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What are the causes of insufficient transmission pressure?

1 Answers

SanJocelyn

07/29/25 5:10pm

The causes of insufficient transmission pressure are: 1. Hydraulic oil: Insufficient hydraulic oil in the transmission or the hydraulic oil does not meet the specified standards. Generally, this type of transmission must use the specified hydraulic oil, such as No. 8 hydraulic transmission oil or the hydraulic oil specified by the manufacturer. Ordinary hydraulic oil is not allowed as a substitute. 2. Clogging: The oil filter in the oil pan is clogged, resulting in too little hydraulic oil passing through. This filter is usually a metal mesh filter, and the most common failure is that the oil filter is not replaced for a long time, and the surface is clogged with various impurities, gums, metal debris, etc. 3. Air leakage: The oil pipe from the oil pan to the transmission pump has air leakage or internal damage or delamination. Air leakage will cause the transmission pump to have insufficient oil suction or even fail to suck oil. Delamination will cause the hydraulic oil passage to narrow, both of which will lead to insufficient pressure in the hydraulic system. 4. Wear: The transmission pump is damaged or excessively worn, resulting in insufficient pressure. Or the transmission pump drive mechanism (shaft gear) is damaged, and the transmission pump cannot rotate. The most common issue is excessive wear of the internal splines of the shaft gear, which cannot drive the transmission pump.

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