 3:73
Reese Goosebox
2019 Sandpiper 379FLOK
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07-08-2020, 05:38 PM
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#8
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Member
Join Date: Aug 2017
Location: Oklahoma City
Posts: 32
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I got my camper out yesterday. I needed to check my wdh setup, and actually measure it compared to the setup on the other truck.
So I did a few start and stops. So if I'm about half throttle like getting on the highway, with tow/haul on, the truck runs perfect. Shifts great, gets to around 2000rpm then shifts into 4th at 1400. Which is great.
If the speed limit is 55 and I'm only giving it a little throttle, that is when it shifts to soon and into 4th at about 1100rpm.
This is still a great truck just a little different than my 17. I've only towed a few times in this truck. Same transmission so I wasn't expecting to be any different.
Attachment 28525Attachment 28526
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07-19-2020, 01:43 PM
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#9
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Senior Member
Join Date: Apr 2017
Location: Sandy
Posts: 191
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Quote:
Originally Posted by RedRocket
Well I have a new 2020 Ram 2500. I've had it a month now. 2600 miles. I've towed my 2670bh, and a tractor.
I would first like to say I love this truck, night and day difference between my 2017 tradesman and this bighorn.
So my issue is with the shift points with tow/ haul mode on, and with it off. Between 3rd and 4th, and 4th and 5th. Seem very similar. So when it shifts into 4th to me it should have about 400 more rpm s.
Has anyone experienced this. Thanks.
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Well my truck is somewhat different and similar. I have a 2016 Ram 3500 with the HO Cummins and Aisin tranny. Between 5th and 6th in tow mode there is about a 200 RPM difference. For example at 68MPH in sixth the RPM is about 1800. So, between 6th and 4th I see about 400 RPM difference. I just go with what is needed to climb the grade and keep the RPM under control and not “lug” the engine.
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07-22-2020, 06:52 PM
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#10
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Member
Join Date: Aug 2017
Location: Oklahoma City
Posts: 32
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Quote:
Originally Posted by pdaniel
Well my truck is somewhat different and similar. I have a 2016 Ram 3500 with the HO Cummins and Aisin tranny. Between 5th and 6th in tow mode there is about a 200 RPM difference. For example at 68MPH in sixth the RPM is about 1800. So, between 6th and 4th I see about 400 RPM difference. I just go with what is needed to climb the grade and keep the RPM under control and not “lug” the engine.
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Thats true, I've found the power band is right in the 1800 area. If I'm running 65 yes its closer to 1500 rpm or so. And if I can run 68 to 70 that's right where she likes to be.
Sometimes that is faster than I want to run with my camper so I'll lock 6th out.
I love the power it makes at just 1800 rpms, its just impressive. 
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