70Duster340
Well-Known Member
As far as manual steering boxes are concerned, are all the manual steering box shafts the same? I've seen small shaft and large shaft pitman arms listed.
Thanks
Thanks
Steering shaft diameter
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70Duster340
Well-Known Member
Nobody?
A/B/E body manual steering boxes all use the small spline diameter.
In fact, all manual boxes for cars used the same small spline manual box up until 1988. Only C-bodies and vans got a large spline manual steering box.
Way more info here…
Steering Box Info
70Duster340
Well-Known Member
Excellent info. Thanks
MyD750
'71 Duster 340 TX9
If this is on a 70 Duster, a great resource is the parts catalog available at mymopar.com (Parts Manuals – MyMopar) free download. Steering parts begin on page 699 of the adobe file. This answers most questions (that and service manual) but not all. I'm about to post my own steering for my 71 Duster.
70Duster340
Well-Known Member
Excellent, thanks
Dave999
Well-Known Member
The big block dart link suggests at the end that a manual big sector van box might facilitate a move from power to manual steering on a big sector car.
i belive that vans used a more of a "Cab Over" set up with a reversed linkage.
Basically every chrysler commerical vehicle wormscrew and ballnut i have seen has its thread cut reverse to what you need in a standard car.
that doesn't mean all of them are like that, but my investigations into cheap 16:1 ratio updates lead me to van wormscrews which were the right ratio, in many cases of managebale length at the spline, but wrong thread orientation
In which case the conversion would have had the wheels turn right when the steering wheel was turned left and vice versa great for clowns, not good for the rest of us
obvioulsy you have no such problem with sector shafts. you just need a manual or a power one for a car or a truck, and in the correct size for you case and pitman.
Dave
i belive that vans used a more of a "Cab Over" set up with a reversed linkage.
Basically every chrysler commerical vehicle wormscrew and ballnut i have seen has its thread cut reverse to what you need in a standard car.
that doesn't mean all of them are like that, but my investigations into cheap 16:1 ratio updates lead me to van wormscrews which were the right ratio, in many cases of managebale length at the spline, but wrong thread orientation
In which case the conversion would have had the wheels turn right when the steering wheel was turned left and vice versa great for clowns, not good for the rest of us
obvioulsy you have no such problem with sector shafts. you just need a manual or a power one for a car or a truck, and in the correct size for you case and pitman.
Dave
70Duster340
Well-Known Member
Yeah, that could be a little awkward,
Interesting. Not something I'd heard before but not something I ever looked into either.
But power to manual steering on a big sector car just requires the correct pitman arm for the swap anyway, and they're available. In fact, it's what allowed me to put 73+ steering linkage on my '71 Dart with a small sector power steering box. I just bought a 73+ manual steering pitman, because they have the small sector and the correct pitman arm orientation for the 73+ steering linkage.
Dave999
Well-Known Member
truck has reverse screw, but look how appealing the thread size is....!
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