2020 transfer case clunk - Chevy and GMC Duramax Diesel Forum
2020+ GM T1 Platform Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

 
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 12-11-2019, 09:04 AM Thread Starter
Duramax Lifetime Supporter
 
Join Date: Oct 2014
Location: Weatherford Texas on a 25 acre horse farm
Posts: 233
2020 transfer case clunk

Just read this on GM TechLink. Apparently trucks with the NQF or NQH transfer case can have a clunking sound during coast down. It requires the mounting bolts be loosened and the case backed up no more than an inch and a specific re torquing of mounting bolts.
All the info is on the website dated 11/20/19.

2019 Chevrolet 4500HD CC 4X4 Flatbed
2018 Chevrolet 1500 CC 4X4 High Country 6.2 liter
2019 Chevrolet 3500HD CC 4X4 Flatbed--SOLD
2011 Peterbilt 337 hauler with 360HP 8.3 Cummins--SOLD
1957 GMC 1 ton flatbed with 22K original miles.
3 different Kubotas
2003 Chevrolet 2500HD CC: 2011 Chevrolet 3500HD CC 4X4 and 2013 3500HD ex. cab 4X4-- all sold.
sambor is online now  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 12-18-2019, 12:18 PM
Junior Member
 
Join Date: Oct 2008
Location: Woodland, CA
Posts: 44
Quote:
Originally Posted by sambor View Post
Just read this on GM TechLink. Apparently trucks with the NQF or NQH transfer case can have a clunking sound during coast down. It requires the mounting bolts be loosened and the case backed up no more than an inch and a specific re torquing of mounting bolts.
All the info is on the website dated 11/20/19.
From what I understand, it was a few early built trucks and the noise will be obvious when you drive the truck. If you haven't noticed it in the first couple weeks of ownership than your truck is not likely effected by it.
RichieRichZ06 is offline  
post #3 of 3 (permalink) Old 12-18-2019, 01:01 PM
Junior Member
 
sdelam's Avatar
 
Join Date: Aug 2019
Location: Ohio
Posts: 52
Garage
I had this done to mine, purchased in July and they wouldn't release it to me until it was done. Dealer said they were replaceing the bolts though not just remove/re-torque. Havent had any issues with clunking other than a few hard shifts during the transmission learning period.

2020 Denali 2500 Duramax Crewcab 4x4
sdelam is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevy and GMC Duramax 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



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