Re: 1985 AMC Eagle wagon build
Posted: Sun May 01, 2016 2:47 am
I still watch this thread,how much longer you think it will be before this is back roadworthy?
I'd like to get it in the car by the end of the summer. Not sure if it'll run, as I haven't decided on engine management. I'm leaning toward a megasquirt at this point, due to the decidedly *UN*wired nature of the car.ericjon262 wrote:I still watch this thread,how much longer you think it will be before this is back roadworthy?
So... that was a really dumb thing to say. Of course there's going to be a reason.The Dark Side of Will wrote: No reason I can't get the diff buttoned up next weekend
According to the old SAE handbook, all modern axles are known as 24-pitch. If the shaft had a 1-inch circular pitch diameter (the mid-point between the major and minor diameters), it would exhibit exactly 24 splines (or teeth). The distance between the centerline of adjacent splines remains constant, so as the diameter of the shaft increases, so does spline count. For examle, a 35-spline axle has a major diameter of 1,500 inches; a 40-spline axle is 1.708 inches in diameter.
The Dark Side of Will wrote: The input to the TH425 diff is 1.415" or so and 33 splines... *NOT* 32 as I conjectured.
According to the above, the pitch diameter for 33 splines should be 1.375". 1.415 is reasonable OD for 1.375 pitch diameter... I guess I could have my dad verify. I guess I need to price a female yoke for 33 spline shaft. Probably ought to check the spline count on the T-case output.The Dark Side of Will wrote:Interesting info on axle splines: http://www.markwilliams.com/schmaxles.aspx
According to the old SAE handbook, all modern axles are known as 24-pitch. If the shaft had a 1-inch circular pitch diameter (the mid-point between the major and minor diameters), it would exhibit exactly 24 splines (or teeth). The distance between the centerline of adjacent splines remains constant, so as the diameter of the shaft increases, so does spline count. For examle, a 35-spline axle has a major diameter of 1,500 inches; a 40-spline axle is 1.708 inches in diameter.