[TR] A-type OD questions

Anthony Rhodes spamiam at comcast.net
Mon Sep 4 10:08:45 MDT 2023


I have had my TR4A transmission converted to an A-type OD by  noted specialist, and the removal/installation service was done by a reputable shop.
 
I just got it back and the OD seems to work perfectly in 4th gear.  
 
In Third, It will work for a short time, then goes out of OD.  It appears that it is related to the isolator switch.  If I gently push the shifter forward, it stays in OD just fine.  If I pull it back slightly (still in 3rd), it does out of OD, and when I push it slightly forward again, OD re-engages.
 
In second gear, it does not ever engage OD. I did not see the transmission after the conversion, so I do not know IF there is a 2nd gear isolator switch.  But, I think there OUGHT to be..
 
I picked up the car at the end of last week, and I am sure the shops will make good on a perfectly functioning OD.  But I want to know if this is a simple adjustment issue.  Maybe I can do it myself.  I can get the car on a lift and do the work from below if it were feasible.
 
I would rather not pull the interior to access the top, but maybe it is necessary.
 
Any advice/experience with this sort of issue?
 
-Tony
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