[Fot] OD units available

[Steve Yott]

Is that ever a deep question!  I am sure there are many opinions and all
would be correct.  The A-Type was I believe one of the first designs and
uses an accumulator to store oil at the operating pressure which in theory
causes nearly instant operation vs. the J-Type which has to pump up the oil
to operating pressure when engaged.  You would think this would be a slow
operating unit but they are surprisingly fast in engagement.  The J-Type
also uses a lot fewer internal and external parts which again by theory
would make it more reliable which I think it is.  I have built many A-Type
that run in street and competition and they can be very reliable too.

To keep originality the A-Type was used on TR 6's through 72 and then they
went with the J-Type and the necessary frame mount changes.  There are
adaptors available to install J-Types in earlier frames.  

In the end the J-Type can be purchased a little cheaper than an A-type and
is usually cheaper to rebuild as long as it was not run out of oil.  

Steve Yott

-----Original Message-----
From: fot-bounces at autox.team.net [mailto:fot-bounces at autox.team.net] On
Behalf Of Guy Morter
Sent: Sunday, November 24, 2013 3:55 PM
To: sherry robyn; Joe Alexander; fot at autox.team.net
Cc: Mgruber921
Subject: Re: [Fot] OD units available

Which type is preferred for racing?

Guy Morter
Vintage Auto Service
262 573
4511

Flatheads Forever!



On Sunday, November 24, 2013 2:25 PM, sherry robyn <sherryjimmy6116 at att.net>
wrote:
  
I would like to know if for a late TR6 and how much?  Thanks, Jim
________________________________
From: Joe Alexander
<n197tr4 at cs.com>
To:
fot at autox.team.net
Cc: Mgruber921 <mgruber921 at aol.com>
Sent: Sunday,
November 24, 2013 11:42 AM
Subject: [Fot] OD units available
FOT,

If
anyone is looking for an "A" type overdrive, Marv Gruber has got a few
available for sale.

He is copied here.

Joe A
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