[Fot] Spitfire Over Drive

[D V]

It appears that way from a measurement point of view but the street car guys talk about drive shaft differences unless I am misunderstanding. I guess I could break out my service manual and see what it says.

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________________________________
From: Greg Blake <gblake58tr3 at icloud.com>
Sent: Monday, September 24, 2018 9:55:31 PM
To: D V
Cc: Fot
Subject: Re: [Fot] Spitfire Over Drive

Derick

I assume it is the same as the big TRs. The OD transmissions have a longer transmission main shaft. Input shafts and drive shafts should be the same. In other words, you can swap a non OD for an OD and only have to worry about differences in the rear mount.

Make sense?

Greg

Sent from my iPhone

On Sep 24, 2018, at 7:13 PM, D V via Fot <fot at autox.team.net<mailto:fot at autox.team.net>> wrote:

I received a single rail j type over drive in my spares when I bought the car years ago and I never used. The previous owner used it some but then abandoned it because they could get used to switching back and forth in and out of OD.

My understanding was that these came from the factory with a longer input shaft and therefore needed a shorter drive shaft? My crude measurements appear that the overall length is the same and the input shafts are the same. The only thing that looks different is the location of the mount to the frame cross member.

I don’t remember the P.O. saying anything about drive shafts and I don’t have one in my spares. Could he have changed the input shafts for an easy swap of trans? I think I have a fabricated mount adapter for the cross member.

Any insight?<Image.png>
Over drive in the distance

<Image-1.png>
Over drive; non OD had throw out bearing and was a little more difficult to measure


<Image-2.png>
Over draft near


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