What are the causes of transmission noise in the Buick Excelle?
3 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.
During maintenance, Buick Excelle owners often complain about transmission noise. Common failure points include damaged input shaft bearings, which sound like rattling or humming due to excessive component friction. Oil-related issues are also frequent, where dirty or insufficient oil leads to poor lubrication and accelerated wear. Sometimes, clutch slippage or internal gear damage can produce noises. Control module problems are less common but still possible. Don't ignore these small sounds—they may indicate more serious mechanical failures. Delaying repairs can damage the entire system. It's best to visit a professional shop for diagnostic tool inspection, as early repairs save money and ensure safety.
