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NP 261 Transfer Case help

regcab02HD

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regcab02HD Enthusiast

regcab02HD

Posted
Posted

What has to be done to split a NP 261? I have a leak where the 2 halves join together. I pulled the t-case and removed all the bolts. But I can only split it about 1/2 inch. Is there something else I need to do to get it apart? Or just pull harder?

Thanks

regcab02HD Enthusiast

regcab02HD

Posted
  • Author
Posted

Well, I got the transfer case apart today and found out the leak wasn't coming from between the 2 halves. There was a hole worn in the case from the oil pump. I only have 75,000 miles on the pickup and thought this was premature. So I went to the dealer and they told me there was no TSB or recalls. So basically, I'm SOL.

Has anyone else had this problem? I found this on ebay while looking for a new rear case. NP 261 It talks about the same problem I have.

If you have over 50,000 miles I would start looking for an oil leak from the transfer case. It would be cheaper to buy a rear half than the whole transfer case. BTY, the dealer told me the rear case would be about $350. Does this sound right?

  • 3 years later...
Randy Andersen New Member

Randy Andersen

Posted
Posted
http://www.gm-trucks.com/forums/index.php?showtopic=59200

 

Here's another link from just a few weeks ago...

 

 

Google search Merchant Automotive. They have new rear halves and an upgrade kit for just this problem--the pump housing is rubbing a hole due to a poor design. Don't weld the spot where it leaked--Merchant won't warranty his part should their be a failure on a fixed case.

 

By the way, I assume you figured out that you need a set of heavy duty snap ring pliers if you got the case off. Merchant Automotive also has instructions on how to do their upgrade kit.

donniecfd32 Enthusiast

donniecfd32

Posted
Posted

I just did the upgrade with the M/A kit last weekend. It wasn't bad at all. It took about 3 hours to do. The instructions are straight forward and easy to understand. I replaced the O-ring while I was in there and if you are going to go with M/As new rear housing you will also need a new driveshaft seal. The whole thing was about $500, but it sure beats having a dealer do it and/or puking your T/C.

BrockwayMT Enthusiast

BrockwayMT

Posted
Posted

another one stopped by the houdini ring. Glad you figured out how to get it apart. There are only about 10,000 out there with the pump rub problem.

jro909 Senior Enthusiast

jro909

Posted
Posted

how olds the transfer case? my local dealership replaces alot of transfer cases for the rub problem with no questions asked

Randy Andersen New Member

Randy Andersen

Posted
Posted

I did the Merchant Automotive upgrade in my truck. There was some wear. The rattle clip was still there, but it was no longer attached at the tab anymore. A buddy's dad has an 03' 2500 Suburban who actually had a hole in his transfer case at 100K. I have heard of it happen as early as 40K. The transfer case metal is somewhat soft---don't drop the transfer case, it will split like and egg.

 

Here's another good link of a TV show that talks about this upgrade:

 

 

Riverjet502 Enthusiast

Riverjet502

Posted
Posted

Dump Question time...

Is this problem more common with the push button servo operated transfer case's and not so much with the manual lever operated NP261's??? Or maybe it's just my little world I live in that the folks who have seen this problem had the servo operated T-case? Just curious now is all...

BrockwayMT Enthusiast

BrockwayMT

Posted
Posted
Dump Question time...

Is this problem more common with the push button servo operated transfer case's and not so much with the manual lever operated NP261's??? Or maybe it's just my little world I live in that the folks who have seen this problem had the servo operated T-case? Just curious now is all...

 

There are just more electric shift units out there.

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