let lastScrollPosition = 0;
const headerWrapper = document.querySelector('#header-wrapper'); // Changed selector
const scrollThreshold = 100;

function getTranslateValue() {
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}

window.addEventListener('scroll', () => {
    const currentScrollPosition = window.pageYOffset || document.documentElement.scrollTop;
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        // Scrolling down
        if (currentScrollPosition > lastScrollPosition) {
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        // Scrolling up
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// Handle resize events
window.addEventListener('resize', () => {
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    }
});

Updates to the Transfer Case:
• Adapt-A-Case BRNY Case Saver
Accelerated wear of magnesium transfer case housings has been documented anytime internal parts move against the magnesium. This is especially evident in New Venture/New Process 136, 149, 236, 246, 261 and 263 transfer cases. The sharp edges of the aluminum pump locating tabs cut through the soft magnesium, or other times the sharp edges of the OE U-shaped insert wear a larger area above the pump tabs. A small amount of movement of the pump is necessary to keep the pump centered on the output shaft. Any metal in contact with the magnesium causes rapid fretting wear of the soft magnesium, resulting in pinhole leaks. Adapt-A-Case BRNY transfer case pump plate kit eliminates these contact issues and helps distribute the contact area of the pump to the magnesium casing and eliminating the U-shaped steel insert.

This transmission comes with a 1 Year 36,000 Mile Warranty with the purchase of a new torque converter. We offer an extended Warranty 2 Year 50,000 Mile Warranty, or a 3 Year 100,000 Mile Warranty for an additional charge.

Any and all shipping costs, including freight damage claims. Rental cars, loss of work, any labor costs, removal/reinstall fees, towing costs, inspection fees and any other incidental costs or damages which may be associated with product failure. Any product that has been physically altered, improperly installed or maintained. Any product used in an improper application, abused or not used in connection with the proper parts.

Buyer is required to pay the core deposit up front. Core must NOT have any internal hard part, or case damage, otherwise there will be additional charges deducted from your core deposit for the damaged hard part(s) or case. Initial shipping cost only covers one-way shipping. Return shipping cost for the transmission core is not included. Return shipping cost is deducted from your core deposit refund, after returned core passes inspection.

Majority of units are in stock, in the unlikely case we do not have one in stock, they are quickly available, in most cases, as little as one business day. There are many different variations of this transmission model available so please make sure we get a VIN number when or after you place the order.

NP263XHD 1999-2006 Re-manufactured Transfer Case

Our Process:
All of our transmissions are fully remanufactured and are held to the highest and strictest industry standards. What this means to you is the fact you are getting a quality product that meets or exceeds the OEM standards, not just a part that is taken apart and “patched”. We ensure that all the current updates are performed, during reassembly each unit is ran through tests to ensure correct assembly and quality

Remanufactured GM NP263XHD Transfer Case Assembly, for use behind the Allison transmissionApplications: 1999-06 6.6L

Information about the Transfer Case
Parts List:
• All New Gaskets, Seals Metal Clad Seals, Seals
• New Borg Warner Chain
• New High Quality Bearing Kit
• 3 piece synchronizers
• New Patented Adapt-A-Case BRNY Case Saver
• New Pump

Buyer is required to swap a core for this trans otherwise there will be a core charge in addition to the above price.

Does Not Include Encoder Shift Motor, It is highly recommended to change the Encoder Motor when you replace the transfer case, we have them available for a additional charge

Fluid Recommendations are Auto Track II (GM ONLY) or Dexron VI

Have a Questions?
(815) 935-2356
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What Our Customers Say

Don't just take our word for it. Hear from fellow DIYers and mechanics who've experienced the Shift Rite difference. Our customers consistently praise our quality products, expert advice, and outstanding service. See why so many trust us for their transmission needs.
Christian Davis
I purchased a 48RE Transmission from ShiftRite! It arrived quickly, installed it, and I was back on the road! So far all is well! The communication was outstanding and the people at ShiftRite really take care of their customers! Thanks!
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Lisa Sewell
As a first time customer, I was extremely pleased with how efficient and professional this company is. I had the pleasure of dealing with Molly who was very knowledgeable and pleasant. Molly was timely with returning calls/text messages. She is a great asset to the company. I would highly recommend their services if needed. Lisa Sewell
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John Parks
If you have any doubt about purchasing your transmission from Shiftrite put it to the side . I can promise you they stand on their work because it’s top shelf and the small chance they do make a mistake they will rectify it I assure you . In my case the mistake was on my end Bret still helped me resolve the problem . Thanks again Bret and the team at ShiftRite . I appreciate it !
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Raymond Noblin
The owner was very involved with my 4l80e swap. Had an internal harness connector o-ring leak they helped me resolve to prevent fluid from leaching up into the main input harness. After that the trans performed flawlessly. Great communications and shipping crate professionally done. I will use them again I am sure. I would proudly wear a shirt or hat with their logo. Thanks team.
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Ginger Duke
Needed a transmission for my dodge 5500. They shipped it quickly to my mechanic then let me bring the core in since I was going to be in the area, so I didn’t have to spend a bunch on shipping to get my core deposit back! Molly is the best to deal with! Can’t go wrong with them!
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