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Is the Fast 8JS85E a fast or slow transmission?

2 Answers

McIsaac

07/25/25 5:02pm

Fast 8JS85E is a fast transmission. The Fast 8-speed series 8JS85 is an extended version. There are two types of Fast main transmissions: with synchronizer and without synchronizer. When equipped with a synchronizer, to shift gears in the main transmission, first shift to neutral, press the clutch pedal fully, and then directly engage the corresponding gear. Below is an introduction to Fast: 1. Introduction: Fast, the full name is Shaanxi Fast Auto Drive Group Company Limited, which was restructured from the Shaanxi Automobile Gear Factory. 2. Business: It is a large-scale specialized production base mainly producing heavy-duty vehicle transmissions, transfer cases, power take-offs, and various automotive gears and their forgings and castings. 3. Products: The group company's main products include: dual countershaft series transmissions produced with American technology and various series transmissions independently developed and produced; series power take-offs and transfer cases matching the above products; OEM gear export parts and various domestic and imported automotive gear forgings and auto parts.

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AlexisRose

08/11/25 10:02pm

Having driven trucks for over a decade, the FAST 8JS85E transmission is definitely a fast gearbox. Why do I say that? Because it features an overdrive design, with a top gear ratio of just 0.79, which lowers engine RPM on highways and delivers outstanding fuel efficiency. When I run long-haul routes, this transmission saves me over 10% in fuel consumption compared to slow-gearbox models, making it possible to save thousands in fuel costs monthly. Its 8-speed manual operation offers smooth shifting, and starting isn’t too strenuous—perfect for seasoned highway drivers like us. Slow gearboxes, like some direct-drive models, excel at climbing but guzzle fuel at high speeds, which isn’t cost-effective. This model has been popular in the trucking world for years, with low maintenance and failure rates. When buying used, just look for its fast-gearbox label. Remember, the 'E' in the model number 85E hints at overdrive—pick the right one, and your trucking life gets easier.

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