Which generation of Shengrui transmission is used in the Bestune T99?
4 Answers
The Bestune T99 is equipped with the third-generation Shengrui transmission, with the 8AT tuning style heavily focused on comfort. The Bestune T99 is a mid-to-large SUV under the Bestune brand, featuring a wheelbase of 2870 mm, and dimensions of 4800 mm in length, 1915 mm in width, and 1685 mm in height. The entire lineup of the Bestune T99 is powered by a 2.0-liter turbocharged engine, delivering a maximum power of 224 horsepower and a peak torque of 340 Nm. The engine reaches its maximum power at 4500 to 5500 rpm and its peak torque at 1650 to 4500 rpm. This engine is paired with an 8AT transmission.
My 2019 Bestune T99 is equipped with the Shengrui 2nd generation 8AT transmission, model SR-8AT350 if I remember correctly. This gearbox pairs really well with the engine - gear shifts are barely noticeable, and driving under 80 km/h in the city is particularly smooth. However, when cruising at 110 km/h on highways, the RPM rises slightly, with fuel consumption around 9L/100km. I heard the newer models switched to Aisin transmissions later, but as an early owner with over 30,000 km on the odometer, apart from two transmission fluid changes during maintenance, I haven't encountered any mechanical issues.
I've been repairing transmissions for seven or eight years and have disassembled many Besturn T99 models. The 2019 to 2020 batches mostly come equipped with Shengrui's second-generation 8AT transmission. The transmission housing has anti-counterfeit laser engraving with the text 'SR-8AT350', capable of handling a maximum torque of 380 Nm. A common issue is that the solenoid valves in the valve body are prone to sticking, causing jerky gear shifts, so we always keep replacement parts on hand. However, since last year, newly manufactured vehicles have switched to Aisin transmissions from Japan, which actually makes repairs more challenging, with original parts costing over a thousand yuan more.
Last time I took my T99 to the 4S store for maintenance, the technician told me that my 2020 model's transmission is a second-generation product from Shengrui in Shandong. They used a diagnostic tool to read out five shifting modes including Comfort/Sport/Winter, but it defaults to automatic switching. It upshifts quite actively during acceleration, but occasionally there's a slight thud when downshifting from 3rd to 2nd gear during sudden deceleration. The technician recommended changing the specialized transmission fluid every 60,000 kilometers, claiming it contains special friction modifiers. The 4S store quoted approximately 1,200 yuan including labor costs.
