[Rovernet] Diagnostic help please

[Andrew Holland]

Hi from Australia,

It's also worth checking the read Bolt in the Gearbox, as I had a similar noise in my 2000TC.

You will need to remove the Drive Shaft (just remove 4 bolts at each end) , then check the large bolt in the rear of the Gearbox where the Drive Shaft connects. 

Hope this helps
Andrew Holland!


-----Original Message-----
From: Rovernet [mailto:rovernet-bounces at rovernet.org] On Behalf Of magnet--- via Rovernet
Sent: Wednesday, 11 February 2015 6:18 AM
To: Rovernet
Subject: Re: [Rovernet] Diagnostic help please

I second Jim's comment about a faulty half-shaft universal joint.  Best way to check is to jack the rear of the car up and support it under the rear end of the trailing arms (beneath the shock absorber mounts). That way the half shafts will be in approximately the same position as when the car is on its wheels.  Put the hand brake on and try to rotate the back wheels.  If all is well, there should be no play at all.  If you can feel some lost motion, get under and look to see if it's the inboard or outboard universal that's causing the problem.

The issue with the rear brake could be an inoperative self-adjuster (a not uncommon problem).  As Jim says, that's a story in itself, and regrettably, it will probably mean lowering the final drive to get the caliper off.

Cheers,

  -- Bill Daddis



On 10-Feb-15 2:03 PM, James Pile via Rovernet wrote:
> An often-heard rear thump can come from a universal joint that's on it's way out.With the car on a lift, "wiggle" (technical term) the tires to discover any play, rather than sticking, in any of the ball joints. That's the only rear thump I've experienced  in the past 40+ years of Rovering. But that's the obvious analysis. Perhaps there are other owners that will give you alternative things to check, but your brief description of the problem does fit the suspect ball joint.  The rear caliper is a whole different matter.
>
> 	Good luck!
>
> 		Jim Pile
>
> On Feb 10, 2015, at 1:36 PM, LANCE LA CERTE PSY D via Rovernet wrote:
>
>> 1970   3500S  P6B  NADA
>> Background----Rebuilt engine (2,000 miles total), rebuilt Borg-Warner 35, replaced differential (lower mileage, not rebuilt), rebuilt rear brake calipers.
>> Car has developed a thumping which appears to be coming from the rear of the car.  At speed it disappears, but instantly returns as soon as you take your foot off the gas.  I've had the car up on the lift and with the rear end suspended and the transmission in neutral I can rotate the rear wheels by rotating the propeller shaft, i.e., nothing seems to be 'sticking'.  I also noticed the left rear caliper is not engaging (right disc is hot to touch after drive, left is cold).
>> I would appreciate any help in how to diagnose this thumping (and if I'm going to need to drop the differential to address the brake caliper.
>>
>> Lance La Certe, Psy.D.
>> It is absurd to divide people into good and bad. People are either charming or tedious.
>>
>>
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