Differentail clonk

Clutch, Gearbox, Overdrive, Propshaft, Differential, Drive Shafts, Hubs.
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herald1360
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Differentail clonk

#1 Post by herald1360 » Sat Oct 08, 2016 9:58 pm

Hi all
Got a clonking diff when pulling away.
I can feel a fair bit of play on the back wheels when jacked up off the ground. The diff otherwise runs quietly.
Is this a diy fix ?
Any advice gratfully received

Paul Barlow
Paul Barlow
Exeter
1974 2500TC French blue
1972 Spitfire MK1V 1500cc Signal red

tony
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Re: Differentail clonk

#2 Post by tony » Sun Oct 09, 2016 3:27 am

Check u/j's and drive shaft/axle bolts before getting too worried.
Tony.
1976 2500 TC. converted to S specs.

Lots of bits

1999 BMW Z3.
2006 BMW 325ti.
Hopefully not needing too many bits.
1998 Rover 600



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pete lewis
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Re: Differentail clonk

#3 Post by pete lewis » Sun Oct 09, 2016 8:48 am

if all shafts are sound then drive line play is normally just the float on the sun and planet gears in the diff , these have a good clearance and can give good amount of prop rotation to wind up the drive shafts its not a problem certainly not crown wheel related , the spherical thrusts can wear ( not a normal)you can get nearly 1/4 turn of the prop in some cases .

think you will find many of these cars suffer with a clonk /clang theres many sline drive components with varied clearance from diff quill shaft through to drive shafts

they can all contribiute

Pete
Pete Lewis
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also area organiser for herts and beds tssc.

Mike Stevens
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Re: Differentail clonk

#4 Post by Mike Stevens » Tue Oct 11, 2016 11:39 am

I agree with Pete, if the play is in the diff, the most likely cause is worn thrust washers on the sun and planet gears.

However, if the rest of the diff is OK (no whines, smooth operation etc.) it's worth changing them. CW sells the thrusts, one of which is a fixed size and the other selective. The selective ones have their size stamped on them so you can just replace like-for-like! I have done this on an old diff as an experiment and it is not difficult, the hardest bit being getting the diff out from and back into the car.

So, this may be a way forward for you!

Good luck.

Cheers,
Mike.
(South Oxfordshire)
Register Member No 0355
1971 2.5PI Saloon Sapphire blue
1973 2.5PI Saloon rust some Honeysuckle
1973 Stag French blue
(1949 LandRover was blue should be light green!)

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herald1360
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Re: Differential clonk

#5 Post by herald1360 » Wed Oct 26, 2016 7:24 pm

Hi all
I have now dismantled the rear drive train

I have found the following expensive issues!!

Both propshaft UJs rough, sliding joint has play (will get new one made)
both drive shafts, ujs cups are spinning in the yokes and flanges. Pity, as these are Datsun linear bearing driveshafts
Diff Play in sun gear/inner axleshaft splines

Has anyone fitted or experience of the rilsan coated driveshafts?
Recommeded suppliers? as there is quite a price variation (I don't want anything made from balsa wood!)
Can the diff problem be adjusted?

thanks
Paul
Paul Barlow
Exeter
1974 2500TC French blue
1972 Spitfire MK1V 1500cc Signal red

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TedTaylor
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Re: Differential clonk

#6 Post by TedTaylor » Thu Oct 27, 2016 12:59 am

herald1360 wrote:sliding joint has play (will get new one made)
.................
Recommeded suppliers?
Getting a sliding joint made ............ :shock:

Chris Witor is my choice (and probably many/most others) of you want quality. He is near Cheddar not THAT far from Exeter for a trip up to see him but check his website for times and cost of parts.

MUT
Member 4473 1990
1964 2000 period rally look alike AFH 849B
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2500 Estate WDE 76K RBRR 2014

Mike Stevens
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Re: Differentail clonk

#7 Post by Mike Stevens » Thu Oct 27, 2016 11:45 am

Remember that these are the same parts as used on the Stag and new (OEM) drive shafts seem to be available as well as more modern CV types. There are a lot of Stag specialists around who have these parts.

The play in the diff (sun/planet gear thrusts) is not difficult to fix. The parts are available from Chris and getting it all apart is a bit of a fiddle but perfectly do-able without any special tools. I have done it on one diff which now has very little play.

Cheers,
Mike.
(South Oxfordshire)
Register Member No 0355
1971 2.5PI Saloon Sapphire blue
1973 2.5PI Saloon rust some Honeysuckle
1973 Stag French blue
(1949 LandRover was blue should be light green!)

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herald1360
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Re: Differentail clonk

#8 Post by herald1360 » Thu Oct 27, 2016 7:08 pm

Getting a complete new prop made, including sliding joint by Dave Mac
Paul Barlow
Exeter
1974 2500TC French blue
1972 Spitfire MK1V 1500cc Signal red

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david_rachel
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Re: Differentail clonk

#9 Post by david_rachel » Sat Oct 29, 2016 10:31 pm

I had some rear end noises which rapidly became worse.

Last weekend, indeed with a little help fro Mike Stevens :-) , fitted a recon diff with new Cw & P from T.D. Fitchett (off the shelf, and the cheapest around using Timken bearings) and also CV driveshaft assemblies from CDD

http://www.classicdrivingdevelopment.co.uk/

The transformation is absolutely staggering - had I known, I would certainly have ditched the Triumph splines years ago!
David Rachel

1972 Triumph 2.5 PI Estate Royal Blue
1968 MG 1300 Saloon Connaught Green
1978 Carlight Casetta Caravan
http://carlightrestoration.blogspot.co.uk
1995 Lada Riva 1.5 Estate Cherry

Mike Stevens
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Re: Differentail clonk

#10 Post by Mike Stevens » Sat Oct 29, 2016 11:15 pm

No problem David. Glad you got it sorted OK!

Cheers,
Mike.
(South Oxfordshire)
Register Member No 0355
1971 2.5PI Saloon Sapphire blue
1973 2.5PI Saloon rust some Honeysuckle
1973 Stag French blue
(1949 LandRover was blue should be light green!)

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