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I looked through some previous posts about this, but wanted to see if there was some more directly related replies. I’m currently awaiting delivery of my 2023 F350 7.3 and considering a locker or limited slip for the front Dana 60. This truck will have a permanent payload of 3000lbs and spends a considerable amount of time off pavement for work. I’m considering either the Eaton elocker or TrueTrac. I’m really leaning towards the Truetrac, but want to know some opinions. Please ask questions if you need more info about the truck and conditions.
In my opinion I would want an ARB locker (for the front axle). This would allow me to lock it on demand ONLY when needed, unlocked it will be much more controllable in 4wd, but locked all the time in 4x4, it would be hard on the front end and in some cases harder to maneuver at higher speeds.
My only experience with a locking front axle is with our two door Jeep Rubicon and the front and rear axles only lock in 4LO. With the front locked in 4LO it gets hard to steer and can only be used limitedly.
so if that’s the case than what’s up with fords putting limited slip in the tremor package front axle?
I don't have experience with LSD in a front axle but from what I understand they aren't too obtrusive. Not like an actual locking differential, automatic or otherwise. I have been in rigs with an auto locker up front, like a Detroit locker, and it can be a hassle under certain driving conditions. If you were doing extreme offroading, rock crawling type stuff, I would go selectable locker, but I don't imagine that's what you intend to do with a Super Duty.
For what it's worth, here is what Eaton says about TrueTrac use up front.
I don't have experience with LSD in a front axle but from what I understand they aren't too obtrusive. Not like an actual locking differential, automatic or otherwise. I have been in rigs with an auto locker up front, like a Detroit locker, and it can be a hassle under certain driving conditions. If you were doing extreme offloading, rock crawling type stuff, I would go selectable locker, but I don't imagine that's what you intend to do with a Super Duty.
For what it's worth, here is what Eaton says about TrueTrac use up front.
Whatever is in the front of my tremor seems to work well for what I do. It seems to help a lot. I spend a lot of time on dirt forest roads in northern Wisconsin. The roads often get muddy or snow covered, sometimes both. My 2020 Tremor handles these roads far better than my 2016 super duty Fx4 did. I’m told it’s not a locker, but when I pulled out a few stumps I was getting all 4 to spin. This didn’t happen with other trucks I have had in the past. Typically only one wheel on each axle would spin.
I have an Eaton e-locker in the front of my '19 F350 4WD (factory e-locker rear), re-geared to 4.88's as using 37" tires. Haven't used the front locker yet as truck and custom composite camper been in the shop for other upgrades, but I can report back.
PS--I will say that if re-gearing, I'd highly recommend Nitro gears (what I'm using in front) over Yukon gears (what I'm using in rear--long story). Nitro is quiet, Yukon has some whine and minor vibration under decel (gears setup is near perfect so it's not an install issue). Installer said he's been seeing more noise from Yukon lately and he was really impressed with the Nitro so he was going to suggest more Nitro to his customers.
I believe Ford uses a helical gear style front limited slip. ETA: I was wrong on that, they use a clutch type LSD.
I plan to install a True Trac in the front D60 of my F350. I don't want a full time mechanical locker in a street driven truck and I've had issues in the past with ARB's on my rock crawlers, I'm probably the only one that has though it sounds like.
I've run a True Trac in the front on another vehicle and it will lock up both sides when needed, if not a slight brake application will get it to lock up if there is too little friction on one side or the other.
Whatever is in the front of my tremor seems to work well for what I do. It seems to help a lot. I spend a lot of time on dirt forest roads in northern Wisconsin. The roads often get muddy or snow covered, sometimes both. My 2020 Tremor handles these roads far better than my 2016 super duty Fx4 did. I’m told it’s not a locker, but when I pulled out a few stumps I was getting all 4 to spin. This didn’t happen with other trucks I have had in the past. Typically only one wheel on each axle would spin.
yea the tremor has a limited slip front axle, my understanding is it’s comparable to a detroit truetrac, but maybe fords own. I guess you’re exactly the guy I was hoping answered my post. I hear lots of guys say don’t put a limited slip in the front because you won’t be able to steer and others that say the opposite, all while ford makes a truck with one from the factory. I mainly wondered what it would be like on snow covered or snow packed roads which I’ll be driving on between job sites. I’m in northern Michigan.
The Tremor comes with the clutch style Dana limited slip. Not worth having imo.
I'd go with the True-trac. I have one that's waiting to be installed on the 2017 I have, but I have a True-trac on my Ranger rear axle and it works extremely well.
It's important to note to get the right carrier break and make sure the differential is for a front axle when ordering. True-tracs have biased cut helical gears and there is a difference between front and rear applications.
The Tremor comes with the clutch style Dana limited slip. Not worth having imo.
I'd go with the True-trac. I have one that's waiting to be installed on the 2017 I have, but I have a True-trac on my Ranger rear axle and it works extremely well.
It's important to note to get the right carrier break and make sure the differential is for a front axle when ordering. True-tracs have biased cut helical gears and there is a difference between front and rear applications.
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