G56 Dual Disc with Mobil Delvac 50 - Before and After Comparison

I recently put a Valair organic dual disc clutch in my 2017 Cummins. Even though it’s the quiet model (QG56DDSN-ORG) there was still a lot of gear rollover noise. A common solution is ditching the stock ATF+4 and replacing it with 7 quarts of Mobil Delvac 50, which is what Mercedes recommends for these transmissions. This was a huge improvement! The Delvac is expensive, but worth every penny.
Sorry for the shaky test drive video, my 9 year old was filming that part!
Best place to get Delvac 50: www.summitraci...

[@snyderkurtis]

I went south bend organic/ceramic and delvac 50. I’ve heard rollover like once. It’s a must do even with stock clutch this fluids great

[@gagepuffinbarger6939]

I've heard it's more of a single mass flywheel characteristic

[@danspencer4181]

Just bought this same clutch tonight! Can’t wait to install it! Definitely going to add the Mobil delvac in it as well! How long did it take you to install the clutch?

[@vtdeezl]

Dan Spencer I had a shop do the clutch for me so I’m not sure on the install time.

[@danspencer4181]

Thanks VTDeezl. Thanks for adding the link for the mobile delvac. That’s by far the cheapest I’ve seen!

[@ryan2546]

How’d she sound when she warmed up, my South Bend is dead quiet cold but once the royal purple warms up faint chatter comes back can’t hear it over the fan blowing tho

[@vtdeezl]

I definitely get a little chatter back when it’s warmed up, but it’s tolerable. Nothing like it was with the stock ATF. Once I park and let it idle for a minute it goes away.

[@tomascorrea6800]

My 2008 Dodge Ram diesel the manuel transmission is very noisy in neutral

[@jtcusa7288]

Are you daily driving this beast?

[@erk409]

How does it shift in cold weather with this fluid?

[@DPats1228]

From my experience with my 06 you had to let the truck warm up for at least 10 minutes in the winter or it would stick very badly in gear

[@PAKNVNM]

Are you still running the Delvac 50? If so, How’s the transmission shifting? I just switched to 7 qts Delvac 50 and is fine when warm, but very notchy when truck is cold. I don’t really mind the cold shifting issue, Just want to make sure I am not damaging synchros. Thanks for video and feedback! We have twin trucks and similar mods 🍻

[@vtdeezl]

PAKNVNM I don’t have this truck anymore unfortunately, but I did run the delvac until I traded it. It got a little stiff in cold weather but it always loosened up after a couple miles.

[@PAKNVNM]

VTDeezl thanks for the reply! Ill continue to run the Delvac. Sorry you don’t have the truck anymore, too bad Ram killed the stick this year.

[@BoogerSugarOffYourMothersAss]

Hey bud I am using Hot Shot’s unreleased G56 fluid and am still experiencing notchy shifting when cold. Running 7 QT too. Just for reference it is not limited to this particular fluid

[@PAKNVNM]

@@BoogerSugarOffYourMothersAss Good to know. I switched the Delvac a few moths ago to RP Synchromax, 7 qts and she shifts like a dream.

[@davidanderson8469]

Amsoil 75-90 MTG is slick and shifts easier then Delvac50.

[@powerram92]

Did you out delvac 50 in the transfer case too or did you put a different fluid in there

[@gagepuffinbarger6939]

A bit late, but when i got my NV271 Tcase, it said to use something like 10w30 engine oil.

[@SweetSc00b99]

How’s that clutch for daily driving? Can you start in second is it jumpy at all?

[@vtdeezl]

Dre it can be a little jumpy in second and reverse, but I’ve learned to pull out with a little more throttle. You can’t slip into it as easy as the stock clutch. Now that it’s broken in and I’ve gotten used to it, it’s not bad at all.

[@Stopher300WM]

How’s the shifting in cold temps?

[@johnathansanchez7831]

You don’t film vids any more ???