Dissable gear lockout
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Trailering
Joined: Sep 2005
Posts: 24
Likes: 5
From: Reykjavik Iceland
Dissable gear lockout
I have a 2024 F350 SD 4WD with the Godzilla and 10R140 auto. I need a tuner that can disable the gear lockout in Low. I would like to be able to use the 8,9, and 10 gear
in transfercase Low. Has anyone a solution to this ?
in transfercase Low. Has anyone a solution to this ?
More Turbo
Joined: Aug 2025
Posts: 712
Likes: 392
Would you like a quote for a transfer case replacement now? Or later? Going to need a driveshaft too. And hopefully Ford didnt run the main wiring harness next to the transmission like Ram does. $12,000 repair bill on that Ram, for doing what youre thinking of.
Switch back to 4hi.
Switch back to 4hi.
Last edited by Midwest87; Nov 8, 2025 at 02:39 PM.
Cargo Master
Joined: Apr 2018
Posts: 2,414
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Would you like a quote for a transfer case replacement now? Or later? Going to need a driveshaft too. And hopefully Ford didnt run the main wiring harness next to the transmission like Ram does. $12,000 repair bill on that Ram, for doing what youre thinking of.
Switch back to 4hi.
Switch back to 4hi.
Stretching my head. Trying to figure out why somebody would want to try that?
OP, What are you trying to accomplish?
Logistics Pro
Joined: May 2021
Posts: 4,030
Likes: 2,341
Maybe he wants to leave his truck in 4Lo full time when needed and access gears 8-10 since he is in Iceland?
Cargo Master
Joined: Apr 2018
Posts: 2,414
Likes: 1,124
That would make sense then.
More Turbo
Joined: Aug 2025
Posts: 712
Likes: 392
You can only put so much into the low range of the transfer case.
Consider portal axles, geared right, instead. Itll cost the same in the long run.
Consider portal axles, geared right, instead. Itll cost the same in the long run.
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Trailering
Joined: Sep 2005
Posts: 24
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From: Reykjavik Iceland
I got the 3.73 diff ratio. In Low (2.71) doing 55 miles I have motor in 7 gear doing rev. 5.630, but would have 3.560 rev. in 10 gear if that was available.
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Thread Starter
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Trailering
Joined: Sep 2005
Posts: 24
Likes: 5
From: Reykjavik Iceland
So I know a little bit about this.
Last edited by thado; Nov 8, 2025 at 06:20 PM.
Cross-Country
Joined: Oct 2024
Posts: 57
Likes: 24
From: Off grid
I understand completely why anyone would want to be able to manually control low range gears at least up to 5th or 6th gear. 5th or 6th in L I don’t remember which, is equal to 1st gear H. I’ve run 4x4s most of my life. When on desert roads or any other back country non-maintained road, which can become very technical very quickly, I’d be in L most of the time, thru the entire gear range, 1-4 then in later years 1-5, It’d be of great benefit to be able to do that with my 350. For those that think the Borge Warner chain driven T case would blow up, I’d like you to explain just how that would happen.
Cross-Country
Joined: Oct 2024
Posts: 57
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From: Off grid
Logistics Pro
Joined: May 2021
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Ford designed the ESOF to switch out of 4Lo above 62mph ot 100 km/h, at least in the prior gen SDs, not sure what the limit is now, but if OP is running 55mph or 88 km/h, it's well below Ford's design limit. Plus if he is running it in cold conditions, what we consider "extreme condition" for the xfer case in CONUS doesn't always apply there.
Last edited by twobelugas; Nov 8, 2025 at 08:38 PM.
More Turbo
Joined: Aug 2025
Posts: 712
Likes: 392
Why not just switch back to 4hi? Sounds like laziness to me.
Good luck to yall. I wouldnt do it. But I'd love to be your tansmission tech. Easy $$$. Its kinda hard to saywhat the actual failure point was. When the entire xfer case, trans, and diveshafts were comfetti. Most of which was still out on the trail.
Good luck to yall. I wouldnt do it. But I'd love to be your tansmission tech. Easy $$$. Its kinda hard to saywhat the actual failure point was. When the entire xfer case, trans, and diveshafts were comfetti. Most of which was still out on the trail.
Last edited by Midwest87; Nov 9, 2025 at 06:05 AM.
Hotshot
Joined: Jun 2003
Posts: 12,354
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From: SW VA
Fear mongering. Show me all the blown up transmissions and t-cases from 2017+ SD's from this. I'll wait.
Input speed to the T-case is the same whether running 90+mph down the highway in 2WD, or running 40mph in low range. The T-case is designed to handle the output of the HO diesel.
Traction is the limiting factor.
Input speed to the T-case is the same whether running 90+mph down the highway in 2WD, or running 40mph in low range. The T-case is designed to handle the output of the HO diesel.
Traction is the limiting factor.
Mountain Pass
Joined: Jul 2020
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