4r100 rebuilt transmission12/8/2023 Subscribe Our Weekly Newsletter Thanks to a Sun Coast Xtreme rebuild kit, billet torque converter and the guys at Swamp’s Diesel Performance, Uriah’s 4R100 transmission is ready to tackle any load. The Xtreme rebuild kit and upgrade parts will work well with the valve body modifications Morin performed previously, allowing the transmission to work well with heavy loads and engines in the 450-550 horsepower range. In addition to using higher quality Raybestos clutches and Kolene-coated steels that handle high heat better, the Sun Coast kit features machined components to allow more clutches and steels to be used in each pack for more holding power and less heat buildup. They suggested upgrading the 4R100 with an Xtreme rebuild kit from Sun Coast Converters as well as their four-disc coast clutch drum and 2-3 shift valve. Rather than rebuild the transmission to factory specs at the dealer or a local transmission shop, Uriah chose to trust the expert diesel specialists at Swamp’s Diesel Performance in LaVergne, Tennessee, once again. So once the forward clutch pack (which is engaged in all forward gears) started to slip, the clutches simply burnt themselves up, leaving the truck stranded. The design and operation of the 4R100 transmission applies the clutch packs in a cumulative arrangement, meaning that the clutch packs apply and add to the previous stage to make the transmission shift gears. Upon teardown, Morin determined that the forward clutch pack suffered a catastrophic failure with the clutches completely self-destructing. Unfortunately for Uriah, the heavy towing of earth-moving equipment for his concrete business, combined with the additional power the 7.3L Power Stroke engine is now making, did not bode well for the factory clutches and the transmission started to slip under load. Swamp’s transmission specialist Dan Morin installed a new triple-disc torque converter as well as a deep Mag-Hytec pan and modified the valve body to increase line pressure and improve power handling. If you’ve been following the build series of articles on the 2003 Ford F-350 7.3L Power Stroke work truck project (Running from June 2014 to the present issue of Diesel World-Ed.) you’ll likely remember that in Part 2 (July 2014) the crew at Swamp’s Diesel Performance performed an upgrade on Vincent Uriah’s 4R100 transmission aimed at providing more power handling and longevity with the high-mileage transmission in hopes that its service life could be extended.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |