Original Message
T10 Speedometer Problem
By Dunk Campbell - 09/07/2005 9:40:30 AM; IP 69.69.251.106
We are having a problem with a Borg Warner H1 T10 4 speed transmission. We were told that it was from a 1966 Mustang.

We have installed it in a 1966 Mustang coupe, that formerly had a 3 speed installed. The transmission fits and operates fine, but ...

We have no speedometer operation.

We had installed a new speedometer cable and driven gear, and removed it from the transmission. The speedometer needle deflects when we spin the driven gear on the new cable. We can see the internal speedometer drive gear, and it is turning when the transmission is in gear. We suspect that the problem is that the driven gear is not meshing with the internal speedometer drive gear. The driven gear is about as large as possible to still fit into the transmission, so we think the drive gear is undersized.

We removed the internal drive gear, and find it is white nylon, 6 tooth, with an ID of approximately 1.25", and an OD of approximately 1.925".

We have found replacement T10 four speed drive gears in various Mustang parts house catalogs, but they all have an ID of 1 - 3/8", which leads us to believe that this might be a Falcon Borg Warner T10 transmission.

Anyone have any ideas where we can locate a correct speedometer drive/driven gear combination for this transmission?
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T10 Speedometer Problem -- Dunk Campbell, 09/07/2005
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