T8D-1A vs T9
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T8D-1A vs T9
Is there a difference between a T8D-1A and a T9? I have been searching and it seems like most people use the names interchangeably. I have a T9-1P in my Divco that is completely shot (the teeth have on a couple gears have been worn half off) so I would like to get a different transmission that is in better shape.
Ideally I would just swap the top cover (the Divco is column shift) and I would be good to go. Does anyone know if there is a difference between the T8 and T9 that would kill this plan?
Thanks
Ideally I would just swap the top cover (the Divco is column shift) and I would be good to go. Does anyone know if there is a difference between the T8 and T9 that would kill this plan?
Thanks
Junior User
Joined: May 2007
Posts: 92
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From: Central Maryland
I'm no expert on this, but here is a little that I know or have seen. I just pulled the transmission out of my 1950 F-5. From everything I understand about it, it is a T9 transmission and the parts book for 1948-53 lists it as a T9. But the case has the marking "T8D-1A" in addition to other markings, cast on the outside of the case.
On the Van Pelt Sales web page:
Ford Truck Four Speed Parts Prices
They say the following:
"The Ford 4 speed spur gear (non-synchro) transmission was essentially the same from 1932 through 1951, although there were some changes in the shifter mechanism, the mainshaft, and the rear mount over those years. This transmission was also marked as a T-8 on the gearbox case in the post-war versions:"
-indicating that the T8 marking was used in some years.
That might explain why folks refer to the T9 and T8D-1A interchangeably. As I said, I'm not an expert, but it makes sense to me that they are essentially the same.
Good luck, I am in the same boat with looking for a replacement, in fact going to check out a possibility today.
Duane.
On the Van Pelt Sales web page:
Ford Truck Four Speed Parts Prices
They say the following:
"The Ford 4 speed spur gear (non-synchro) transmission was essentially the same from 1932 through 1951, although there were some changes in the shifter mechanism, the mainshaft, and the rear mount over those years. This transmission was also marked as a T-8 on the gearbox case in the post-war versions:"
-indicating that the T8 marking was used in some years.
That might explain why folks refer to the T9 and T8D-1A interchangeably. As I said, I'm not an expert, but it makes sense to me that they are essentially the same.
Good luck, I am in the same boat with looking for a replacement, in fact going to check out a possibility today.
Duane.
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