Series 1251 is a compact size found on lighter and import applications. A transmission yoke slides onto the splined output of the transmission or transfer case and carries the front joint of the driveshaft.

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1
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Splines count & Dia
Center U Joint to End
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1203-24 transmission yoke
$59.83
Max:
Min: 1
Step: 1
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1251
22/24 X 0.995
5.875
1.038
1.375
NISSAN- SUBARU
1203-18 transmission yoke
$59.85
Max:
Min: 1
Step: 1
Add to cart
1251
18 X 0.800
4.875
910
1.178
NISSAN- SUBARU
1203-24S transmission yoke
$69.62
Max:
Min: 1
Step: 1
Add to cart
1251
22/24 X 0.995
4.750
1.000
1.375
Nissan
1203-26S transmission yoke
$73.92
Max:
Min: 1
Step: 1
Add to cart
1251
24/26 X 1.115
6.000
1.125
1.375
Nissan
1203-26 transmission yoke
$76.87
Max:
Min: 1
Step: 1
Add to cart
1251
24/26 X 1.115
6.000
1.250
1.495
Nissan

Count the splines on the output shaft and measure across the spline tips. The same series serves many different spline configurations.

The transmission yoke is the driveline component that engages the gearbox output spline. On many vehicles it also acts as the slip member, allowing the shaft to change length as the suspension moves, in which case the seal surface and the yoke length both matter alongside the spline data.

Series determines the u-joint the yoke accepts. Spline count and spline diameter determine which output shaft it will actually go onto. Both have to match.