Transfer case internals

[AlloyPony]

From what I have been told, on the F-150s with "auto" 4WD setting, only the Auto setting uses clutches to allow the center differential to slip. When the driver selects 4-low the transfer case actually becomes chain-driven and cannot slip.

This is different from how the 4-Auto transfer cases work on Ram and GM trucks. Those use clutches in ALL transfer case modes, and heat build-up in the clutches becomes a problem when using the truck in tough offroad conditions.

Does anyone know how the 6G Ranger transfer case will operate? Will there be options for a chain-driven (and therefore problem free) t-case?

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[CrustyNoodle]

Take a look at this thread where we discuss this very topic:

https://www.ranger6g.com/forum/threads/v6-diesel-and-petrol-4wd-system.7143/

 

[AlloyPony]

Thanks for the link. Unfortunately it's still a bit confusing.

From the article linked there: "4L (4X4 LOW) – Provides electronically or mechanically locked four-wheel drive power to both the front and rear wheels for use on low traction surfaces, but does so with additional gearing for increased torque multiplication. Intended only for off-road applications such as deep sand, steep grades, or pulling heavy objects. 4L (4X4 low) should not engage while your vehicle is moving above 3 mph (5 km/h); this is normal and should be no reason for concern. Refer to Shifting to or from 4L (4X4 low) for proper operation."

Electronically or mechanically? Which is it? Lol.

I know that the clutch system on the GM and Ram trucks is very problematic with overheating issues. I've experienced it myself just last year on a brand new Ram tugging on a stuck vehicle for less than 30 seconds. I'm hoping the Ford system relies ONLY on mechanical lock-up while in 4-low.

 

[Scooter]

Thanks for the info. I am alway's curious if the engineered systems work in the real world settings. Maybe finding out if the Ford system is better or worse then other manufactures.

 

[NC Spuds]

Thanks for the link. Unfortunately it's still a bit confusing.

From the article linked there: "4L (4X4 LOW) – Provides electronically or mechanically locked four-wheel drive power to both the front and rear wheels for use on low traction surfaces, but does so with additional gearing for increased torque multiplication. Intended only for off-road applications such as deep sand, steep grades, or pulling heavy objects. 4L (4X4 low) should not engage while your vehicle is moving above 3 mph (5 km/h); this is normal and should be no reason for concern. Refer to Shifting to or from 4L (4X4 low) for proper operation."

Electronically or mechanically? Which is it? Lol.

I know that the clutch system on the GM and Ram trucks is very problematic with overheating issues. I've experienced it myself just last year on a brand new Ram tugging on a stuck vehicle for less than 30 seconds. I'm hoping the Ford system relies ONLY on mechanical lock-up while in 4-low.

it’s both electronic and mechanical. The video in the referenced thread does a good job explaining it.

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