[TR] OD gear box question

[DAVID MASSEY]

 I've had good luck with Red Line MTL or MT90.  Some swear by 30W non-detergent motor oil (what I run in the TR3).  Still others prefer the GM Synchromesh Lub.
Anything is better than nothing.
BTW, the overdrive will tell you when the lub is low.  It stops engaging when the level drops too low.
 
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 9:52 am
Subject: Re: [TR] OD gear box question

 I only cut the left side factory mount off as it directly hit the ($200+) solenoid and used the factory angled rubber bush cross mount on angle and square iron bits. So, the rubber bits can be replaced, but the cross piece has to be partially removed to remove the drive shaft. A small inconvenience for the next luck owner..   A types were 22% or 28%.. I'm thinking the J is 25% ?  With the newly added 3.45:1 rear gear set 70MPH is showing 2600RPM. Nice for our NM long distances.... Factory is saying 90wt gear oil... what is your recommendation for oil?  Seems heavy for cold weather temps.  DP
  On 11/30/2021 7:59 AM, DAVID MASSEY wrote:
  
 
  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/      -- 
Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM. 505-352-1378 My World go here: WWW.PORTERBIKES.COM/ 
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