Problems with Jonny Joints

Beowulf

Expedition Leader
What are the know issues with JJ? How do you prevent it? What is the suggested maintenance on them?
 

Metcalf

Expedition Leader
Curries version of the joint or a copy?

They will loosen up over time and need to be shimmed to be tight. You have to use a press to put them together properly ( and take them apart if they are tight ).
The bushings are not avaliable from anyone but Currie ( and distributors ) last I checked ( been a few years )
Be careful making your own 'adjustable' version with stems welded on. The forged one-piece units are better.
The grease used to lubricate them needs to be polyurethane compatible.
They are a little stiffer 'feeling' than the stock rubber bushings. If you have a slight rear driveline vibration you will notice it more.
 

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