[TR] [Fot] Gearbox Number

[Allen Hess]

I don't know when the exact change point occurred (ie serial #) but  
the TR4 bell housing flange is thinner, about 1/4" thick. The TR4A  
flange is about twice as thick and has reinforcing ribs on the bell  
housing.

Allen
On Mar 4, 2012, at 3:56 PM, triumphs-request at autox.team.net wrote:
>
>> Does anyone know if a TR4 gearbox with the number 304692SM on
>> the right side of the casing is out of a TR4 or TR4A?