[Fot] Gearbox thoughts

[fubog1]

Yeah every time that box goes "GRAUNCH", it makes a bunch of little bitty metal bits that settle down in the bottom of the case, right down there where the laygear lives...
Yeah Jeff's fast, he's finally figuring out how to use those torques he's got!
Glen

 

 

-----Original Message-----
From: Terry Stetler <tlizzard at msn.com>
To: fubog1 <fubog1 at aol.com>; Scott Janzen <sjanzen at me.com>
Cc: fot <fot at autox.team.net>
Sent: Fri, Oct 16, 2015 11:14 am
Subject: Re: [Fot] Gearbox thoughts


 

We change the gearbox oil after every race weekend on Jeff's TR3, per Glen's advice.
 
It's cheap insurance, and it works.   And we all know how fast that TR3 is now...
 
Thanks Glen.
 
 
Terry Stetler
  
-----   Original Message ----- 
  
From:   Scott Janzen   
  
To:   fubog1 
  
Cc:   fot at autox.team.net 
  
Sent:   Thursday, October 15, 2015 6:31 PM
  
Subject:   Re: [Fot] Gearbox thoughts
  


  
Oops, one more thing to add to my pre-race prep.  Every race   weekend, really?

Sent from my mobile device 
  

On Oct 15, 2015, at 12:35 PM, fubog1 <fubog1 at aol.com> wrote:


  
I haven't converted one to the Stag type thrust bearing but I do   advocate changing the gearoil regularly (every race or 2), they live a lot   longer. The trash in the gearoil eats the washers up, exacerbating the   load/wear issue.
Glen
   


  


  


  
-----Original   Message-----
From: Dean Tetterton <tr3a58 at verizon.net>
To: FOT Triumph   <fot at autox.team.net>
Sent: Thu, Oct   15, 2015 12:11 pm
Subject: [Fot] Gearbox thoughts

  
Since we have been thinking about gearbox's. The Stag layshaft was changed by
Triumph to try and make them last longer due to the additional torque of the V8.
They added needle bearings in place of the brass thrust washers at each end and
an additional bearing  in the lay gear at the end where 1st gear is. Has anybody
tried this set up in a racing box? Does it help in the wearing of the layshaft?


The addition of needle bearings means that the spacing of the box inside
where the lay gear rides is greater. The needle bearings being thicker than the
thrust washers. This means that the Stag box is different inside. 
I have been
able to make a tool that will cut the inside of a TR box to be the same as a
Stag. I plan to build a box using the needle bearings. Don't at this time plan
to put another bearing inside the lay gear. If I make the lay gear deeper
inside, I am afraid it will not be hard enough for the bearings to ride inside.


Before doing all this, has any body gone down this road before. If so what
has been the experience? 
Also any body with thoughts chime in. Is it worth the
effort?

Dean
T.

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