So I've been looking around and I've noticed that when adding bigger heavier tires a lot of times you need to re-gear...I had 33" Nitto's before i bought these new 35" Nittos (by mistake) and i was just wondering if you guys think i need to re-gear knowing the following specs:

MY TRUCK: 2006 F-150 XLT 4X2 SUPERCAB 5.4 EFI V8 ENGINE
3.73 RATIO LIMITED SLIP AXLE WITH ONLY A DONAHOE 2WD FRONT COIL-OVER SHOCK SYSTEM ADJUSTED AT 2.5" IN HEIGHT

I haven't really been paying attention to the rpm gauge and i haven't really noticed a difference in the trucks performance. But the last thing i want is a transmission fix thats going cost me 1000+ or any fix at that....

Anything I should really be paying attention to or that you recommend THANKS!

 

Hmm, for me that's a tough call. With the 5.4 and 3.73 LS you're sitting decent. Do you tow and if so how often? Re-gearing is expensive, however, luckily for you it's only the cost of 1 axle. If you do re-gear, go with at least 4.56.

 

No no towing since I bought it and i don't intend do. I have moved and help moved and loaded it with some heavy stuff before.

And i don't off road - what do you guys call it "Street Queen"?

 

I do tow with my 35's and 3:73's with no issues!

Well am working on a new trans at the moment...

 

I'm on 35s with 3.73s right now and its not bad. I can regear for 1200 bucks but its not worth it at the moment.

 

x2^

 

If you don't tow anything (or romp on your truck)... You don't really need to regear.

If you do, 4.56 for sure.

 

I say yes. with 35s a 4.10 would be ideal but for the cost it isnt worth it.

unfortunatly there isnt any other gear choice between 4.10 to 4.56 . a 4.56 is almost to much rpms stock 32's runs 2000 rpms at 70 , with 35s your down to 1800 a 4.10 woulf get you ballpark at 1950 and 4.56s would jump it to 2150 we need

so a 4.10 would help bring back the stock like performance and keep the fuel economy , the 4.56 would help with tow and performance but pull the economy down

 

How did you get 35's to fit on a 4x2 with only leveling shocks?

 

Oh I did see some of your pics, tires are rubbing but how bad is it?

 

I ran 35" Nitto Mud Grapplers for a couple years with 3.73 gearing with no detrimental effects. I did have a dual exhaust, CAI, and Troyer Custom tuning so the truck seemed to have more power than it did stock with stock tires. The added benefit to the tuning was the speedo was correct. Lots of people run 35's without regearing. If you are only driving on roads, no towing, etc. you should be fine. If you intend on off roading a lot, you may want to consider regearing just to give you more power. Gas mileage on the other hand was around 14 mpg.

 

You could run with 35's. I've had them on for two years with 3.55 gears. Lucky for you, you Are 2wd and they make 4.30 gear set for you. If you ever decide to regear.

 

Pretty bad or it was, had some plastic trimmed and its fine now. Gas mileage has gone down though thats for sure.....Also I did a speedo check with the gps on my phone and its off by like 8mph.......

So i guess performance wise it is suffering quite a bit but I don't tow and i don't really off-road.......

I think with the 3.73 i should be fine thanks guys for the info.....

 

Hey guys...from what everyone says on here, almost everyone regears with 4.56 or 4.88s with 35's or bigger. However, a local lift shop owner here in Florida told me that as long as I'm not towing, my stock 3.73 limited slip will do fine with 37x13.50's. He also said it'd be fine as long as I'm not doing any serious offroading. Thoughts, Comments...?

 

Well, basically, if you baby your truck, and you're not constantly on the throttle, 3.73 should be good enough. A swap to 4.10's wouldn't be worth the hassle because its not that much of a change. Since you're 2 wheel drive, you could actually get 4.30's if you wanted (i'm pretty sure they have em for the rear differential, but not reverse cut for the front). Then the next step up would be 4.56 as the others have suggested. Really, i would just go for the 4.56's. You might lose a couple of MPH off your top end and run a bit higher RPM, but if you ever want to move up in tire size 4.56 can handle up to 38's decently.