Changing From Hardy Spicer Joints To Pot Joints On A 75 Auto
Posted 10 February 2020 - 07:56 AM
Posted 10 February 2020 - 08:33 AM
There was a short period around the time your car was made were the output shafts from the gearbox were infact for pot joints, but there was H/S Adaptors factory fitted. Just check the outputs on your existing gearbox. If there's a bolt in the centre of them, then yes, they are old school types, but, if there's no bolt, then just knock them off and fit them on your replacement gearbox.
If you do have the old school bolt on types, then you can change the drive shafts to Pot Joint types.
Posted 10 February 2020 - 08:47 AM
Posted 10 February 2020 - 11:31 AM
you will need the pot joint drive shafts from a later box if you are using an Auto box that has pot joint fittings.
Posted 10 February 2020 - 11:46 AM
Posted 10 February 2020 - 04:38 PM
There is no bolt in my output shafts, but the outside diameter looks to be bigger than that of a pot joint, where they would go into the oil seal. Hope that makes sense?
Can you post up a photo ?
Posted 10 February 2020 - 06:04 PM
You're going to need pot joint drive shafts too as the h/s shafts are not compatible with pot joints.
Posted 10 February 2020 - 07:06 PM
Posted 25 February 2020 - 08:26 AM
Use the diff side plates off the old box with new seals and gaskets as the output flanges you have should fit the pot joint outputs
It's an auto, they only have one side plate...
Later cases (1979 on) take Pot joints (Sliding Birfield) and earlier take either Hardy Spicer that are either knock on type or bolt on type.
So in your case you will need to either get an earlier AP2 transmission or later shafts with sliding Birfield,
I'll PM you later as I have the parts
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