Gvellas
Well-Known Member
- First Name
- Greg
- Joined
- Oct 30, 2021
- Threads
- 1
- Messages
- 67
- Reaction score
- 74
- Location
- Fernley, NV
- Vehicle(s)
- 2022 Gladiator
- Occupation
- Electrician
You ever get your swap going or done?I'm glad to hear you are happy with it. I'm looking forward to mine.
It isn't really important offroad for 99% of people other than very picky rock crawlers. It theoretically matters on road only during tight turns with enough velocity to cause a loss of stable turning. It is about making sure the tires stay in perfect contact with the surface below when you need them to without scrubbing... during a turn when you are counting on not slipping. For most of us jeepers, that means onroad in wet/icy/snowy conditions when we want to be able to make a decent turn without our axles being predispositioned to scrub tires at higher steering angles, making an already risky turn worse.
I'm not too worried about it. These axles never have perfect ackerman angle, since that is related directly to wheelbase and front axle width. The same axle and knuckle is used in multiple configuration lengths of superduty from shortcab/shorted to supercab/longed.
Ackerman, from what I understand, is a mechanical and positively variable inclination of steering angle of the inner front tire relative to the outer front tire. Driving straight ahead, both tires are parallel. As you turn one way, with ackerman, the inner tire will increase in turning angle relative to the outer tire. The harder you turn, the more the inner tire is turning tighter than the outer. If you were to plot the delta in turning angle between inner and out front tires against overall turning angle it would be a rising line from left to right as overall steering angle is increased. I don't know if it would be approximately linear or not, but you get the idea. The point is, this delta of turning angle between tires is only ever perfectly valid for one particular wheelbase and front axle width. Ford/spicer likely designed the acherkman for the d60 to be close to perfect for the most common truck configuration they sold, and were happy to use that ackerman angle across all of the other configurations as well.
It's not a case of you either have it or you don't. It's variable. You have some ackerman, it just likely isn't perfectly setup for our JTs, which is probably just fine except in extreme cases such as a 50mph turn in snow or something. I think just being cognizant of the concept and how the axle might perform is enough to mitigate any risk encountered. So long as it drives good.
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