I had a thought on the -715, are the lug nuts lefty-loosey on all four rims, or are the ones on the right side righty-loosey? I can't find any reference to it in the manuals, and I know some older trucks had the thread pattern reversed...
I had a thought on the -715, are the lug nuts lefty-loosey on all four rims, or are the ones on the right side righty-loosey? I can't find any reference to it in the manuals, and I know some older trucks had the thread pattern reversed...
I don't recall them being anything other than standard, lefty-loosey. At least on my truck! (stock)
-- Tim Taylor
All the lugnuts on my stock axled 715 are all lefty-loosey. I've never heard of having one side reverse thread. I wonder what the thought behind that was?
68 M-715
67 M-725
Some older Dodges I think had reverse threads on the passenger side to avoid the possibility of the lug nuts working their way off a wheel spinning the direction that would loosen them. At least that's how I recall them being on my old '71 Dodge Dart.
-- Tim Taylor
M715's have right hand threads (Normal) all around. M35's and M37's have right hand threads on the right and left hand threads on the drivers side. If you look at the end of the wheel stud, it will either be blank or have L or R stamped in it. Only the L ones need to be turned backwards.
I believe the thinking was that a loose lug will not work its way off against the rotational forces of a rim going down the road.
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Large trucks like semi's and even duces and 5 tons have left handed threads on the left hand side (drivers) of the truck. Yes the idea is that the nuts wont loosen with the wheel going the same direction. Maybe with large tires like that of duces, 5tons, and semi's that are generally not balanced the "wobble" could possible cause them to become loose? But the stock M715 will have regular or normal right hand threads.....Righty tighty.
You know maybe that's what happened to Brian S a few years ago...His large tires caused the nuts to loosen up....hmmmmm
Zone holster maker
Ok so Tim and I said basically the same thing at the same time...
Zone holster maker
I have a M101 Trailer w/ left-hand threads on the drivers side wheel.
I had a 1942 jeep that i snapped some off of the passenger side...changed over to all rt hand studs
Cars and trucks from the 30's and 40's(and often thru the 50's) commonly had left hand threads. My first project was a 40 Olds Series 80 and I never did figure it out. Spent the day trying to loosen those nuts without breaking the studs. Dad got home from work that night, walked in the garage and spun 'em off in two minutes...
Lots of large trucks, as mentioned, still do this AND I think Toyota trucks were still doing it in some applications in the 90's. Does it actually accomplish anything? Well...I never heard of any coming loose...
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