What are the causes of transmission noise in the Buick Excelle?
2 Answers
Buick Excelle transmission noise is caused by: 1. Bearing wear and damage; 2. Abnormal gear meshing clearance; 3. Gear tooth surface metal peeling, tooth breakage, or assembly misalignment; 4. Insufficient lubrication due to lack of lubricating oil; 5. Water ingress into the transmission; 6. Loose housing bolts; 7. Excessive clearance between the shift lever and shift fork groove in manual transmissions; 8. Long-term failure to replace transmission fluid. Taking the 2020 Buick Excelle as an example, its body dimensions are: length 4468mm, width 1765mm, height 1469mm, wheelbase 2611mm, fuel tank capacity 40l, and curb weight 1070kg.
I've been driving a Buick Excelle for almost five years, and recently the transmission has been making a humming noise at low speeds, especially when shifting gears or accelerating. This is most likely due to worn internal bearings or aging components causing increased friction, which produces the noise. Another common cause is low or dirty transmission fluid—insufficient lubrication leads to dry grinding of mechanical parts. I've experienced this before; I delayed fixing it, and when the noise got worse, the repair ended up costing me several thousand. My advice is to check the fluid level yourself as soon as you hear any unusual sounds—after parking, open the hood, locate the dipstick, and check the fluid level and color. If it's clear and transparent, it's fine, but if it's cloudy or low, top it up or change it immediately. Acting promptly can save you major trouble—don’t wait for the problem to worsen.
