First I've heard that was in this thread, not saying it's not true though.See, I keep getting mixed info. I'm pretty sure it's only the pinion that is 37 spline, not the axle shafts. But that's not confirmed.
Awesome info. Thanks. :beer:I just had one for sale a few weeks ago, no one bought it so I stuck different gears on it and shoved it in an older housing .
I wanted the bigger 37 spline pinion in my 2k 7.3 PSD but I didnt want the locker, I just wanted the regular old Ford factory locking diff .
The axle shafts are still 35 spline and it doesnt matter if you have the older style housing or the newer wider 05+ housing the axle shafts are the same length and still 35 spline .
The 37 spline pinion however WILL NOT go into any housing other than one that is machined out for the bigger pinion bearings due to a bigger pinion, its the same size as a Dana 80 .
So now my 1970 FJ55 has a nice wide 05+ sterling rear with the electric locker, I did it this way so the width would match the front 99-04 60 it will be getting .
No I have not wired the locker yet, it has only two wires so i'm gonna say its pretty basic, like off/on .
Sorry for being a newb on this - but how does having the same width front and rear axles increase the turning radius?That's not a bonus in my eyes. That increases turning radius.
From what I understand, it does have to do with the pivot point of the rear axle. Narrower rear end, tighter circle, wider rear end larger circle.Sorry for being a newb on this - but how does having the same width front and rear axles increase the turning radius?
The truck sort of pivots on the inside back wheel when turning sharply. Does moving that pivot 3" outward (a 6" wider rearend) make that much difference - or is something else going on?
Well yes, with a locker or limited slip I could see that, and I'm sure even with an open diff there is some effect. That being said, I don't think a few inches of width in the rear is going to be noticeable on a full size truck.It is part of the Ackerman angle theory. It has more to do with the front being wider than the rear, than having a narrower rear. At slow speeds, the front tires try to scrub as power is applied in the rear. Especially with a locking rear diff. As the front gets wider in relation to the rear axle, it has a larger advantage over the rear axles anchored position. It is much easier to maunver the front with steering input if it has a larger track width than the fixed axle. This principle becomes more true the slower your speed and the more resistance the rear axles have to turning independently.