Jump to content

Transfer case fluid change

Jeff Newell
 Share

Recommended Posts

Jeff Newell New Member

Jeff Newell

Posted
Posted

I have a 17 Silverado 1500 z71 that I bought used with 89k miles on it. Around 93k or so, the transmission had to be replaced. It now has almost 100k on it. I know the transfer case fluid is supposed to be changed around this time. 

 

My question is, what are the odds that they changed the transfer case fluid when they replaced the transmission? Or would it not be standard procedure to drop both at the same time. I've searched and have seen mixed opinions. The paperwork did not specify if it was done or not. 

diyer2 Senior Enthusiast

diyer2

Posted
Posted

Well,

I think if the trans had been serviced BEFORE the owners manual recommends(I do more fluid changes) you wouldn't have needed to replace it. So I bet the transfer case was never touched.

Jeff Newell New Member

Jeff Newell

Posted
  • Author
Posted

I agree as far as the trans goes. It was a risk of buying a used vehicle. Fortunately I had an extended warranty that covered it, otherwise I would have been real upset. 

 

Just trying to stay up to date with the maintenance now since I can only assume it wasn't fully taken care of before I bought it. 

rav3 Senior Enthusiast

rav3

Posted
Posted

If it were me, I'd go ahead & change it as it only holds about a quart or 2. Easy job.

  • Like 1
Z45 Senior Enthusiast

Z45

Posted
Posted (edited)

I would change it out. I would never trust the shop to be proactive, they likely did only what was necessary and used the lowest cost products in their repair. If you are of the believe all lubes are the same, then drive with confidence. 

Edited by elcamino
newdude Senior Enthusiast

newdude

Posted
Posted
On 7/17/2023 at 1:57 PM, Jeff Newell said:

I have a 17 Silverado 1500 z71 that I bought used with 89k miles on it. Around 93k or so, the transmission had to be replaced. It now has almost 100k on it. I know the transfer case fluid is supposed to be changed around this time. 

 

My question is, what are the odds that they changed the transfer case fluid when they replaced the transmission? Or would it not be standard procedure to drop both at the same time. I've searched and have seen mixed opinions. The paperwork did not specify if it was done or not. 

 

 

Unlikely.  Transfer case was probably removed with the fluid in it.  Its only 2 quarts in there so not a whole lot of extra weight.  

 

No more than ever 45k miles IMO for transfer case.  The book shows 97,500mi for "normal use" which is insane because the 2500/3500 chart shows every 45,000mi or for severe use every 22,500mi.  

  • Like 3
Jeff Newell New Member

Jeff Newell

Posted
  • Author
Posted

Yeah. Definitely going to change it. Just hoping no damage has been done. No idea how well it was maintained before I bought it. 

BigBlue2014 Enthusiast

BigBlue2014

Posted
Posted

For good measure, I would suggest replacing Front and rear diff as well as the transfer case. You will already be under the truck with the tools out, so what is an extra 30-45 min of time to have fresh fluid in everything?

  • Like 4
  • Thanks 1
Wyatt1963 Enthusiast

Wyatt1963

Posted
Posted

What’s the best fluid for front, rear differential and for transfer case? For 2015 Sierra 4x4

weight, brand etc..

I don’t get under the truck anymore so what’s a fair shop price for all?

thanks in advance 

rav3 Senior Enthusiast

rav3

Posted
Posted

I use a synthetic 75W90 limited slip GL5 gear oil in front & rear.  Walmart Super tech works & is a good cost effective  GL5.

Transfer case takes Dexron 6. I use AC Delco  for it but any Dexron 6 meets the spec.

  • Like 1
  • Thanks 1
HoosierZ Enthusiast

HoosierZ

Posted
Posted

I used Mobil 1 Delvac 75W90 in my diffs because it doesn’t contain limited slip additive. The additive isn’t recommended for the G80 locker. It took 4qts 12oz for both diffs. 
 

B1ABF76B-EA38-4C0A-93CB-5F44EF90C147.webp.09a714491c9d0182df317c0ceb4656f5.webp

  • Like 2
  • Thanks 1
BigBlue2014 Enthusiast

BigBlue2014

Posted
Posted
On 7/21/2023 at 7:11 PM, Wyatt1963 said:

What’s the best fluid for front, rear differential and for transfer case? For 2015 Sierra 4x4

weight, brand etc..

