6 speed tranny conversion?
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5th Wheeling
Joined: Aug 2019
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6 speed tranny conversion?
Totally hypothetical question, would it be logical to do a 6 speed conversion on a 2004 - 2008 f-150 with the 5.4 triton? I have actually found some companies that make 6 speed trannys to replace the 4 speeds in these trucks. I’m curious if this would be as great of an improvement as it sounds or not? I feel like 2 extra gears would be very nice on my ‘04 5.4 triton.
FTE Community Team
Joined: Jan 2019
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Depends on the current transmission I guess.
Also depends on whether the current transmission is any good or not . . . or if you just want it anyways.
Yes the extra two ratios make things better. Compared to your four-speed, you sort of end up adding a ratio lower than first, another between second and third, and another between third and overdrive. Reverse is lower too.
Also depends on whether the current transmission is any good or not . . . or if you just want it anyways.
Yes the extra two ratios make things better. Compared to your four-speed, you sort of end up adding a ratio lower than first, another between second and third, and another between third and overdrive. Reverse is lower too.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,722
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From: SE Florida
You'd need to adapt a later PCM. That will take a wiring harness, probably more sensors, and maybe a lot of changes to the engine to make it work with the new PCM. This is NOT a swap for an amateur. It's nearly impossible for a pro.
Hotshot
Joined: Feb 2004
Posts: 10,806
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From: The Shenandoah Valley
A 6 speed and the lower 1st & Reverse are needed behind the 5.0, but the 5.4 makes great low end as is. I know the 5.0 makes great upper rpm power, but it lacks low end grunt. There are better ways to spend time & $$$.
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Transfer case?
What about a transfer case gear swap? I'm not sure about the gear ratios in the stock transfer case, but giving it a lower ratio in 4 low could only make it more capable off road (rock crawling).
I'm guessing the stock transfer case ratio in 4 Low is something like 2.7:1. It's be nice if we could swap to a 4:1 in 4 low, and not have to mess with the stock rear end (if your not running extra big tires).
I'm guessing the stock transfer case ratio in 4 Low is something like 2.7:1. It's be nice if we could swap to a 4:1 in 4 low, and not have to mess with the stock rear end (if your not running extra big tires).
FTE Community Team
Joined: Jan 2019
Posts: 10,739
Likes: 1,497
What about a transfer case gear swap? I'm not sure about the gear ratios in the stock transfer case, but giving it a lower ratio in 4 low could only make it more capable off road (rock crawling).
I'm guessing the stock transfer case ratio in 4 Low is something like 2.7:1. It's be nice if we could swap to a 4:1 in 4 low, and not have to mess with the stock rear end (if your not running extra big tires).
I'm guessing the stock transfer case ratio in 4 Low is something like 2.7:1. It's be nice if we could swap to a 4:1 in 4 low, and not have to mess with the stock rear end (if your not running extra big tires).
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Dieselguy89
1997 - 2003 F150
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May 3, 2008 08:28 AM