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 Overdrive Propshaft
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jetglo

United Kingdom
13 Posts

Posted - 25 Jan 2020 :  21:30:45  Show Profile  Reply with Quote
I am in the throes of a Series 4 overdrive conversion.
Could anyone please provide me with the original specified propshaft length for the overdrive car. I have measured two examples and they vary by 25mm!
Thanks.
Bob

hillman

France
75 Posts

Posted - 26 Jan 2020 :  09:08:59  Show Profile  Reply with Quote
Hi,
As far as I remember the od propshaft for a serie 3a I installed on my car was 3inches shorter than the non od one.
I hope this helps you and I will try to find the length of both propshaft. I have this info somewhere but cannot locate it at the moment.
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pruyter

Netherlands
282 Posts

Posted - 26 Jan 2020 :  11:04:23  Show Profile  Reply with Quote
The difference could be explained by knowing that the propshaft of Arrow-type with overdrive has a different lenght caused by the nose of the diff which is longer and the place of the gearbox/overdrive including the longer bellhouse of the Arrow gearbox.
I know that the nose of the diff of the Arrow type cars is about 1 inch longer and if such a diff is installed on an Audax type car (like the Rapier series IV) than the propshaft has to be shortened by about an inch.

Regards,

Peter
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jetglo

United Kingdom
13 Posts

Posted - 27 Jan 2020 :  08:45:53  Show Profile  Reply with Quote
Thank you both for the information.
The diff. Is certainly an original Audax one but I will take some more measurements under the car and report back!
Bob
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jetglo

United Kingdom
13 Posts

Posted - 05 Mar 2020 :  09:38:42  Show Profile  Reply with Quote
The answer is 3 inches/75mm shorter for the overdrive propshaft.
I have just had the work done be Bailey Morris at St.Neots, nice job and not too expensive.
Bob
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