Marlin Crawler - Exploring our new MC07 XD Dual Case Technology
We redesigned our Dual Case Adapters last year with our new line of Xtreme Duty adapter plates. I never got this posted here, so here goes!!
Exploring the New MC07 XD Technology To compliment our Xtreme Duty 4.70:1 Gear Set, Marlin Crawler is proud to release the long anticipated Xtreme Duty Dual Case Adapter Kit. The Xtreme Duty 4.70:1 turned the Low Range gear world up-side-down, and now it is time for the world's #1 most popular dual case adapter kit to do the same. Originally created in 1994, the Marlin Crawler Dual Case Adapter has come a long way since its introduction as the MC01. Please take a moment to explore the technology behind the most advanced Dual Case Adapter in the world... http://www.marlincrawler.com/sites/a...d_overview.jpg Features
http://www.marlincrawler.com/sites/a...ubleroller.jpg The key ingredient in the reliability and longevity of the dual case adapter is how the coupler is supported. Knowing this important fact, Marlin incorporated a large, double roller bearing into his first dual case adapter in 1994. The manufacturer at the time refused to use such a large bearing instead opting for a cheap, in-house part. Finally in 1997, Marlin had enough stripped out couplers to finally convince his manufacturer to use a double roller bearing. This was a critical turning point in the dual case adapter world. The double roller bearing has been proven to be over 100 times more reliable than a single roller bearing. The double roller bearing is so successful in fact, that it is used in our MC08, MC09, MC10, MC11, and MC12 dual case adapters.
http://www.marlincrawler.com/sites/a...llsthanyou.gif 2. Chromoly Coupler http://www.marlincrawler.com/sites/a...ycouplerTs.jpg You read that right: The XD MC07 Crawler comes with a Chromoly Coupler. This is Xtreme Duty, this is Marlin Crawler.
3. Oversized Heavy Duty Cage Bearing http://www.marlincrawler.com/sites/a...gebearing4.jpg This is another Marlin Crawler Xtreme Duty exclusive feature. We have seen some lower cage bearings overheat in extreme conditions, such as heavy trail breaking in deep snow or mud. You might think the snow would keep the case cooler, but what happens is the snow melts around the drivetrain and then freezes into ice creating an insulating layer around the transfer cases. This prevents any air flow around the cases and, in turn, the gear oil temperature begins to rise. The Xtreme Duty Crawlers feature this MASSIVE lower cage bearing to combat this issue.
4. Radiused Coupler for increased pocket bearing oiling http://www.marlincrawler.com/sites/a...ouplerdish.jpg The input pocket bearing is housed within the coupler. Because this pocket bearing is above the gear oil fill level, it is important to get the right amount of oil to the pocket bearing. Our 4.70:1 Xtreme Duty low speed gear does features an innovative oil pump system, however 4.70:1 gears are generally not used in a Crawl Box. For this reason, we have designed our Xtreme Duty coupler to encourage oil flow through the pocket bearing while at the same time trimming off fat.
5. Heavy Duty Plate Webbing http://www.marlincrawler.com/sites/a...xd_webbing.jpg The Xtreme Duty adapter plate lives up to it's name with full flange webbing. The previous designs stopped short of each flange, but not the Xtreme Duty design.
6. Thrust Washer Lock System http://www.marlincrawler.com/sites/a...plerdetent.jpg Please imprint these words into your brain: Every Toyota thrust-washer has a detent ball lock system. Period. Every main shaft in every transmission Toyota has ever built has a locked thrust washer-to-shaft system: All L-series, all G-series, all W-series, all R-series. Additionally, every transfer case they have made uses a thrust washer-to-shaft lock system including all 4-cylinder and 4-cylinder Turbo gear drive cases, and all chain drive cases including those found in Tacomas, 4Runners, T100s, FJ-Cruisers, and Tundras. Heat treated same-metals should NEVER be allowed to wear against one another.
7. Shelf Oil Passages http://www.marlincrawler.com/sites/a...xd_shelves.jpg Our adapter plates are designed with 6 oil passages between the transfer case and the Crawl Box. The upper two oil passages are above the oil fill level so only turbulent oil is able to transfer through these passages. Because of this, we've designed our Xtreme Duty Crawler plates to include shelves to "catch" and drain this oil right into the upper oil passages. Our previous design lacked shelves and therefore relied on vehicle acceleration in order for gear oil to pass beyond the main bearing. Unlike other adapters, the Xtreme Duty adapter transfers oil under cruising conditions. This never before seen feature is only available with a Marlin Crawler.
