Who has installed a NP263 case saver thingy

[Armand]

I just got mine from ebay, has anyone installed one of these? The directions that came with it are pretty piss poor and it has one crappy pic. It looks easy enough, drop the rear shaft, pull off the case half, install where the pump sits into the case. Just wondering if anyone had some good pics or if there was anything I should look out for. Thanks!

[locrwln]

Here is mine. Not a step by step, but should give you some idea.

Got the last of the known "weak" links fixed on the Chevy today. GM's are known for the infamous "pump rub," which is when the oil pump ends up rubbing a hole in the rear portion of the transfer case. It of course leaks all of the fluid out and will destroy the t-case when it does (if not caught in time). Merchant Automotive makes a kit that replaces the factory oil pump housing which a much improved version that prevents the oil pump from rubbing through the housing. I figured since I was going to have the t-case out, I might as well add the t-case brace that MA sells. The brace mounts on top of the t-case and to the rear of the Allison. The rear housing of the Allison has been known to break when the truck is used aggressively offroad, while not extremely common, it can happen.

T-case on the work bench.




The little clip that eventually breaks and where the "rub through" occurs.


The rear portion of the case removed.


MA oil pump housing on the left and stock on the right. As you can see, the stock housing is shaped like a knife while the MA is much wider and every tab is like that.


New oil pump housing assembled and ready to back in the t-case.


Got t-case back in and everything buttoned up. Good news is that everything worked, all ranges engaged and dis-engaged correctly.

Jack

[Armand]

What I got was just a plate that looks like it goes in first before pump and protects every indent where the pump sits in the housing. Just like that clip that breaks but a much beefier setup. the pics of the case apart deff helps tho thanks.

[BIG-O]

The merchant automotive one is the way to go.

[Armand]

Well I wasnt aware it existed haha

[BIG-O]

Fair enough. I always do a ton of research before buying stuff. Just cause I'm not rich.

[grn73toy]

mine kit is hear just waiting for a free saturday to do it. my question is ,do you need to drain the transmission or don't you loose that much fluid out the back of the tranny.

[Armand]

Originally Posted by BIG-O

Fair enough. I always do a ton of research before buying stuff. Just cause I'm not rich.

The plate was recommended to me from people here..on pirate haha

[Armand]

Originally Posted by grn73toy

mine kit is hear just waiting for a free saturday to do it. my question is ,do you need to drain the transmission or don't you loose that much fluid out the back of the tranny.

Pretty sure you can just pull the first case half off under the truck, I believe the transfer case only has like 1 1/2 to 2 quarts in it.

[locrwln]

Originally Posted by grn73toy

mine kit is hear just waiting for a free saturday to do it. my question is ,do you need to drain the transmission or don't you loose that much fluid out the back of the tranny.

Nope, no need to drain the tranny. Just be careful with the t-case as it is bulky and awkward to deal with if you are doing it without a lift (like I did) and there is barely enough room to squeeze it in and out of place.

Jack