[TR] OD gear box question

[DAVID MASSEY]

 Not off hand but it is better than what you get with the A-type.  What I recall is that 3000 RPM will give you 75 MPH with an A-type and 78 with a J-type.
Yes, I did it with some angle iron and a stack of rubber washers.  I have since switched to a newer frame from a '73 so I am back to factory-fit.  A local club member put a J-type in his '71 but I haven't seen how he did it.
 
Dave 

 
 
-----Original Message-----
From: David P <frogeye at porterscustom.com>
To: DAVID MASSEY <dave1massey at cs.com>; triumphs at autox.team.net <triumphs at autox.team.net>
Sent: Tue, Nov 30, 2021 8:40 am
Subject: Re: [TR] OD gear box question

 Yes, J type for a 71' TR6    Yep, some angle iron made it work.. No drilling needed... a MIG yes.. LOL  Dave, do you know the reduction percentage of the J type?  dp
  On 11/30/2021 7:34 AM, DAVID MASSEY wrote:
  
 
  Did you get the A-type or J-type overdrive.  They switched in 1973 from the A to the J-type and modified the frame to suit.  The J-type is not a direct fit.  It can be done but it is an unorthodox mounting.  IOW: roll your own.
   
  Dave 
 
   
   
  -----Original Message-----
 From: David P <frogeye at porterscustom.com>
 To: Triumphs (triumphs at autox.team.net) <triumphs at autox.team.net>
 Sent: Tue, Nov 30, 2021 8:13 am
 Subject: [TR] OD gear box question
 
 Owners,   I acquired a Factory OD gear box for my '71 and discovered 
  that the transmission mounts on my chassis do not correspond to the 
  mount on the box... So, were the cars ordered with OD modified at the 
  chassis mount location?
  
    With the OD, removing the driveshaft becomes a bit more 
  problematic...due to moving the mount rearward nearly 6 inches. DaveP
  
  -- 
  Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM. 505-352-1378 My World go here: WWW.PORTERBIKES.COM/
  
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Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM. 505-352-1378 My World go here: WWW.PORTERBIKES.COM/ 
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