Why does your Honda Odyssey shake above 50MPH?

Answer 1

Check these things:

If you are lucky, it might be one of the tires.

Check visual condition of tires. Any humps or lumps on surface of tire you can see? If so, replace or install spare and retest at speed. Have garage or tire shop check for proper balance, broken cord in tire, tire wear, etc...

However, it will probably be worn suspension parts. This is harder to diagnose yourself and should be diagnosed by a certified mechanic who knows what to look for. Ask around with friends or co-workers for a reputable shop. (They do exist, although rare.)

Common problems on early Odysseys are: worn out sway-bar bushings and end-links. Less common but still prevalent are worn tie-rod ends.

Struts and associated hardware need to be replaced every 75k miles depending on service conditions. Occasionally (but rarely) Honda CV-joints will become defective--usually due to cracks or splits in rubber seals.

If you are handy you can look at the rubber bushings connecting metal parts to each other and the frame on the front-end. If these look cracked, swelled or worn they should be replaced and an alignment check performed by qualified mechanic.