Gear Shift Lever Thread Size?

[PAUL161]

What's the thread size on a "B" gear shift lever? Need to know if the threads are the same on a 55 TF. PJ

 

[PAUL161]

What's the thread size on a "B" gear shift lever? Need to know if the threads are the same on a 55 TF. PJ

<span style="color: #009900">Thanks anyway, but I just received the answer on another forum. PJ</span>

 

[DrEntropy]

GAH!!

...my thread pitch guages are fifty miles south!!!

I ~HATE~ it when that happens!

In a month this will all be <span style="font-style: italic">different</span>.

 

[DNK]

I always thought it was a standard size amongst LBC's

 

[Steve_S]

No, there are different sizes. Even MGBs use two different threads, 5/16"-24 on early cars (62-67) and 5/16"-18 on later cars.

 

[PAUL161]

Thanks Steve, Much appreciated. I just found out the threads on the TD & TF are 8X1.0 metric. Strange how the same manufacture used different threads on their cars as the models changed. It was nice that they got away from the BSF threads though. PJ

 

[DNK]

Paul, I find it very interesting that the threads are metric. I didn't think the UK cars started that until later.

 

[DNK]

No, there are different sizes. Even MGBs use two different threads, 5/16"-24 on early cars (62-67) and 5/16"-18 on later cars.

That's why Bob's my uncle

 

[Steve_S]

Hmmm... I thought I remembered TD/TF being standard, not Metric. I can't imagine why a Metric thread would be used.

 

[Billm]

M8-1.0 calculates out to 5/16-24 (do the math). I would be surprised if they used a french system in England at that time.
BillM

 

[Steve_S]

The engine is French Metric, but unless I'm mistaken the TD gearbox was British-made. I don't know the TD stuff intimately enough to say for sure.

 

[David_DuBois]

The T series cars used an obsolete French Standard Metric thread in the engines and transmissions. All other fasteners in the T series cars were BSF and a few BSB and BSC. The only exception to the above was in the later TDs and TFs rear axles which was Unified Fine (AKA National fine or SAE). For information 8 X 1mm threads 0.0025" larger than 5/16 and the thread count is actually 25.4TPI vice 24 TPI in a 5/16 SAE fastener and are a different thread form. So while the two threads can be fairly easily forced over the other, the two are not really interchangeable.
Cheers,

 

[Steve_S]

Interesting, I didn't realize the TD gearbox was manufactured in France as well. That would almost certainly make it Metric... sort of. :wink:

 

[DNK]

Well I'll be danged

 

[JPSmit]

Well I'll be danged

No, given the information, vous etes danged

 

[DNK]

Merci pour la correction

 

[JPSmit]

de riens

 

[DNK]

Voulez-vous dire "De Nada"

 

[JPSmit]

Voulez-vous dire "De Nada"

de riens

 

[David_DuBois]

Interesting, I didn't realize the TD gearbox was manufactured in France as well. That would almost certainly make it Metric... sort of. :wink:

Neither the engines or gearbox were built in France, rather, the machining in the Hoskiss munitions factory that was brought from France to England and later purchased by Morris. The following was written by Jerry Felper of Vintage MG club of California on the subject of the engines and transmissions in the T series cars.

"The XPA series engine was originally designed by Hoskiss, which was a French division of an American armaments Company. They moved to England during WW1 so that Germany could not get to their production of armaments. They copied an American Continental engine to build the XPA engine, which was sold to Morris. Their plant was bought by Morris in around 1932 and became Morris Motors. All their threads were French Metric except for holes added later by Morris for particular car. That is why the exhaust flange bolt is English."
Cheers,