What are the consequences of replacing the transmission housing?
2 Answers
Introduction to the consequences of replacing the transmission housing: There will be no issues as long as the standard assembly process is followed when replacing the transmission housing. If it is replaced at a 4S shop, you can use it with confidence. The transmission housing is a shell structure used to install the transmission mechanism and its accessories. Below is some relevant information about the transmission housing: 1. To reduce wear on parts and power loss caused by internal friction, lubricating oil must be injected into the housing, and splash lubrication is used to lubricate the working surfaces of gear pairs, shafts, bearings, and other components. 2. There is an oil filler on one side of the housing and a drain plug at the bottom. The oil level is controlled by the position of the oil filler. Radial oil holes are drilled in the constant-mesh gear of the first shaft and the third gear on the second shaft. Radial oil grooves are cut on the hub end faces of the reverse idler gear and the constant-mesh drive gear of the intermediate shaft to lubricate the needle bearings in those areas.
I know that replacing a transmission housing can be a risky job if not done carefully. Last year, a car owner tried to save money by replacing the housing himself, but within weeks, the transmission started leaking oil—leaving stains all over the garage floor. The internal gears were exposed to dust, accelerating wear and causing gear-shifting issues like stiffness and strange noises. I've encountered similar cases a few times—if the job isn’t done professionally, like improper sealing gasket installation or internal component scratches during disassembly, the transmission’s performance can deteriorate rapidly. In severe cases, it might even leave you stranded on the road. The costs add up too—what could have been a simple fix turns into skyrocketing repair bills plus towing fees. My advice? First, assess the extent of the housing damage—sometimes welding repairs are enough. If a full replacement is necessary, always go to a professional repair shop to ensure genuine parts and standard procedures are used, avoiding endless future headaches.
