I would like to know if the Lightning trans is different from the one in a reg F150 with the 5.4L. If it is different does anyone know what the difference is? I'm looking for componentry differences, not "it's built to take higher torgue". The reason I ask is that I am mulling over in my head the possibility of a KB supercharger and would like to make sure I have a trans that can hold up and rework if need be. Thanks

 

I know the L's have a 4r100 similar to the diesel tranny and I think the regulars have a 4r70.

 

Your 4R100 dwarfs a regular F150s transmission in every way possible. Maybe Gregg will chime in??

 

The 4r100s Heavy Duty varsions only come in Lightnings Harleys and Superdutys f250s and 350s I was told.....

 

Most 150s have the 4R70W or 4R75 now.

The "regular" 5.4 model 4R100 (there are several for that motor) has 3 pinion planets all the way through, the L model has 6 gear pinions in a cast iron carrier in the forward and reverse, 4 in astel carrier for the OD. The L has a unique accumulator. Mostly the L is the same as either a deisel or V-10 in most places, but is the strongest non-PTO gasoline 4R100 ever built, the PTO is essnetially the same as a Lightning, the L converter is the v-10 model. A Lightning would proly go through a regualr Superduty 5.4 model tranny pretty quick, and is stronger than the V-10 model most places.

G

 

I'm also interesting in the original question. ...what are these things good for? for instance, what is the typical/average threshold? thx

-Mike

 

Mr. Ftech,

Question for you then. You talk about the 4r100 as mounted to the supercharged engines. I have an 01 Harley Davidson F150 with the 4r100. This is obviously a non supercharged engine. Is the tranny the same or not then. I've asked before and was told the FT valve body is the same across all of them. Is mine a lite duty 4r100 or what?

Thanks

 

You have a much lighter built 4R100. The one you have has a 3 gear planet in an aluminum carrier in both the forward and reverse, and a 3 gear OD planet in an aluminum carrier. The L has 6 gear cast iron planets in the forward and reverse, and 3 gear aluminum carrier for OD. Also, your accumulator is set up differently (a 2C will fix that) and you have a 4 bolt converter without brazed impeller and turbine, the L has a 6 bolt with both brazed. The L has the SD driveshaft yoke which is a bigger piece of metal the then little one on the regualr 5.4.

G

G

 

Gregg, how long does it take for you to build a monsterbox.....PS did you get check yet it was left on your porch....Pete