8. Multi-bolt Retention System http://www.marlincrawler.com/sites/a...boltsystem.jpg When we invented the multi-bolt retention system back in 1999, we knew it would be a world class feature. That is why 7 of our dual case adapter kits use this innovative Marlin Crawler feature. Some competitors try to emulate Marlin Crawler, but the fact is Marlin Crawler has been using this design for more than a decade. Technically speaking, 1 bolt would suffice since the tensile strength of the grade 12.9 bolt far exceeds the axial loading forces of the low speed gear, but we wanted to spread the load across the snap ring while providing an esthetically appealing final product. Our design was changed from a 3-bolt system to a 4-bolt system because the larger Xtreme Duty lower cage bearing prevented an equal 120-degree 3-bolt offset pattern, but allowed for a 4-bolt 90-degree offset pattern. The rest is history.
9. Proper JIS Heavy Duty Fasteners http://www.marlincrawler.com/sites/a...xd_hdbolts.jpg Marlin Crawler has used Japanese Industrial Standard (JIS) hardware since 1994 and will continue to do so. Your Toyota truck doesn't have any 13mm, 15mm, 1/2in, 5/8in, or 11/16in bolts so why should a dual case adapter have non-Toyota hardware? You drive a Toyota, you only carry tools to service your Toyota. Marlin Crawler takes great pride in using the proper hardware for the job. Additionally, you won't see us using any nylon locking nuts because it is common for the nut to lock to the stud in such a manner that the stud gets extracted with the nut. And since the adapter flanges are so close to one another, you can't get the nut off of the stud in order to get the housing off of the adapter plate! Sheesh! Also, the nylon cracks and degrades over time causing the nut to simply unthread. Toyota uses flat & lock washer combinations all over your truck so it is only natural for Marlin Crawler to use the same. Don't get "screwed" with inferior mounting hardware!
http://www.marlincrawler.com/sites/a...sclearance.jpg 10. CAD Optimized Light Weight Adapter Cut Out http://www.marlincrawler.com/sites/a...ptercutout.jpg Using the latest in computer software, we were able to reduce the weight of the adapter plate by an incredible 25% without sacrificing any strength! The adapter cut out also allows for other advanced features such as the shelved oil passages.
11. Unique Margasket http://www.marlincrawler.com/sites/a..._margasket.jpg We have been providing our very own Margaskets for over half a decade now. These gaskets are unique due to their universal nature. You don't have to second guess which gasket to use with which donor transfer case, we've taken all of the guess work out of the install process. Marlin Crawler customers appreciate the attention to detail of our products.
12. EcoSeal Transmission Output Seal http://www.marlincrawler.com/sites/a...xd_ecoseal.jpg The EcoSeal needs little introduction. This heavy duty replacement transmission output seal has a metal flanged lip to ensure a full installation into your transmission's tail-housing. This prevents installing the seal sideways/crooked, a severe installation error that reduces the life expectancy of the seal as well as the sealing effectiveness. The EcoSeal eliminates installation errors ensuring the job is done right the first time. A transmission rebuild is expensive; keep your transmission and transfer case gear oil separated.
Conclusion After examining the most feature rich and technologically advanced Toyota RF1A dual case adapter kit in the world, we are certain you will agree that the new Marlin Crawler Xtreme Duty MC07 is on a completely different level far, far above all the rest. There simply is no comparing a Marlin Crawler with any other. This new XD adapter is available in both standard & 10-degree rotated versions, cast aluminum (MC07-XD) or billet aluminum (MC08-XD) versions. Our chain drive adapters have many of these same features as well, including our Hilux chain drive billet adapter (MC10-XD), Tacoma/Tundra/FJ-Cruiser/4Runner chain drive billet adapter (MC09-XD), and our newest MC11-XD which is for 4.0-liter applications (currently only available for autos). Click here for our full dual case adapter line-up: http://www.marlincrawler.com/transfe...s/dual-t/cases http://www.marlincrawler.com/sites/a...07-RXD_640.jpg |
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