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02-24-2014, 04:26 PM
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#1
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Junior Member
Join Date: Jan 2014
Location: NEOH
Posts: 10
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GM transfer case 'Pump Rub'?????
I just learned about this dreaded condition today....barely 4 weeks after buying a 2002 Tahoe 4X4 with 93k miles as a TV.
Anyone know of it? Dealt with it? Prevented it?
It shouldn't be this hard....LOL.
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02-24-2014, 04:31 PM
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#2
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Senior Member
Join Date: Jun 2013
Location: Kentucky
Posts: 264
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Common problem for the pump cover spring/tab to break off and then it rocks back and forth till it wears a hole in the case. You've got two choices, replace the rear housing and install new OE parts inside or replace the housing and install Merchant Automotive pump rub kit and never worry again. Just goggle merchant automotive pump rub kit and you'll find the link to buy it.
2005 Silverado 2500HD D/A
2013 Laredo 321BH
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2012 GMC Sierra 3500HD D/A 4x4
2013 Keystone Laredo 321BH
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03-01-2014, 05:36 AM
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#3
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Junior Member
Join Date: Jan 2014
Location: lisbon falls maine
Posts: 7
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Just as quad said. I had a 01 duramax, the hole was about the size of a pencil lead. It happens on the PS side of t case about half way up. I used the merchant kit, I was too cheap to buy a new back half so I used jb weld. Drove the truck for 30,000 miles with no issues.
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TV. 2001 ram 3500 Drw. Cclb. Few mods
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04-13-2014, 12:46 PM
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#4
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Senior Member
Join Date: Sep 2013
Location: Essexville, MI
Posts: 262
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to do the case half method you will have around $600 in parts
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2014 Passport Elite 31RE
2017 2500HD Crew Cab
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04-13-2014, 12:53 PM
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#5
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Senior Member
Join Date: May 2012
Location: southern indiana
Posts: 292
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how common is this problem?
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04-13-2014, 01:01 PM
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#6
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Senior Member
Join Date: Sep 2013
Location: Essexville, MI
Posts: 262
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Wife had it around 100k on her Tahoe.
I haven't seen it yet on my Avalanche, I have 136K now.
I work at a GM dealership, we don't see it too often.
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2014 Passport Elite 31RE
2017 2500HD Crew Cab
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04-13-2014, 01:11 PM
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#7
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Senior Member
Join Date: May 2012
Location: southern indiana
Posts: 292
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I have 73,000 on my duramax, I guess I will cross my fingers too.
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04-13-2014, 03:12 PM
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#8
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Junior Member
Join Date: Jan 2011
Posts: 2
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My 06 Duramax has 93K and I had installed the Merchant repair kit. The steel OEM clip was just worn thru and rub had started on the case. Well timed preventative maintenance.
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2011 Laredo 265rl
2006 Chev 2500HD, 6.6L, D/A, 4X4, LB
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04-13-2014, 03:19 PM
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#9
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Senior Member
Join Date: Mar 2014
Location: Las Cruces
Posts: 4,665
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There is also a brace available that provides more support. I read somewhere that excessive torque on the housing causing it to shift adds to the problem or cracks the housing. Not really sure if the two problems are related or not, but they make the aftermarket brace for a reason.
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Brent
2013 Alpine 3500RE
2019 Silverado 2500HD Duramax
U.S. Air Force Retired (25 yrs)
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04-13-2014, 03:42 PM
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#10
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Senior Member
Join Date: Apr 2012
Location: KY
Posts: 386
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Yes its due to vibration, you should also have your u joints replaced and drive shaft balanced. Just went through it. The next thing that can happen is the adapter between the transmission and the transfer case can crack due to vibration. I have merchant kit and the merchant brace. If you have a duramax then merchant automotive is a great resource.
Sent from my EVO using Tapatalk
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04-14-2014, 02:01 PM
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#11
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Member
Join Date: Mar 2013
Location: Belvidere, IL
Posts: 36
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2nd the Merchant kit. I pulled the case in my 06 Duramax after part of the clip came out when draining the fluid. The case was ok so I caught it just in time at 83,000 miles. The Merchant kit is top quality and about $75. This issue applies to all the GM 4x4's from about 88-07 if I remember correctly. Out of 4 trucks i've owned in that time frame only the 06 had an issue but I didn't look for it in the others.
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2012 Laredo 294RKS
2006 Chevy Silverado 2500 HD Duramax Crew Cab LB
Equal-I-Zer 14K
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04-14-2014, 03:57 PM
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#12
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Senior Member
Join Date: May 2012
Location: southern indiana
Posts: 292
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I saw a video or a step by step diy on the duramax forum or somewhere..
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