Tremor Front Diff Video!

[BigBoyToyz]

And here is part two!! (Added 4/24/21)

 

[6.7_Antimatter_LUST]

Interesting. According to this video the front diff engagement is dependent on drive mode, specifically only engaging in sand/snow in 4x4 low. I wonder if when in 4x4 hi the front diff engages more easily and/or in more modes than just sand/snow.

 

[hedge]

I'm no mechanic but I thought it was a clutch-style limited slip but I'd think that would be mechanical and wouldn't be affected by the modes. Your video seems to show that the limited slip is implemented via traction control... or maybe I have no idea what I'm talking about.

 

[ICT Tremor]

The way that reacts depending on mode pretty much says its a "limited slip" via the computer controlling wheel spin via the brakes. Which means calling it a "limited slip" is a stretch. A clutched limited slip doesn't have a brain to vary its application depending on a ECU mode. At least IMO.

EDIT: Others saying the same thing while I was typing this up.

I love my truck, but I'm not so sure if I ordered it again I wouldn't just skip the Tremor package. Seems like limited content for $4K after owning it for a bit and seeing stuff like this.

 

[Gingersnap155]

there is a true clutch pack LSD in the front diff a Dana trac lok. It is then manipulated further by the modes as the modes apply brakes to make the diff slip more or less. Similar to most awd systems these days.

 

[CityHunter]

Interesting. According to this video the front diff engagement is dependent on drive mode, specifically only engaging in sand/snow in 4x4 low. I wonder if when in 4x4 hi the front diff engages more easily and/or in more modes than just sand/snow.

He mentioned it worked in slippery mode as well. What isn’t confirmed is whether the front limited slip generates different degrees of intervention. While in this case only slippery and deep snow/sand modes generated enough intervention to pull him out in his test environment, it’s possible normal and rock/crawl modes would also kick in the limited slip with enough power delivery/spinning.

Count me in the “good enough” camp. Yeah, a mechanical locker would have been neat, but this can certainly be effective when needed, as we saw here. Additionally, the limited slip should offer some advantages over mechanical in unfavorable on-road conditions.

 

[thevol]

I have jacked the front wheels up and tested how tight the clutch in the lsd is...its not at all, most likely for safety reasons on ice etc. That video was interesting, I assumed the brake modulation would do more in rock crawl mode, very odd it doesnt. Would like to see this test with trail control and rock crawl mode to see if the computer would figure it out.

 

[DanMan583]

Just as a side note, the “Deep sand/Snow” mode also seems to give the most Power AND Throttle response, even is 2WD. It also holds the gears longer between shifts and allows the engine to rev much higher It’s like having a factory tuner, and is so much more fun to drive!!

 

[TexanTremor]

Also he kept the rear unlocked for the entire demo - the front LSD pulled it out without the rear locked. Seems like in deep snow sand mode it will in fact give enough traction if you just goose it enough.

 

[BigBoyToyz]

Hey guys, I'm the one who made the video. Just FYI... I did try the other modes and they did nothing. It did work well once they locked up, being that only the one front wheel had traction out of four. That one front wheel still pulled the entire truck up and out basically on its own. Oh... and please subscribe to my channel!

 

[Needatremor]

Great info on that video i was wondering what the front lsd would do in a pinch and for me thats pretty good with no locker engaged . Got stuck in much less of a situation with my 04 ram 2500 in 4 wheel drive with rear limited slip

 

[Guest2542]

Nice video.
My question is.....did you have the front hubs manually locked or still in auto?
If you didn't manually lock them, why not?

Just curious.

 

[CityHunter]

Hey guys, I'm the one who made the video. Just FYI... I did try the other modes and they did nothing. It did work well once they locked up, being that only the one front wheel had traction out of four. That one front wheel still pulled the entire truck up and out basically on its own. Oh... and please subscribe to my channel!

Appreciate the video and information. Could you clarify whether slippery mode was tested as well? You mentioned it working a couple times, but it’s possible you were referring to it and deep snow/sand interchangeably.

 

[BigBoyToyz]

Nice video.
My question is.....did you have the front hubs manually locked or still in auto?
If you didn't manually lock them, why not?

Just curious.

They were in auto. Would having them locked make a difference? I can try it again next time when I go out.

 

[BigBoyToyz]

Appreciate the video and information. Could you clarify whether slippery mode was tested as well? You mentioned it working a couple times, but it’s possible you were referring to it and deep snow/sand interchangeably.

Yes I did slippery and it didn't do anything.

 

[Guest2542]

They were in auto. Would having them locked make a difference? I can try it again next time when I go out.

I'm not 100% sure, but I think they might interact with the drive modes......which to me would make sense.
Unless they work off of needing a certain amount of wheel spin but I believe they are vacuum actuated in Auto mode.

In manual lock mode, that should take the vacuum actuation and drive mode input out of the equation.

If I'm completely off base here....anyone who knows for sure feel free to let me know.

 

[hedge]

They were in auto. Would having them locked make a difference? I can try it again next time when I go out.

As long as vacuum is being maintained there is no difference between having the hubs locked or not.

 

[Tx-Tremor6.7]

The way that reacts depending on mode pretty much says its a "limited slip" via the computer controlling wheel spin via the brakes. Which means calling it a "limited slip" is a stretch. A clutched limited slip doesn't have a brain to vary its application depending on a ECU mode. At least IMO.

EDIT: Others saying the same thing while I was typing this up.

I love my truck, but I'm not so sure if I ordered it again I wouldn't just skip the Tremor package. Seems like limited content for $4K after owning it for a bit and seeing stuff like this.

I realize the Tremor package is a $4K option, but when I priced two functionally equivalent trucks with Lariat Black, Lariat Ultimate, Hi-Cap Towing, the price difference was only $1400. This was due to the Lariat discounts and price difference between the F250/F350, so the "Tremor" items were well worth it for my use case.

When I sell my Tremor take-off parts in the next couple of weeks, it will be a wash for me. Plus, I get to keep the locking rear diff, dana LS front diff, tremor running boards, beefier skid plates, and extra drive modes.

EDIT: Thanks to the OP for explaining the axles and drive modes!

 

[Rich Pune]

Yes I did slippery and it didn't do anything.

Great video. Did you give the other modes the same amount of time/throttle to engage as sand and snow?

 

[CityHunter]

I realize the Tremor package is a $4K option, but when I priced two functionally equivalent trucks with Lariat Black, Lariat Ultimate, Hi-Cap Towing, the price difference was only $1400. This was due to the Lariat discounts and price difference between the F250/F350, so the "Tremor" items were well worth it for my use case.

When I sell my Tremor take-off parts in the next couple of weeks, it will be a wash for me. Plus, I get to keep the locking rear diff, dana LS front diff, tremor running boards, beefier skid plates, and extra drive modes.

EDIT: Thanks to the OP for explaining the axles and drive modes!

Yep, it was a no-brainer in my case as well, and I don’t plan on selling any takeoffs any time soon. This video shows the truck doing exactly what it’s supposed to do when in the correct mode for the given environment - I’d call that a positive result.