Discussion in 'A Body: Duster, Valiant, Dart, etc' started by moparjimh, Feb 25, 2019.
On a 69 Valiant, what is the wheel pattern size(6 cly).
5x4", doesn't matter 6 cylinder or V8, disc or drum brakes. All A bodies used that bolt pattern (except the Hemi ones) until sometime around 1972 or so, when disc brake A bodies went to the 5x4.5" bolt circle and the drum brake cars stayed with 5x4"
Thanks Thats what I thought too, friend says other wise. I get a Twinkie for that.
Disc brakes on a 1972 Demon 340 were 5x4 as well. So it had to be after that.
Yes, all A-body 8.75 axles are 5 x 4. They started useing E-body disc brakes in 73 with 5 x 4,5 pattern.
Are the new charger and 300 the same pattern as the 70's C bodys?
No. Some people consider them "close enough" and use them. To each their own, but I would not run them.
The old C and B body cars were 4x4.5" which is the same as 5x114.3 mm.
The new L based cars are 5x115 mm.
The older Intrepid type 300's were 114.3 which is 4.5"
It seems the metric "part namers" had more authority than the inchers!!
Especially being several later model Japanese cars also have the 5 x 4.5" (114.3 MM) bolt pattern. Note that hub diameters, width of rim as well as offsets can vary...........a lot but still.
Somehow, I can't picture Chrysler Engineers discussing an ideal bolt circle and coming up with 114.3 mm.
I'm positive they converted 4.5" to mm for some other reason.
Probably for the same reason that many of the traditional Detroit Three plus AMC manufacturers changed over from SAE to metric numbers when discussing the 318=5.2L, Chevy 350=5.7L, etc, never mind that most of the fasteners on those engines were still USS/SAE threads till the end.