The BA 10/5 is a light duty five speed transmission.
It looks similar to the AX-15, but smaller and it is manufactured
by Peugeot in France. The input shaft is 1 1/8" 10 spline and the
output shaft can be 21 spline or 23 spline.
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Drivers side. Note "SIMI" and the number 3.28351 cast
in the side.
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From the front with the bell housing removed. Note "SIMI"
and the number 3.2839 cast in the front.
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The passenger side. Note the cool detail shots David got.
The "YJ" in the plug and "SIMI" and 3.2835 cast on the side.
The light square area is the build date tag riveted to the side.
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A top view.
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The passenger side.
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Here is a driver's side shot of an
AX-5
for comparison. The AX-5 has
regular ribbing on the drivers side and it uses a one piece
cast aluminum case. The BA 10/5 uses a two piece cast aluminum
case that is bolted together at the top and bottom.
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Engine side of the bell housing.
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Transmission side of the bell housing.
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Usage
The BA 10/5 and the Aisin AX-5 were used in all Wranglers from
1987-mid 1989. It was also used in Cherokees (XJ) and Comanches
(MJ) with the 2.8L V6, 2.5L I4, and 4.0L I6 from their introduction
until 1989.
| Transmission | 1st | 2nd | 3rd | 4th | 5th | Rev |
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| BA 10/5 | 3.39 | 2.33 | 1.44 | 1.00 | 0.79 | N/A |
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Contributors
Photos courtesy David Moulton.
