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804614 = 1966 numerical series, January 1966 production
174 = 174 inch wheelbase
W = Medium Blue
F600 = F600, 17,000 lbs GVWR
M81
M = Beige Woven Plastic and Beige Vinyl with Foam Cushion
81 = Cab and chassis vehicle
A = New Process model 435 four speed transmission
F8 = Eaton model 13802 two speed rear axle, 15,000 lbs capacity, 6.33 / 8.81 ratios
No front axle code. In MY '64 to '69 only optional axles are listed. Thus, standard Ford axle, probably at least 4,500 lbs capacity, no power steering.
17000 = 17,000 lbs GVWR
164 3800 = 164 Certified Net HP @ 3800 RPM
65 = Oklahoma City District Sales Office
No special order.
No special order means the truck was bought out of dealer inventory. This one differs from the typical in that it has the two speed rear axle. Dealer F600s tend to be low GVWR with single speed rear axles--at least many of the ones showing up here.
804614 = 1966 numerical series, January 1966 production
174 = 174 inch wheelbase
W = Medium Blue
F600 = F600, 17,000 lbs GVWR
M81
M = Beige Woven Plastic and Beige Vinyl with Foam Cushion
81 = Cab and chassis vehicle
A = New Process model 435 four speed transmission
F8 = Eaton model 13802 two speed rear axle, 15,000 lbs capacity, 6.33 / 8.81 ratios
No front axle code. In MY '64 to '69 only optional axles are listed. Thus, standard Ford axle, probably at least 4,500 lbs capacity, no power steering.
17000 = 17,000 lbs GVWR
164 3800 = 164 Certified Net HP @ 3800 RPM
65 = Oklahoma City District Sales Office
No special order.
No special order means the truck was bought out of dealer inventory. This one differs from the typical in that it has the two speed rear axle. Dealer F600s tend to be low GVWR with single speed rear axles--at least many of the ones showing up here.
thanks for the help that’s cleared up a lot only thing I haven’t had much luck in finding is a replacement brake booster/master cylinder. Would you have any recommendations?
Its frame mounted on the driver side I’ll look to see if I see any marking here’s a picture. Probably will need to get a replacement I took it apart and when I put back together the plastic cracked
Thanks all for your help I’ve made some progress on it for the brake lines cleaned out changed out the carburetor and water pump. I noticed that I have it on jack stands that in neutral it still tires the driveshaft until I push the clutch.
Is that normal?
Yes. In neutral with the clutch out, the input shaft turns when the engine is on. Internal friction and oil movement will make the guts of the transmission turn even though they are not mechanically linked. Sometimes they will turn even with the clutch in due again to friiction from the pilot bearing and the very small clearance between the clutch disc and pressure plate--it doesn't take much on a high mile rig for something to be just a little out of square or some material to be hanging out where it shouldn't be to cause a little friction.
Yes. In neutral with the clutch out, the input shaft turns when the engine is on. Internal friction and oil movement will make the guts of the transmission turn even though they are not mechanically linked. Sometimes they will turn even with the clutch in due again to friiction from the pilot bearing and the very small clearance between the clutch disc and pressure plate--it doesn't take much on a high mile rig for something to be just a little out of square or some material to be hanging out where it shouldn't be to cause a little friction.
ok thanks. What oil would you recommend for the transmission and rear diff?
I had started to post this link earlier, then realized that both the OP's trans and diff. are different than the one's I'd researched, and thought better of sticking my neck out. The Clarks definitely use those specs, and the Eaton 16xxx diffs, but IDK about the Eaton 13xxx or the NP435, and I decline to go down that particular rabbit hole for a '66, as I don't own the docs for that year.
It's a reasonable guess that Ford standardized their heavy lube specs across the various gearboxes and diffs, but until someone does the research for that year, that's all it is.
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