1500 @ 60 mph sounds about right. I think what J-brew was saying is that you don't want to go much over 1900rpm on the highway because your fuel milage will suffer. And unless you are going to increase your tire size drasticly like going from a 32" to a 35" tire you might not need to regear like Str8t said. You dont tow a great deal but you still tow. With that being said a lower gear ratio say a 4.10 or a 4.30 will wake your truck up in the city and might actually increase your fuel milage, you will probably loss some on the highway though. You might want to try a custom tuner first a bit less money and may give you just what you are looking for. Good luck

 

Mine cruises at 1900 @ 70mph, I have 3.73 gears with a 4.6. My truck sux trying to tow anything over about 1200lbs until I get on flat terrain which is kinda hard here in east Texas...lol

 

I have the exact same tire size/gear ratio and I dont feel a need to regear. I have a 5.4 though..

 

the reason i said i wouldnt regear is becuase he never mentioned bigger tires later on, never said anything about lack of performance, he drives on the highway mostly so low rpms are key.

not to mention i drove on 35's with 3.55 gears for almost 4 years and could still pull 15MPG.

but if OP wants new gears, i have a break down of his RPM's at 60MPH

4.10's=1750
4.30's=1840
4.56's=1950

pick your poison....

 

Right, I pulled a car hauler for years with that truck. The trailer alone was 1900 lbs lol. Loaded, I was right around 3000 rpm from state to state. She really like the fuel then,- 8-10 mpg, but pulled exceptionally easy and well, the way I was set up. Gearing wasn't an issue. A 3/4 or 1 ton would have been ideal, but couldn't warrant another truck when this one did the job.

Mileage is usually close to 16 empty, except on the turnpike going across Ohio. It's flat for one thing and speeds on the pike are about 10 mph less. Could get close to 20 mpg cruising just over the limit empty. No other state tho, just Ohio. PA forget it lol.

 

Yea, he did mention over-sized tires. 285's I believe. Those are around 32's or 33's right ? So... - With the 4six, it would probably cruise the e-way alright and tow much better w/4:10's, if that was the case. 4:10's in the city would definitely benefit THAT V8 for obvious reasons. It might just be able to get out of the fricken way..Uknow ?

My opinion anyway.

 

yeah but 285's really arent that big, i had them on my old 97 f150 with the 4.6 5spd and it drove just fine.

i would go with 4.30's if he drove in the city.

 

4,10s with those tires should put him at about 2100, at 70 mph. I just regeared my expd to 4,10s. Just got them broken in so I haven't been able to run highway with cruise. Around town mpgs are up about 1 TO 2 mpg. I am running 285_70_17s,so almost size tire as op.

 

Sorry, I'm a little stuck... So do i regear?

 

Sorry, I didn't see the second page...

 

We can give you all the advice and info that you need, but its your decision to do it.

 

I used a hypertec power programmer and recalibrated the hearing to the stock 3.55 gears. I guess they don't program the trucks right when they assemble them because it made a pretty nice difference that even my wife noticed when she drove the truck.

Also, you guys mentioned a 5four, what do you think about a swap with a Harley Davidson supercharged 5four? Is it easy to do? And what do I need to do it?

 

You've opened a can of worms now. Just about everyone in here will tell you to swap to a 5.4 and supercharging will be iceing I'm going to have to let others talk you through the swap though. You might want to pose your question about the swap to the supercharge forum, twinscrewed, fatherford, ironsin, str8t, tarajarme and several others are more than willing to help and a couple of those guys are making crazy power. Good luck and keep us posted

 

I never thought you would ask


https://www.f150online.com/forums/su...ap-n-f150.html

 

Told you... I'm gonna sit back and watch now