Company truck just had the transfer case replaced (not impressed by my parts changers- requested a bench rebuild). 170k km they have seen them replaced at 50k km. I treat the truck as my own- wondering what the story is on these, this one has clutches and the auto function which I do not use although I do use 4x4 alot in the winter and on gravel roads. Do not know the case model- I understand there were three different models, my old NP241 got a chain and bearings thrown at it due to the 700r being out for a rebuild on my personal truck.
2019 Silverado transfer case life.
- Thread starter dfarr67
- Start date
Many people abuse the property of others.
Maybe your extra level of care helps a weak design last longer.
I'm gonna be near zero help but I found this allegedly starting in '19, which I didn't know:
"So I was told today by a GM rep that all Z-71's and Trail Boss trucks will have the two speed transfer cases. All others will have a single speed transfer case with a 4wd low "mode" that uses brakes and holding transmission gear and what not to "simulate' 4wd low"
Being an avid 'wheeler, I am not a fan of trying to use brakes as a substitute for gear reduction (or fakey diff lockers, but that's another thread). It's all kinda like imitation crab: seems acceptable at first, but then, NOOOOO!
Anyway, would be good to know if you have a single speed or true 2-speed t-case.
"So I was told today by a GM rep that all Z-71's and Trail Boss trucks will have the two speed transfer cases. All others will have a single speed transfer case with a 4wd low "mode" that uses brakes and holding transmission gear and what not to "simulate' 4wd low"
Being an avid 'wheeler, I am not a fan of trying to use brakes as a substitute for gear reduction (or fakey diff lockers, but that's another thread). It's all kinda like imitation crab: seems acceptable at first, but then, NOOOOO!
Anyway, would be good to know if you have a single speed or true 2-speed t-case.
Firstly, the transfer case is a Magna Powertrain (MP) transfer case. Magna got the contract around 2008. Here is some info on them:
There was a mention of a single speed transfer case. Here it is. Can you look at your glove compartment door and look for the transfer case code?
Look for the RPO code in the chart above.
Look for the RPO code in the chart above.
No idea where the option codes are located- not in the glove box. Is there a fundamental problem with these cases, I understand the floor shift manual type is desirable.
My RPO codes are in the upper glove box.
The QR code looks smudged in the photo. If it’s more clear in person, try scan it with QR scanner.
My Caddy is a 2019 and its a QR code on the driver door pillar. I am assuming that may be the same for your vehicle since they are both GM.
edit, looks like snagglefoot and i were posting at same time
The RPO code for the 3010 is NPO. This transfer case made a lot of sense for folks who wanted an automatic four wheel drive system but didn’t need a wannabe rock crawling system.
From the pic, looks like yours is the 2019 K2 flavor, not the 2019 T1xx (I have the '19 K2, myself). There's no inherent problems with those t-cases. And there hasn't been a manual shift option for quite some time, at least not from GM.
I see from your year-old other thread fluid changes on this unit have been.....questionable?
I see from your year-old other thread fluid changes on this unit have been.....questionable?
You'll have to link that- but maybe the fleet co is deserving this as I seem to have to insist on certain oil changes (trans, diffs). I don't recall the tansfer case ever being changed.
Here is some info on Magna Transfer cases GM used, starting in 2008. I also included the big dog, the MP1626 XHD, hohoho.
MP transfer cases take Dex VI. I have a MP 3024, which used to be the big dog behind a 6.0 gas engine. It was the first ones out and the mechanics recommended Auto-Trak II fluid because of the clutches, even though that was really for the previous NP series of auto transfer cases. It’s nickname is Smurf Fluid because it’s blue in color. I’ve been using it for 16 years and the transfer case has over 250,000 miles. I find my fluid takes about two years and 20,000 miles to start looking black, using the four wheel drive a lot in the winter. I try to change it every two years.
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Here is the 2024 3/4 ton manual recommendations. 50,000 miles for normal service and 25,000 miles for severe service. Basically, the transfer case required fluid changes twice as frequently as transmission fluid changes. MP transfer cases use a huge chain to transfer the torque. It’s common to have steel shreds on the magnetic drain plug.
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Here is what I found on the drain plug on my MP 3024. This plug needs to be cleaned at every fluid change. There were also very fine particles in the fluid that caused the fluid to take a shape along the magnetic flux. The same cleaned up plug is in the bottom photo.
New Process=New Venture=Magna Powertrain.
