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Discussion Starter · #1 ·
My FL is developing a knock that's very reminiscent of what I had on my Mk2 years ago that was fixed twice as a TSB. It required putting Loctite on the driveshaft hub spline. Is this still a problem on Mk3s? It's not noticeably different cornering, but carries on the same declutched. I've only done 24k, but out of warranty.
 

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Discussion Starter · #2 ·
No-one had this problem with a Mk3? Fairly sure it's not a wheel bearing, as it's the same when cornering. I checked the disk temperatures in case one wasn't releasing fully.
 

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I had a knock coming when pulling away and occasionally while changing gears. They found out it was 3 bolts from the gearbox housing that had come loose.
The car is currently in the garage getting a new gearbox housing and a gearbox rebuild.

Also done about 24k miles
 

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Discussion Starter · #4 ·
I had a knock coming when pulling away and occasionally while changing gears. They found out it was 3 bolts from the gearbox housing that had come loose.
The car is currently in the garage getting a new gearbox housing and a gearbox rebuild.

Also done about 24k miles
Thanks Ali. Doesn't sound the same. I hope yours is on warranty! The knock sounds related to the wheel speed, and doesn't vary with the gears, or whether the clutch is in or not. I need a service soon, so will get them to look at the same time rather than paying for a separate diagnostic (£100+!). It doesn't sound like the Mk3.5 has had a TSB on the driveshafts like the Mk2.
 

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Well I had my third service at Harwell Ford Abingdon, and asked for a diagnostic on the knocking noise. A mechanic came out with me, and had a look on the ramp, but they couldn't find the problem. At least they didn't charge me for the diagnostic. They said it wasn't the driveshaft, and no TSBs. I think the design is different to the Mk2s.

Anyone know of a specialist around the Oxford area that might make a more convincing job of it? I'm reluctant to just wait for it to get worse.
 

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Discussion Starter · #6 ·
AN UPDATE - I had new tyres on the back last March, moving the old rears to the front, paying for them to be balanced. They said there was some waving on the inside edges. The knocking was noticeable soon after, but I didn't think of the tyres, as they were supposed to be rebalanced. I had diagnostics at two garages, but they couldn't find anything, or indeed hear it! It was quite localised to the driver's seat, and I'm largely deaf in the left ear, so maybe made it sound worse to me.

Just before Christmas, I got a slow puncture on the nearside front checked out, and they found a 1/2" self-tapping screw right on the inside shoulder, so it obviously couldn't be repaired, still 4mm left on them. I reluctantly ordered a pair of Goodyear Asymmetric 5s, and that has cured the knock! Either they didn't rebalance the old rears when they moved them to the front, or some weights fell off soon after (brake dust not cleaned off?), or the waving was enough to cause the knock.

Great to have it sorted, but I should have thought of that, and the garages certainly should!
 
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