i just installed 31" tires on my truck. i want to install now 4.10 gears to enhance performance. has anyone done this? and will my mpg go down? thank you for any help.

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99 xlt sc,4.6 2w.d.,gibson catback,superchip,airaid,rsx shocks,hellwig sway bar(soon to be removed),3" front lift.

 

Ask Neal.
He has done this and is very happy with it last I heard.

 

weck: Do tell about the gear swap. I haven't read anybody's post on installation of these gears (create a new topic if you want - if you haven't.) You know, how much, bought where etc...

 

I run 33's with 410's and it works quite well. your speedo will be a little faster than you are actually going. mine matches to within 1 mile so yours will a little faster. MPG change was minimal for me.

 

the gear swap took a full day down at the local tranny/gear shop. I started with 3.55's (I think) and went to 4.10's. Since I also had posi added as well the cost was close to $1500. gears are made by some outfit called auburn performance gears. The swap can be much cheaper I'm told by using the same carrier ($800 to $1000) and skipping the posi. I figured what the heck it's only money, so I went for the whole package.

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97' F150 XLT, 4 X 4, Auto,4.6L, Vortech Supercharger, jet-chip, Gibson Cat-back Duals, rear Posi, 4.10's, jet shift improver, Tonneau cover, Rancho RS5000's, 33's on American racing rims, Rhino brushgards and pushbumper, Dual Fosgate 800's w/Alpine head,
and musty smelling A/C system. Lookin for Chevy's to eat!!

 

WECK
There is a TSB on the stinkin air conditioner. All the dealer would do is spray some smell good in the vents.

Buy a can of Lysol disenfectant (your wife will know about this for house cleaning). After your days running around is over spray a liberal amount into each of the a/c vents an leave it alone. The next day you should have killed off much of the bacteria that causes the musty odor.

The dealer here sold my friend a can the size of about 4 ounces of some stuff to do the same thing. The Lysol will go a long way.



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97 F-150,4.6, Reg Cab, Flareside, Air Aid Kit, TransGo Shift Kit,
Superchips, Gibson Single Cat Back, ******* Bed Cover,
EGR Bug Shield, XL Full Length Running Boards,
Hellwig Rear Sway Bar, Hellwig 2500# Overload Springs

 

Drink some water and hold you breath

 

Regarding musty AC odor, picked this up from a magazine sometime back. Turn on your ac air, and from OUTSIDE of your truck, spray Lysol into the air vents so that it gets sucked in and this should take care of your problem.
I have not had a chance to try it out yet, since I just got my truck last week, but after getting a whiff of my AC odor, I am going to do it real soon. Also I have been checking out F150 online since last week and gotta say it is a goldmine with a lot of good info.

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98 F150, XLT, Red, 4x4, 4.6, SC, Flareside, ORP, Tow Package, cd chngr, cntr cnsl, alarm, 4chl Kenwood & Hifonics amps, Pioneer 6 1/2 bass tubes.
Future mods:
JL Audio 10' sub for center console, upgrade stock speakers, gibson exhaust, super chip, tonneau cover, brush guard, nerf bars, bug deflector, and EQ.
Said I wouldn't do it again, but what the heck, here I go, again!