How to check the health of your 68RFE - Dodge Cummins Diesel Forum
2013-2018 General Discussion General Chit Chat About the 2013 model year differences 6.7L 4th generation Cummins - NO ADVERTISING - Sponsored by: StarLite Diesel

 26Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 61 (permalink) Old 02-18-2019, 12:03 AM Thread Starter
Diesel Head
 
nick00less's Avatar
 
Join Date: Nov 2014
Location: Aww-Bree
Posts: 7,496
Thanks: 3,475
Thanked 1,803 Times in 1,226 Posts
iTrader Score: 0 reviews
How to check the health of your 68RFE

Please share what your CVI values are so we can get a rolling avg. that I can update this thread with

**UPDATE** Read Post #18

You can also use EzLynk (which is much easier)

So today I discovered something and I’d like to share it with anyone whose been curious about the health of their clutches. Are they worn? Are they ok? How do you check? For you OCD people who worry thinking they’ve damaged their clutches (or other components), even though you don’t have any CEL, there’s a quick way you can check.

The method I used was AlphaOBD. The information we’re looking for is CVI (Clutch Volume Index).

Taken from RevMax-

“Clutch Volume Index (CVI) is a calculated numerical value to indicate how much volume of transmission fluid was needed to apply a friction element without stroking the accumulator piston...As the friction material wears, the volume of fluid needed to apply the element increases.”

Taken from @TransEngineer -

“The CVI is a measure of how much oil it takes (in units of 1/64 in³) to apply the clutch. So, for example, a 4C CVI value of 42 means it takes 42/64 = .656 in³ to apply the 4C clutch.”

Basically as your values increase, this could either mean your clutches are wearing (requiring more fluid to hold them) or there could be a leak. @TransEngineer if I’m wrong on any of this feel free to correct me)

The ‘recommended’ CVI’s for our 68RFE are



The way you find out through AlphaOBD is choose the engine function and select MY2013-17. Then click connect.



Select Plotted Data tab up top. Beneath that select Start Scan. Then find tabs 20 and 21.



You’re looking for

-LR Clutch Fill Volume (Tab 20)
-OD Clutch Fill Volume (Tab 20)
-UD Clutch Fill Volume (Tab 21)
-2C Clutch Fill Volume (Tab 21)
-4C Clutch Fill Volume (Tab 21)

You will then activate each of these items by either double clicking them or right click and click Activate Selected. A green dot should appear to the far left. Turn truck on and go for a drive. During my tests I selected/activated a ton of additional windows (as you’ll see in my photos) however you only need to select the ones mentioned above. Shift 1-6 down the road a few times and the program should record your findings.

When you finish the units will be 0.00 to the far right but above that should be a recorded number that was logged while driving. The only ones that might not have a small red number will be LR and UD. That’s ok. Just use whatever number is in that column.

Results should look like this




Take each of the numbers recorded and multiply them by 64.



Voila! Now you have your CVI’s and at the very least a basic idea of your transmissions health.
@TransEngineer spent some time helping me so I figured I would pass the info along to anyone who might not have known either.




Sent from my iPhone using Tapatalk


'14 6.7 S465 tuned by CTT
'17 6.7 tuned by CTT
'18 6.7 S467.7 tuned by CTT
To view links or images in signatures your post count must be 3 or greater. You currently have 0 posts.
nick00less is offline  
The Following 15 Users Say Thank You to nick00less For This Useful Post:
2013_6.7 (02-18-2019), 2500/6 (02-19-2019), boshog (02-18-2019), cycling4life (03-02-2019), dieselgeek5.9 (02-19-2019), DJRobinson (02-19-2019), dvpvic (05-26-2019), gatorguy (02-19-2019), Jared Herzog (02-18-2019), MachAF (03-09-2019), NickBeek (03-01-2019), pwr2tow (02-18-2019), Show Killer (03-07-2019), str8t six (02-18-2019), Trowel2013 (02-18-2019)
Sponsored Links
Advertisement
 
post #2 of 61 (permalink) Old 02-18-2019, 10:17 AM
Diesel Head
 
K9Kodi's Avatar
 
Join Date: Dec 2011
Posts: 4,655
Thanks: 9
Thanked 676 Times in 478 Posts
iTrader Score: 0 reviews
Very impressive brother. Very impressive

