pitman arm

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Mopar Al

Mopar Al

MOPAR AL
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Can someone tell me the sector size of a 73 Dart power stearing pitman arm. Thanks, Al
 
BIG-B-Barracuda said:
Steering Box Info
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The compatibility problems with different boxes largely boils down to output shaft, or sector shaft size. First, there are two sector sizes, simply known as large or small sector. The large sector, just above the splines as it exits the housing, measures 1.22". The small sector measures 1.11".

62-76 A-bodies, 62-72 B-bodies, and 70-74 E-bodies all used the same manual box. Most of these boxes used bushings throughout, however, the B-body V-8 units were built for more abuse and used bearings internally instead of the bushings.
All manual boxes used a small sector shaft with the exception of C-bodies and vans to 1988. The big cars and vans used a large sector, presumably for added strength. It's also assumed these boxes used bearings instead of bushings.

Power boxes before 1973 were mostly small sector. I havent been able to find evidence of large sector power boxes before then. From 1973 to present, all power boxes were large sector. There is very little physical difference in power boxes except for the input housingfor the lines - the shape of this housing changed through the years, and through the various models, but all the input housings are interchangable.
 
73 PS Would be the large sector 1 1/4"

Thanks
James
 
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