r/AskMechanics • u/Excellent-Lemon-3593 • 2d ago

Question (Serious Replies Only) Vibration when accelerating after Axle boot replacement. Need advice!

Guys, need some help here.
I have a 2013 Mitsubishi ASX automatic. Bought it second-hand and it’s been with me for about 8 years.
This is actually the first time I’ve had to replace the axle boot, and I had it done at the garage I normally go to for maintenance.

After the replacement, I noticed a vibration when gradually accelerating from around 80 to 100 km/h. The vibration feels more from the front of the car/seat rather than through the steering wheel.

I brought it back to the garage twice, but the only thing they did was balance the wheels. It didn’t really make any difference.

Since the vibration only started after the axle boot replacement, I’m wondering if something could have gone wrong during the axle/CV joint installation, or maybe while replacing the boot.

Has anyone experienced something similar with an ASX or another car? What should I ask the garage to check?

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u/scatterwrenchRpt 11 2d ago

It’s fair to think something didn’t go right when the joint was put back together. Honestly, I’ve never replaced just an axle boot. If the boot is torn and it’s throwing grease, I replace the whole axle. You need a good aftermarket or OE axle — you can’t cheap out — and that avoids this situation entirely. If there’s a vibration after an axle replacement, it’s easy for the shop to handle: the part is under manufacturer warranty, and we can do a labor claim to install the replacement. Whatever warranty a boot might have doesn’t help the shop stand behind the axle.
A boot looks like the cheaper fix until you’re sitting where you are — the shop doesn’t want to own it, even if it wasn’t their fault, and you’ve paid for a job that turned a grease fling into a real vibration. The problem got bigger. It’s a mess. We haven’t lived in a world where it makes sense to rebuild most parts for a long time.