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TR6 TR6. What's this noise?

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poolboy

poolboy

Yoda
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Ok, I know you can't hear it but I'll try to describe it. It seems to be coming from the area around the right rear axle. If I make a sharp left turn or a left U- turn and once i get the car going straight again, I hear a noise that sounds like this. Swish, swish, swish etc. If I accelerate it gets a little louder and if I slow down, it goes away.
It doesn't happen every time I make a sharp left, but often enough.
It is not a metallic sound. It kind of sounds like what you hear when a tire is about to go flat. But it is a regular series of swish, swish. swish.
Could it be that the axle splines are binding and causing the tire and wheel to cant after coming out of the turn?
 
Well, on occasion I do hear a click back there when I start out in reverse and sometimes starting out in first, too.
I know I can rule out the click being from the diff mounts, 'cause I just fixed them.
Hub bearings..huh? Thanks. I'll have to do a search on that fix.
 
kodanja, would that be the shims holding the brake cylinder in place? I can check that easy enough.
 
No, I won't do that, but I will take a look at the brake first. I'm not usually that lucky to have it that easy, but there's always a first time.
In fact if we weren't having a downpour right now, I'd be out there having a look. I'll know about the brakes in the morning, you can bet.
I'll report back.
 
Bill,

Do you mean that one of the spring steel clips/shims has broken or gone flat allowing the cylinder to move causing the noise?
 
Definitely time to get that drum off before driving it anymore.
 
First thing tomorrow. But with my luck it's the bearing. I'll be back with my findings.
But BTW, how do I check for the bearing problem?
 
Jack it.
Try to rock the wheel up and down/side to side.
Any appreciable movement is the bearing.
$$$ to fix, and not a job to try yourself without a special hub puller.
 
Thanks, alan. So the slack that I have felt when I actually rotate the wheel forward and backward is not what I'm looking for?
 
also check the stub axle nut for tightness. should be torqued to 110 lbs iirc. Ihad one come loose and the brake drum was rubbing the backing plate when entering a curve,also check the wheel mounting flange,had one of those crack on me as well.
there should very little movement if any, side to side as mentioned above if the bearing is good and set up properly.going by memory here bit i think the bearing is setup to about 2 thou clearence.
a bear of a job to do yourself even with a hub splitter.They can be horribly tight as they are on a tapered shaft.without the proper puller the flange can be nackered in short order.
 
Thank,Opa. So if I'm getting it, a slight bit of end play in and out so to speak is OK. Side to side (inboard and out) or top and bottom (inboard and out) is not ok.
And how about the foward and back rotation of the wheel; as if you can feel some gap or take up between the gears within the differential itself?
 
no,you really don't want to feel any slack if the hub bearings are good,however after many miles driven you will get a little wear etc.and may feel a slight bit of movement. Usually any amount of wheel movement is likely going to be more than 4 or 5 thou. at the hub.
back and forth rotation will give you some slack in the diff. and in the axle half shaft spline which is somewhat normal , the splined shaft can't be to tight as it will bind under load and suspension movement.
what kinda mileage have you got on the rear driveline? Have you ever greased the shafts?
I pull my hubs every winter and grease up the splines,using synthetic grease.
 
I had a feeling this was going to be difficult to diagnose, because right now it is only a "noise"
This morning I checked all the things we talked about last night. Every thing seems to be OK, and believe me, I tried hard to get the wheel to move. I checked both wheels, brake components and put a jack under the drum, jacked it up and down to see if the splined joint was free.
I know you guys gave me 100 years of combined experience on this issue and I appreciate ya'll putting your heads together.
Diagnosing a sound without hearing it,,,,tough.
Swish...swish...swish.
If the noise happened at every turn or would be constant,it might make it easier to track down.
One of these days maybe it will or just go away, BUT if you have any other ideas, please let me know.
So, for now THANKS!!
Opa, I'll get some grease in those splines this Fall if I'm not back in there sooner.
 
The splined joint won't make a noise like that. All you'll get is binding - the infamous Triumph twitch. If it's not the hubs, then the only other thing I can think of is that the pads aren't retracting right. Are all your springs in place? Cylinder isn't leaking? Rubbers ok? All 6 (iirc) nuts holding the hub to the trailing arm tight (and not stripped)? They don't need a lot of torque btw - about 18-20lbs iirc.
 
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