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Old 10-13-2013, 01:48 PM   #1
anteek
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Default '40 merc rear;is pinion and driveshaft 1 piece?

i have a '40 merc rear I want to put under a '29 unfendered hotrod.I was told the driveshaft is one piece with the pinion gear and difficult to shorten. Ant truth to it?
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Old 10-13-2013, 02:00 PM   #2
Bob G/Spanaway
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Default Re: '40 merc rear;is pinion and driveshaft 1 piece?

Yes, that's true.
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Old 10-13-2013, 06:58 PM   #3
bobH
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Default Re: '40 merc rear;is pinion and driveshaft 1 piece?

There have been past posts on this, but maybe too long ago. I think back when this was 'Shelly's house'. In-any-event, that 'one-piece' is generally worth working with, as it is reportedly usually a 3.54. The deal is, cut it, and spline it like a Ford pinion. Then, use a 'Ford-based' driveshaft, which you were going to do anyway since you would be shortening it for your 29. There used to be someone that posted on here, where to send it for splines, if you can't find someone locally.
I've long forgotten or lost the info.
JMO

Couple PS's... First, I'm sure that someone out there can attest to cutting & welding that one-piece shaft. I, for one, worked with a fellow that had a cut & welded driveshaft, and used it for years while I knew him (no problems). The one I'm speaking of was cut, and machined for a sleeve, then welded to the sleeve.
Second, if you are looking for help to cut & re-spline at the pinion, you might try contacting the EFV8 club rear-end guru's... Conneley and Kreihble (sp?), in the V8 Times, under Columbia's. Both are near Temecula, CA. I'm pretty sure Dan was the one that once told me the source to have the Merc pinion splined.

Last edited by bobH; 10-14-2013 at 10:20 AM.
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