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Your cart is empty.FITS: 1998-2007 GM transfer case models 136, 146, 246, 261, 261HD, 263HD, 263XHD, 261XHD - IMPORTANT: Install by a Professional is highly recommended - REQUIRED FOR INSTALL: Transfer case needs to be removed and disassembled ---- Here is the best upgrade you can make to your GM transfer case(model 136, 146, 246, 261, 261HD, 263HD, 263XHD, 261XHD). Prevent the ever increasing problem of pump rub. What is "pump rub" The GM transfer cases use a gear pump inside the case that is driven off the mainshaft. The pump forces oil to the planetary as well as the drive sprocket sleeve. Because the pump is driven by the shaft, the housing of the pump must 'float' in the rear housing. There are 5 tabs around the housing that fit into spots in the rear housing to position the pump. Over time, the pump can start to wear on the rear housing. GM installed a spring steel clip in the housing intended to prevent wear but the clip can break and render useless Being that the pump housing is aluminum and is a harder material then the magnesium rear housing, it can wear a hole in the rear housing and cause a very small leak. This leak is high enough in the case that it typically will not leak when vehicle is not moving and therefor not leaving any drops on the ground. Typically the condition is not found until there is transfer case damage from running the case out of fluid. Avoid costly repairs to your transfer case by preventing this condition.
Harlow R.
Reviewed in the United States on March 11, 2024
Great after market part,fits and works better than OEM. - if doing this repair, for ur transfer case, strongly recommend this part.
Scott A. Springer
Reviewed in the United States on March 24, 2023
I installed this into a new Dorman 917-561 rear transfer case housing on a NP246 transfer case in my 2001 Chevy Silverado 2500HD that has a 6.0L gas engine and a 4L80E 4 speed auto trans. It fit perfectly and it is obviously a quality product. It is only ease to install if you have your transfer case apart or out of the vehicle. If you have a 1998-2006 GM truck, your transfer case will fail if you do not have this product.
Taylor H.
Reviewed in the United States on December 24, 2023
This is the one you want!!! Not those flimsy plates that you put behind the pump. This thing works perfect and WILL fix your pump rub issue for the long haul!!! They have other brands of this exact thing but they don’t fit as well as the merchant automotive brand. Spend the extra money and get the quality you need!!!
Josh Truth
Reviewed in the United States on March 31, 2021
Install was straight forward. Hardest part was getting the case apart. Found out about this just in time. My case was 3/4 of the way worn through by the original pump and that was with the clip still installed. Fortunately I was able to get this in before my transfer case was beyond salvage. Could have cost me a whole new transfer case
suitekids
Reviewed in the United States on March 14, 2019
SAFE TO ASSUME, IF YOU ARE LOOKING AT THIS PRODUCT FOR PREVENTATIVE OR THE DAMAGE IS ALREADY DONE TO THE TAIL STOCK ON YOUR TRANSFER CASE, NP261/NP263 , THIS IS THE BEST ON THE MARKET, VERY HIGH QUALITY, PERFECT FIT, PROBLEM SOLVED!!!. THERE SHOULD BE A CLASS ACTION SUIT ON GM FOR THE DESIGN FLAW ON THE PUMP/CASE FITMENT ISSUES. AT LEAST SOMEBODY WITH VISION HAS COME UP WITH THIS REPAIR SO IT CAN NEVER HAPPEN AGAIN. IF I ONLY KNEW ABOUT THIS BEFORE IT WAS TOO LATE, ITS WORTH IT IN THE LONG RUN, HIGHLY RECOMMENDED!!!
Consumer
Reviewed in the United States on February 20, 2019
I did not have as much pump rub as some did. I pulled my NP246 from my 07 Suburban to see if there was an issue because I was (and still am) getting the famous GM clunk. I was hoping there was something in the transfer case that was worn out after 185k. No such luck. While I was in it though I decided to fix a TSB problem with these transfer cases. I replaced the pump housing and slipped it back in. Great quality product and fit perfectly. You either need one or you don't. If you are having symptoms of pump rub (leaking fluid), buy this to correct any future problems after you fix your case housing :)
WUEBBZ007
Reviewed in the United States on November 9, 2018
2004 Silverado z71. Works great it's an easy install. You'll need some wide jaw snap ring pliers, flat head screwdriver, and torq #10 for installation. Im not mechanical savy but did it myself to save money. This adapter has BEEFY tabs on it compared to knife edges of OEM. Gotta junk yard T-case with only 90,000 miles on it and it too was getting pump rub. Get this for peace of mind you won't regret it. First pic is the hole in Tcase.
T.H.
Reviewed in the United States on January 26, 2018
I have a 2003 Silverado 1500HD 4x4 that I have owned since new. It wasn't showing any pump rub leaks but I wanted to get this upgrade before it happened. After youtubing the process, I bought this kit and took it to my mechanic. He said it went right in, came with everything he needed and had no issues. Took about three hours according to him to pull the driveshafts, drop the transfer case, put in the new upgrade and reinstall everything. Seems to be running fine inside the transfer case and now no worries about the dreaded pump rub hole.
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