--2015 2500, Crew Cab, Long Bed, 4x4, G56, Maximum Steel
- To Do List, 6" suspension,37" tires,4.56 Gears
--2006 2500 4x4 4 door long bed auto, 8" BDS, 37s
K9Kodi is offline  
post #3 of 61 (permalink) Old 02-18-2019, 10:29 AM
Cummins Nut
 
hooked55's Avatar
 
Join Date: Oct 2014
Location: SOCAL
Posts: 310
Thanks: 14
Thanked 13 Times in 13 Posts
iTrader Score: 0 reviews
WOW! Incredible stuff. And I always thought if the fluid is the right color, the right level on the stick, no burned smell, no leaks, and it shifted properly we were good to go. What next!

2014 2500 Laramie Crew, short bed. 2014 30’ 10k Timber Ridge TT, Nascar Nut.......
hooked55 is offline  
Sponsored Links
Advertisement
 
post #4 of 61 (permalink) Old 02-18-2019, 10:38 AM
Diesel Head
 
Lins's Avatar
 
Join Date: Nov 2016
Location: Yellowknife, NT, Canada
Posts: 2,431
Thanks: 9
Thanked 156 Times in 154 Posts
iTrader Score: 0 reviews
Nice to know alfaOBD can do this. I did a ton of research with my '02 1500 when it was giving me some trouble which had the 45RFE. I read about the CVI's a bunch but the only tools I could find that could do it were hundreds of dollars.

I could be wrong in how I'm explaining it, but when the trans re-learns, it is resetting the measuring your CVI's at various temps, shifts, etc. Although it is always learning and looks at the CVI's to adjust how it shifts.

2017 6.7L Ram 2500 Laramie Crew Cab Granite Crystal Sport Appearance Group, 68RFE, rear air suspension
Lins is offline  
post #5 of 61 (permalink) Old 02-18-2019, 11:02 AM
Diesel Freak
 
slayerfish's Avatar
 
Join Date: Apr 2011
Location: Windswept Plains of Colorado
Posts: 624
Thanks: 1
Thanked 24 Times in 24 Posts
iTrader Score: 0 reviews
Way too anal for this guy. it either works or it don't!

'16 2500 Bighorn 6.7 Cummins CCLB 4x4 68rfe Timbrens Hellwig // 2017 Hallmark 8.5' UTE Pop-Up.
slayerfish is offline  
post #6 of 61 (permalink) Old 02-18-2019, 11:23 AM
Cummins Nut
 
battlerattle's Avatar
 
Join Date: May 2017
Location: Spring Lake, NC
Posts: 366
Thanks: 4
Thanked 25 Times in 24 Posts
Garage
iTrader Score: 0 reviews
Make this a sticky!
dillonjm and hooked55 like this.


To view links or images in signatures your post count must be 3 or greater. You currently have 0 posts.

2016 2500 Laramie Longhorn 4wd CTD crewcab Granite Crystal Metalic, 2" Pure Performance triple rate leveling springs, Adjustable front Trackbar, Stealth Module
battlerattle is offline  
post #7 of 61 (permalink) Old 02-18-2019, 01:39 PM
Diesel Head
 
Join Date: May 2016
Location: New smyrna Beach, Fl
Posts: 1,420
Thanks: 9
Thanked 117 Times in 101 Posts
iTrader Score: 0 reviews
Quote:
Originally Posted by slayerfish View Post
Way too anal for this guy. it either works or it don't!
Its like doing a leak down test every month just to make sure your rings and valves are seating when you have no problems at all. I paid a lot of money for a truck so I can worry about it every time I drove it, if I wanted that I would have bought something a lot older and a LOT CHEAPER.

