We just bought a brand new 2500 Limited Longhorn a few months ago. When we are trailering and the exhaust brake is on, I have noticed when I come to slow down it shifts very hard. Is this a normal process of the transmission learning driving habits?
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Rough Downshifts
- Thread starter marcd118
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sstoner911
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At first I thought you had the HO/AISIN, but I see that you have the 2500. I never really thought my past 68RFE Rams downshifted hard even with Tow/Haul mode and FULL EB. You will see downshifts in the 2800 RPM range which is normal. You ca feel the downshifts for sure - turn the Tow/Haul off and you will notice a difference in the down shifts.
I just bought a 2022 ram 2500 crew cab 4x4 Cummins yesterday 19 Dec. I have been learning the feel of the truck and the shifting. When I have my truck in auto, it has what feels like a hard shift from the transmission. When I put the truck in full, it is very smooth and I dont feel the hard shift anymore. I kept using the different modes throughout the last two days and I am convinced that it only has a hard shift when it is in auto. My understanding from my research this far is that it will be more noticeable when you are in tow/hall mode because of the aggressive shifting. My understanding of the two different transmissions are that the AISIN is a heavy duty transmission therefore a hard shifting transmission. The 68RFE is intended to have a more comfortable shifting set up for the lower ratings of the standard 850ft pounds of torque you find in the 2500 series. Good luck getting to know your truck. I have not owned a diesel truck since about 1991 time frame. So I have a lot of learning to do. Just out of curiosity, have you read about the engine block heater chord? The engine is supposed to have the block heater installed directly from cummins. Chrysler just saves a few bucks by not installing the chord. Damn accountants.
The Aisin reputation for hard shifting, according to internet trolls and anyone that hasn't driven a 19+ HO, is far worse than the actual transmission.
Most consider the EB more aggressive, but they've done a good job of working out shifting issues. No complaints on mine since it relearned after a ECU/TCU flash last spring. It seemed harsh at first, but settled right in.
Most consider the EB more aggressive, but they've done a good job of working out shifting issues. No complaints on mine since it relearned after a ECU/TCU flash last spring. It seemed harsh at first, but settled right in.
I have driven 2500 and 3500 trucks since the late 80s, and they will never be as comfortable all the way around as a 1500 type truck. I agree that the shifts are not rough per se, just adequate for the task at hand. I was pulling an 8k (wet weight) travel trailer with my 2019 1500 crew cab Laramie, 5.7, 3.21 gears. The drive train did great, I just didn't feel comfortable with the suspension as a whole for this weight level. I am very comfortable with the firm, yet very comfortable for a 2500, suspension.
I would say my non-HO transmission downshifts a bit harder with the exhaust brake and tow haul on, especially at lower slowing down speeds. I don't sense it as a problem, I just notice it especially the last couple of downshifts before the EB cuts out a low speed. I just assumed it was normal?
Both trans up/downshifts are more aggressive in TH.
Most that have driven both (19+) say the EB hits harder with the Aisin. I think it goes lower too. Mine goes to around 11-12MPH/900RPM in 2nd gear before it releases.
Most that have driven both (19+) say the EB hits harder with the Aisin. I think it goes lower too. Mine goes to around 11-12MPH/900RPM in 2nd gear before it releases.
What flash (TSB) did you get.
What flash (TSB) did you get.