Weird thump thump thump today from my rear wheels today
#1
Race Director
Thread Starter
Weird thump thump thump today from my rear wheels today
Was at Calabogie today was on track when the car started developing a vibration from one or both rear wheels. It's there whether or not the clutch is engaged. It sounds like thump thump thump and the frequency of the thump is relative to speed travelled.
When the suspension was loaded on one side it went away.
One of the guys there thought it sounded like a flat spot on a tire. So I take off the tires, have them rebalanced. Same vibration. Took tires off, one by one and installed another set. Same vibration.
There is no play in either rear hub. Brakes looked ok. Nothing obvious looking at the car from on the ground.
Loaded the car up (it runs on its own) and dropped it off at AutoImport. I'm sure I'll find out what the deal is.
Mileage is 19500km. Weird.
When the suspension was loaded on one side it went away.
One of the guys there thought it sounded like a flat spot on a tire. So I take off the tires, have them rebalanced. Same vibration. Took tires off, one by one and installed another set. Same vibration.
There is no play in either rear hub. Brakes looked ok. Nothing obvious looking at the car from on the ground.
Loaded the car up (it runs on its own) and dropped it off at AutoImport. I'm sure I'll find out what the deal is.
Mileage is 19500km. Weird.
#6
Rennlist Member
Have the wheel carrier checked out too. I had the same thing happen to me and it was the wheel bearing. The bad wheel bearing was left in there too long and warped the wheel carrier.
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#8
Race Director
Thread Starter
I always thought bad wheel bearings squealed rather than thumped. My tech tells me a chunk came off causing the thump.
#9
Rennlist Member
Nah wheel bearings don't squeal they moan then thump. Wait til your top hats on the rear shock struts start cracking- squeaks so bad it'll wake up the dead. Mike
#11
Rennlist Member
If u want to know if it's the hat spray liberal amounts of wd40 on top of the rear strut towers- let it sit for 30 minutes. Then drive it if no more squeaking- that's the source of the squeak. Mike