I don’t get under the truck anymore so what’s a fair shop price for all?

thanks in advance 

I used Amsoil Severe Gear 75W90 for the Front and rear Diffs in my 2014 and Amsoil Synthetic Trans oil for the transfer case.

  • Like 1
reardiff Enthusiast

reardiff

Posted
Posted
5 hours ago, BigBlue2014 said:

I used Amsoil Severe Gear 75W90 for the Front and rear Diffs in my 2014 and Amsoil Synthetic Trans oil for the transfer case.

 

Same here

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • Grumpy Bear
      The Peckish Synapse

      By Grumpy Bear · Posted

      Breaking News!    I'm going to tell you that I'm going to tell you.  Then I'm going to tell you what I'm going to tell you.  Then I'm going to tell you.  Then I'm going to tell you what I told  you.  Then I'm going to tell you what I'm about to tell you on the other side of the break.  Then we're going to break. Then I'm not going to tell you what I told you I was going to tell you.  But I'll tell you something else that is Breaking News just coming to the desk that everyone reported on yesterday.  Then I'll tease a human interest telling I'll get to on the other side of a larger break. Then I'll tell you one item in 20 seconds and go back to an even longer break. Longest break of the night.  Then I'll tell you a fluff piece that takes 10 seconds and sign off into a three minute break while you wait for the next 30 minutes of rinse and repeat on the local news.    In al you'll get about 12 minutes of something, 5 minutes of which is worth hearing in a 30 minute show and 18 minutes of advertising at a sound level twice as loud as the news.    Of course you can switch to cable news and hear 12 different people tell the same four stories in much the same format as the Network News for 20 hours of which the majority will be advertising.  And four hours of late night Specials about things you wonder why you stayed up to listen to. Half of which will be repeats.....   OR you can go for a drive  
    • Afennell19
      Audio Dampening and quiet

      By Afennell19 · Posted

      Did you ever figure this out? My 2022 Trail Boss, and now my 2026 LT did this from time to time.  I believe it was more connected to Android Auto and my phone being the cause. Maybe try going for a drive, sans cell phone.... and see if it happens? 
    • Afennell19
      2026 Sierra 1500 Denali - Sound upgrade?

      By Afennell19 · Posted

      I have a 2026 Silverado LT, the non bose as well.  Upgrading the door speakers is pretty straightforward. You could honestly go to walmart, or Auto Zone/ O Reilly and get a set of 6x9s for the front, and 6.5s for the rear. You do also have to get some adapters for each, but they are like $10 a pair on Amazon. Then some plug and play harnesses that are about $10 a pair on Amazon as well.  And I would also suggest a 10 pack of the Amazon Basics sound deadening. Slap that all around the speakers and on the open metal of the inside of the door. And your golden.   I am currently doing this with my Silverado. Although I am having a bit of trouble because I am snooby I guess and bought some Alpine S2 S69c's which are 2 way components and I am having to wire from the door up to the dash....  Having never installed speakers before, its taking me just a bit to get everything correct. But if you dont buy expensive component speakers, and just some $40-$50 door speakers. You will DRASTICALLY improve the sound over these stock paper cone junk speakers. I thought my Silverado had an issue with the radio/ sound for a while.  Come to find out.  The stock speakers are just THAT SH*TTY   I cannot wait to have some decent sound in the truck   What did you end up doing?
    • newdude
      Parking Brake - Automatic Engagement Questions

      By newdude · Posted

      Its all automatic based on yaw sensor data.  If enough incline is detected, it engages.   My recommendation though would be to disengage it before driving off and not let it auto disengage by touching the gas pedal.  The HD trucks use the same setup as prior years, the drum in hat park brake.  But now with an electric actuator.  If you drive off repeatedly over time, it can torque the park brake shoes and can also prematurely wear them out.           Electric console shift will set the park brake on flat ground too.  Pretty sure they've got it programmed to activate every time.  
    • riddler
      Supercharger (whipple)

      By riddler · Posted

      Anyone install a a supercharger on your 6.6L L8T? Talk to me...

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...