2001 F-250 5.4 Zf5 : Final Gear and Tire question.
Thread Starter
|
5th Wheeling
Joined: Feb 2023
Posts: 28
Likes: 1
2001 F-250 5.4 Zf5 : Final Gear and Tire question.
2001 Ford F-250 5.4 zf5 4wd. Currently Running 315” Mudgrapplers on stock gears 3:73s.
It is my daily driver and I’ve had it on the road probably 6-8k highway miles alone over last 6 months. And power/mpg/towing , Have been pretty rough since the 315”s as you’d imagine so I’m needing something different.
Im on 2” level kit and I am leaning towards a 295/75/16 toyo at3. Along with it I want to Regear. The truck will mainly be commuting and highway driving, occasionally towing.
Please tell me your thoughts and opinions on both gear and tire size from yalls experience what would be most optimal, for what I want out of it thanks in advance ! Any additional questions also let me know.
It is my daily driver and I’ve had it on the road probably 6-8k highway miles alone over last 6 months. And power/mpg/towing , Have been pretty rough since the 315”s as you’d imagine so I’m needing something different.
Im on 2” level kit and I am leaning towards a 295/75/16 toyo at3. Along with it I want to Regear. The truck will mainly be commuting and highway driving, occasionally towing.
Please tell me your thoughts and opinions on both gear and tire size from yalls experience what would be most optimal, for what I want out of it thanks in advance ! Any additional questions also let me know.
Last edited by SebastianRMFC; Jun 1, 2026 at 09:05 PM.
Cargo Master
Joined: Apr 2012
Posts: 2,021
Likes: 524
From: Bottom Of Pikes Peak
are you sure it's your tire size that has effected your fuel economy?
while I have 4:11's and 315's with a 7.3. I thought the 315 were effecting my mileage. so I put my truck back to stock height and the little 32's....made zero difference
you will never get your money back from re-gearing...and i don't think it would help any in this situation, but I'm no expert
while I have 4:11's and 315's with a 7.3. I thought the 315 were effecting my mileage. so I put my truck back to stock height and the little 32's....made zero difference
you will never get your money back from re-gearing...and i don't think it would help any in this situation, but I'm no expert
Lead Driver
Joined: Jun 2006
Posts: 5,665
Likes: 986
From: Near Yosemite CA
Mine's a bit heavier, being an Excursion, I went to 5.13's with 315's, the lil 5.4 needs all the help it can get, best few tanks were 18-19's running at 63-65, which I've found is pretty consistent with most of my trucks, once you break 65-ish the mileage drops quickly.
I'm super pleased with the 5.13/315 combo, yeah, I know I'll not recoup the costs of the gear change, but having it move off the line like it does and not having to constantly have your foot in it, well worth it, lot's will go to 4.88's, I almost went to 5.38's.
I love your combo of the 5.4 and ZF5
I'm super pleased with the 5.13/315 combo, yeah, I know I'll not recoup the costs of the gear change, but having it move off the line like it does and not having to constantly have your foot in it, well worth it, lot's will go to 4.88's, I almost went to 5.38's.
I love your combo of the 5.4 and ZF5
Cargo Master
Joined: Dec 2015
Posts: 2,919
Likes: 510
Mine's a bit heavier, being an Excursion, I went to 5.13's with 315's, the lil 5.4 needs all the help it can get, best few tanks were 18-19's running at 63-65, which I've found is pretty consistent with most of my trucks, once you break 65-ish the mileage drops quickly.
I'm super pleased with the 5.13/315 combo, yeah, I know I'll not recoup the costs of the gear change, but having it move off the line like it does and not having to constantly have your foot in it, well worth it, lot's will go to 4.88's, I almost went to 5.38's.
I love your combo of the 5.4 and ZF5
I'm super pleased with the 5.13/315 combo, yeah, I know I'll not recoup the costs of the gear change, but having it move off the line like it does and not having to constantly have your foot in it, well worth it, lot's will go to 4.88's, I almost went to 5.38's.
I love your combo of the 5.4 and ZF5
For 295s I'd do 4.88. If 315 is ever in your future, 5.13 is awesome.
Don't even bother figuring mileage. With a full-size truck, V8 or V10, big rubber and even a mild lift ..... it just takes what it takes. Worrying about mileage is just not realistic with a gas engine doing truck work.
Please don't do something dumb like go from 3.73 to 4.10. Complete waste of time and money. Go big or go home.
Thread
Thread Starter
Forum
Replies
Last Post
