Rear gear questions

[richard10076]

I need to replace the stock gears on my '99, and was thinking about going all the way to a 3.08 since I'm only towing light. Anybody out there gone that far and want to advise
Thanks.

[Maintain]

I have heard of people doing that, however I personally wouldn't go THAT low unless ALL of my miles were hwy unloaded with smaller hwy tires on a 2wd.

Do you have a 2 or 4wd? If it's 4wd and you only need to replace the rear gears then you'd be best off sticking with stock gears so that you don't spend boooo-ku-bucks to change something you don't really need to.

[mschn99]

i think your gonna run into pretty big power problems at 308.........i would go no lower than a 355 if i was you.....

[Maintain]

I'll second the 3.55 if you really want to go lower and only have a 2wd...

[720Deere]

Well if you only plan on using your powerstroke to haul your date to the prom, the 3.08 gears may just work for you! Remember you are talking about the same gears that come stock in a Mustang that only weighs less than half what your truck weighs and most people like to swap them out to at least a 3.55 for performance reasons.

If you do any towing at all be it "light" or not, I would not go any further than a 3.73 in a truck. Most F-150s that have 3.55s are dogs and can't hardly get out of their own way. I have the 3.73 with 20" tires and when you compute the difference in tire height it brings my effective gearing real close to that of a 3.55. That being said, it is not the ideal setup for towing. Unless you have spent a few bucks on mods, the six oh has quite a few more ponies than a 99 7.3 and I'm telling you that a 3.55 is less than desirable with the extra power.

The bottom line is that it's your rig and you need to set it up to suit you, but if it were me getting ready to drop that kind of dough for a gear swap I would talk to a few people with that setup. It would be nice to be able to drive a rig with the same setup first.

[richard10076]

Guys
Wow, first time here, and inundated with logical information. Thanks a bunch, I really appreciate it.

Richard

[purduefarmboy460]

did you expect any thing less??

Welcome to PSD.org!!1

[tstroke]

i read a article about a 2 wheel drive with 308s geting 26 mpg but i dout you have much pulling power

[BlackSmoke00]

i was thinking about putting 4.88 in my 2000 F-250 im running a 6"lift with 37"tires and i have alot done to the motor what do you guys think should i do it or not

[tstroke]

find out what gear you need to stay at 70mph at 2000 rpm i dont no the formla. i found out any thing over 2000rpm sucks more fule. stay close to that and you will be fine. if you want a stump puller and not highway lower them and you will yank any thing just not much for speed.