[TR] OD gear box question

[David Porter]

Nice job Glenn. DP

On December 14, 2021, at 6:25 PM, "Glenn A. Merrell" <controls at freelanceconsulting.net> wrote:

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David P,

I did my TR250 J Type adaption which is the same forward frame mounting points as the early manufacture dates ’71 TR6 using just angle iron and bolts, and some custom modified polyurethane bushings, no MIG needed.

 

The adapter bracket is really quite simple: two 1.5” cross section x 3/16” x ~7” long angle irons and another piece of the same angle about ~4.5 inches long.  Drill three holes in the 7” pieces,  four holes in the 4.5” piece, die grind  a few clearance points for the J Type Adapter housing and 90 degree drive clearance, paint, add a few pieces of adhesive rubber to the sides of the 7” pieces and bolt it up.  I did add some drilled nut/bolts for a wire/ cotter pin just to keep things in place.

 

Whole construction was about 2 hours, probably spent more time fretting about it.

 

I drive quite spirited and I’ve not had any issues where the bracket would need to be welded.

 

Glenn Merrell

aka Stag-By-Triumph Garage 

Remember, “the BEST trophies are: Miles on the Odometer; Stone chips in the paint; and DEAD BUGS on the windscreen … with the occasional smell of manure!”

 

 

 

From: Triumphs <triumphs-bounces at autox.team.net> On Behalf Of David P
Sent: Tuesday, November 30, 2021 7:40 AM
To: DAVID MASSEY <dave1massey at cs.com>; triumphs at autox.team.net
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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