2015 2500 4x4 megacab automatic with ARE Z series topper
cjgoode is offline  
post #8 of 61 (permalink) Old 02-18-2019, 01:41 PM
Diesel Head
 
Lins's Avatar
 
Join Date: Nov 2016
Location: Yellowknife, NT, Canada
Posts: 2,431
Thanks: 9
Thanked 156 Times in 154 Posts
iTrader Score: 0 reviews
Quote:
Originally Posted by cjgoode View Post
Its like doing a leak down test every month just to make sure your rings and valves are seating when you have no problems at all. I paid a lot of money for a truck so I can worry about it every time I drove it, if I wanted that I would have bought something a lot older and a LOT CHEAPER.
Then why even comment on this thread?
BobSagetIsGod? likes this.

2017 6.7L Ram 2500 Laramie Crew Cab Granite Crystal Sport Appearance Group, 68RFE, rear air suspension
Lins is offline  
post #9 of 61 (permalink) Old 02-18-2019, 01:42 PM Thread Starter
Diesel Head
 
nick00less's Avatar
 
Join Date: Nov 2014
Location: Aww-Bree
Posts: 7,496
Thanks: 3,475
Thanked 1,803 Times in 1,226 Posts
iTrader Score: 0 reviews
Curious to hear what others are getting for CVI values (from stock guys and guys with tuned/high hp trucks)

'14 6.7 S465 tuned by CTT
'17 6.7 tuned by CTT
'18 6.7 S467.7 tuned by CTT
To view links or images in signatures your post count must be 3 or greater. You currently have 0 posts.
nick00less is offline  
post #10 of 61 (permalink) Old 02-18-2019, 03:28 PM
Diesel Freak
 
Join Date: Feb 2016
Location: North Texas
Posts: 676
Thanks: 39
Thanked 53 Times in 45 Posts
iTrader Score: 0 reviews
I guess I’m gonna have to buy an Android device (gag). This all seems too cool.


Sent from my iPhone using Tapatalk Pro

2012 CCSB Laramie
6.7, 68RFE
EFI Live, Flo Pro/factory exhaust, gauges and Edge Insight.
Mike D Texas is offline  
post #11 of 61 (permalink) Old 02-18-2019, 03:36 PM
Newbie
 
webrats's Avatar
 
Join Date: Feb 2019
Posts: 39
Thanks: 15
Thanked 6 Times in 6 Posts
Garage
iTrader Score: 0 reviews
Quote:
Originally Posted by Mike D Texas View Post
I guess I’m gonna have to buy an Android device (gag). This all seems too cool.


Sent from my iPhone using Tapatalk Pro
Im in the same boat. Please port to ios!

'16 | 3500 | Dually | 4x4| Longhorn | Fox 2.0 | Carli Stuff| Fabtech Lifted 5" 4 link | Efi SWDS | BD throttle thing | Deleted | Speakers/Sub swapped | Amps | Royalty Core stuff | Rigid Lights | Cell Booster | Train BELL | AKA Al Gore | Paid Off
webrats is offline  
post #12 of 61 (permalink) Old 02-18-2019, 03:37 PM
Diesel Head
 
Too Tall's Avatar
 
Join Date: May 2014
Location: Lafayette, La
Posts: 1,930
Thanks: 827
Thanked 428 Times in 308 Posts
iTrader Score: 0 reviews
Very ingenious, thanks for sharing that! Love that stuff

USMC 1968 - 1970. 2014 2500 4 x 4 3.42 maximum Steel
Too Tall is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Dodge Cummins Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Limp Mode, P1222 Error, and WTS Light while driving on a 2006 Cummins 5.9L 06SilverMegaCummins 3rd Gen. Powertrain 0 08-17-2016 02:41 PM
Code 1776 Justincast 07.5 - 09 3rd Gen 6.7L Powertrain 4 07-17-2016 10:51 AM
Use a Dyno to check Engine Health? 20:04:05 3rd Gen. Powertrain 1 03-22-2016 01:21 AM
47RE transmission troubleshooting chart. country_hick 94-98 Powertrain 0 02-25-2013 12:30 PM
blue smoke AGAIN !!!! 2006sigouin 98.5-02 Powertrain 10 12-09-2012 07:00 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome