MDS deactivation
- Thread starter Johnny7
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Wild one
Senior Member
- Joined
- Jan 17, 2016
- Posts
- 23,650
- Reaction score
- 54,306
- Ram Year
- 14 Sport
- Engine
- 5.7
Spend 16 minutes and watch this video,you might change your mind. You need an unlocked PCM / bypass cable,and tune to disable it.While you're at,you'll also want a non-mds cam / 8 non-mds lifters and Ma Mopars mds block off plugs for a 6 speed 5.7 or 6.4 Challenger to properly disable the mds.
Is MDS Damaging Your HEMI? The Answer May Surprise You!
I feel like MDS has been unfairly made the culprit for the lifter failures we see on Gen 3 Hemi engines. In this video I explain exactly how the system works...
www.youtube.com
- Joined
- Nov 3, 2016
- Posts
- 4,466
- Reaction score
- 9,092
- Location
- Eastern WA
- Ram Year
- 2020 Limited
- Engine
- Hemi 5.7L non-Etorque
The short answer is no.
Mojo88
Senior Member
- Joined
- Feb 4, 2024
- Posts
- 705
- Reaction score
- 1,819
- Location
- Rhode Island
- Ram Year
- '19 Longhorn Gen5 ORG
- Engine
- Hemi 5.7L non-eTorque
He's got a 2019 "Classic". Were those PCM's locked starting in 2019? I know the 5th Gens are........
Wild one
Senior Member
- Joined
- Jan 17, 2016
- Posts
- 23,650
- Reaction score
- 54,306
- Ram Year
- 14 Sport
- Engine
- 5.7
Chrysler started locking the PCMs in everything starting in 2015,starting in 2018 you need the Smart Access cable on top of an unlocked pcm .
Dodge 2018+ Smart Access Cable – HP Tuners
View HP Tuners' Dodge Smart Access Cable, required for tuning all supported 2018+ Dodge / Jeep / RAM / Chrysler vehicles. Enables read, write, and special functions.
www.hptuners.com
GTyankee
Senior Member
- Joined
- Nov 2, 2020
- Posts
- 12,391
- Reaction score
- 17,459
- Location
- El Cajon Calif. 92021
- Ram Year
- 2016
- Engine
- 3.0 ecodiesel
could a Ram owner keep their speed above 75 MPH / 120.701 KPH ?
to keep the MDS from engaging ?
Of course, in Canada an owner may have to have a Traffic Court Judge on the payroll
to keep the MDS from engaging ?
Of course, in Canada an owner may have to have a Traffic Court Judge on the payroll
- Joined
- Feb 9, 2025
- Posts
- 671
- Reaction score
- 1,310
- Location
- Louisiana
- Ram Year
- 2026 Limited
- Engine
- 3.0L TT H.O.
You can simply gear down manually (on the steering wheel), then run it back up to top gear to disable it.could a Ram owner keep their speed above 75 MPH / 120.701 KPH ?
to keep the MDS from engaging ?
Of course, in Canada an owner may have to have a Traffic Court Judge on the payroll
The OP was asking if there were an other simpler alternative to what you suggest and that the OP was already performing the "manually selecting the gear -/+" on the steering wheel ...
Last edited:
Wild one
Senior Member
- Joined
- Jan 17, 2016
- Posts
- 23,650
- Reaction score
- 54,306
- Ram Year
- 14 Sport
- Engine
- 5.7
Depending on what road you're on GT. Some of the secondary highways have a 80kmh/50 mph speed limit,and 120 clics/75 mph will get you taggedcould a Ram owner keep their speed above 75 MPH / 120.701 KPH ?
to keep the MDS from engaging ?
Of course, in Canada an owner may have to have a Traffic Court Judge on the payroll
The QE2 between Calgary and Edmonton is 110kmh's,and i've been on that road with the cruise set at 156 kmh's (that's where the cruise tops out on most Chryco vehicles,lol),and drove by the cops sitting off to the side with no issues during daylight hours,after dark,it's another story though,then you definitely want to slow down
1979PowerWagon360
Senior Member
- Joined
- Mar 19, 2019
- Posts
- 347
- Reaction score
- 489
- Location
- Central Florida
- Ram Year
- 2022 TRX
- Engine
- 6.2
The video was very interesting and he made several good points.
GTyankee
Senior Member
- Joined
- Nov 2, 2020
- Posts
- 12,391
- Reaction score
- 17,459
- Location
- El Cajon Calif. 92021
- Ram Year
- 2016
- Engine
- 3.0 ecodiesel
The few times that i have driven into Canada, i was up in the Ontario, Canada area.
I was driving my last 2009 Ram 1500 w/ the HEMI
Mostly around Toronto, but i went on up to Sudbury for a weekend, that was the first time that i ever had 3 things that i have never had before that trip.
JELLO SHOOTERS, & Black Flies with fantastic Canadian Steak without GMOs.
I felt like i was driving around that area at a Crawl
I was driving my last 2009 Ram 1500 w/ the HEMI
Mostly around Toronto, but i went on up to Sudbury for a weekend, that was the first time that i ever had 3 things that i have never had before that trip.
JELLO SHOOTERS, & Black Flies with fantastic Canadian Steak without GMOs.
I felt like i was driving around that area at a Crawl
Last edited:
Wild one
Senior Member
- Joined
- Jan 17, 2016
- Posts
- 23,650
- Reaction score
- 54,306
- Ram Year
- 14 Sport
- Engine
- 5.7
If you thought that video was interesting,you'll really like this 13 minute video,as it goes into detail on the hemi's somewhat substandard oiling system.
We look into the Hemi lifter failures and the dreaded Hemi tick
We unpack the lifter oiling issue that plague the late Hemi.Powellmachineinc.comIf you want to support us financially https://cash.app/$PowellMachine
www.youtube.com
Wild one
Senior Member
- Joined
- Jan 17, 2016
- Posts
- 23,650
- Reaction score
- 54,306
- Ram Year
- 14 Sport
- Engine
- 5.7
Everybodies favorite Uncle Tony has a couple video's that are also worth watching.The 2nd one is the better of the 2,but both are worth watching.
Gen 3 Hemi Camshaft Failure Mystery Explained!
Once we started digging into the Gen 3's mysterious cam and lifter issues we discovered a series of major design flaws within the construction of the block. ...
www.youtube.com
This is the one that's really worth watching.
A Closer Look At The Mopar Gen 3 Hemi And It's Often Fatal Flaw
Our first video concerning Mopar's Gen 3 Hemi's notorious camshaft and lifter failure phenomenon caused a lot of discussion and controversy. It has nothing ...
www.youtube.com
If you thought that video was interesting,you'll really like this 13 minute video,as it goes into detail on the hemi's somewhat substandard oiling system.
We look into the Hemi lifter failures and the dreaded Hemi tick
We unpack the lifter oiling issue that plague the late Hemi.Powellmachineinc.comIf you want to support us financially https://cash.app/$PowellMachine
Yep, seen this already ...
When I owned my HEMI powered RAM(s), I got into the habit of manually disengaging it now and then ... overall just leaving it alone letting it "do what it's supposed to do" by letting the "oil sending units" feed oil to an engine that is already compromised by worsened oil splash and lowered idle rpm ... it's really sad that the design flaw, moving the cam farther up in the block to allow for the VVT bs, that it did little to nothing for fuel economy, let alone going to a thinner recommended oil for the sake of some EPA bean counters that led to a lot folks having lifter/cam failure ...
Last edited:
Wild one
Senior Member
- Joined
- Jan 17, 2016
- Posts
- 23,650
- Reaction score
- 54,306
- Ram Year
- 14 Sport
- Engine
- 5.7
You better have,as i've posted it at least a dozen times by now
Absolutely, lol.
You better have,as i've posted it at least a dozen times by now
Rick, don't get discouraged/tired of posting good advice, its greatly appreciated and not everyone knows to search the RAMForum for the ton of info that is already here ...
Wild one
Senior Member
- Joined
- Jan 17, 2016
- Posts
- 23,650
- Reaction score
- 54,306
- Ram Year
- 14 Sport
- Engine
- 5.7
Thanks for the support J,it's very appreciated. I have a few haters on here,but i really could care less about them,as i'll still try to get info out,whether they like it or not.
DanAR
Senior Member
The lifter oiling issue is why I leave the stop/start system activated on my truck to minimize idling time and live with it. I’ve also got 5W-30 oil in it to in some hope that boosts oil pressure at idle a bit. Some good, thought-provoking videos. Thanks.
