Hi Randall
My understanding is, it is the size of piston and spring in the accumulator
was changed. I think this affects both the pressure and volume of oil
available to bang the od engaged. Then there are those of us with the J type
and we just have to wait for the little piston to pump up enough oil volume
and pressure at one stroke per mainshaft revolution!! :-(
Here is a good article on OD including an in depth description of this and
other changes! A must read for OD drivers even if you are not going to look
in it!
http://www.buckeyetriumphs.org/technical/AOD/AOD1/AOD1.htm
Graham.
----- Original Message -----
From: "Randall Young"
Subject: RE: TR4a OD Trans in a TR250??
> > Will a TR4a A-Type OD trans work in a TR250? I have a chance to
> > pick up a TR4a parts car with the OD trans in....just want to
> > make sure its compatible.
>
> It will work, however there was a change made to slow down the engagement
of
> the OD; presumably to reduce shock loading to the IRS diff. According to
> the Moss catalog, TR4A solid axle cars did not have this change (although
it
> can be retrofitted).
>
> Might be the hydraulic pressure was higher on the TR250 ... anybody know
> offhand ?
>
> Randall
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