Greetings Silverback!!

Just my opinion .... I would recommend that you opt for a lower gear ratio than 3.73 for your differential. If you currently are running a 3.55, moving to a 3.73 will give you a barely noticable difference.
I would look for 4.10's personally. I'd hate to see you spend all that money and then wish you'd gotten 4.10's.

Good luck!!

P.S. Look for Precision Gear or Richmond Gear.... these seem to be the most recommended.

Steve

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2000 4X4 Lariat SuperCab
5.4 Triton
Two-tone black on silver
All options except LS differential

MODS so far:

-Westin step bars (powder coated matte black)
-Lund bug shield
-Gentex electrochromatic rear view mirror
-Cabin filtration kit
-Superchip
-Stull Billet Grill
-Flowmaster Force II catback (series 50 SUV with duals out the rear)
-Line-X bedliner

MODS to come:

-K&N or AirAid FIPK kit
-Mickey Thompson Challenger 16" wheels with 295/75 BFG AT KO's
-4.10 gears (still thinking about this one ...anyone have any input?)
-LS diff or locker of some sort once they are available..
-A.R.E. LSII or Ford HarleyDavidson tonneau cover

1995 Eddie Bauer Bronco
1988 Mustang GT

 

I agree!

I had 3.55 with P255 on my last truck. When I put the LT246 on the new one, their added size was cancelled by the 3.73.

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Y2K™

Toreador Red, Keyless XLT SC SB 5.4L E4x4 4wDisc/ABS, 3.73LS, Skid, HD 7700# Towing, LT-245's on Chrome, Tube-Steps, Captain's, 6CD, Tonneau, named: "Nick"

 

Got a 97 F150 with a 3.5" suspension lift, 305/70/16's and a 4.6 with 3.55 gears...looking for a set of gears to give back some torque....3.73 I think would be good....anybody got a set for this truck?

 

Wont 4.10 give me to many R's making it a real B@!#$tch on the road? I live in So. California....If memory serves correct at 75MPH (acording to speedo which is off 5-6 mpg..so really it's more likely 80) I am taching only 2200RPM. I just want to make sure that my swap out doesnt end up hurting me in the end.

What are you thoughts gang?


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1997 F150 4.6L, Flare side,American Racing Baja 16X8's, Goodyear Wrangler's LT305/70/16's ATS, Flowmaster 50 series, 3" cat,3.5 Suspension Lift kit, Tinted Windows, Superchip, Rancho 5000's

 

Not with your bigger tires. It will be just about right where you were to start with before the tires.

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2000 F-250 Super Duty, SuperCab XLT, Oxford white with medium grey cloth captains chairs, 5.4L Triton V8 (260 HP - 345 FP Torque version!), 4R100 4 Speed Automatic Transmission, 4 wheel ABS, Deluxe Aluminum Wheels, Trailer Towing Package, Class IV Hitch, Reece load distribution system, Escort Sensor II Electronic Brake controller, Sure Stop towing skirt, "Westin" black powder coated step bars, "White-White" head lamps, Herculiner bed liner, ISSPRO Tranny Temp Guage, Excursion center console, Ford moulded mud gaurds, K&N Air and Oil filter, Amsoil XL7500 5W-30,Air filter minder.

 

I'm kinda in the same boat. I went from 255 tires to 285's. I've been looking at trying to get my low end back. I installed a Superchip, exhaust, and K&N air intake replacement kit. I didn't notice much difference. I've been asking around and I have three options. 1- Live with it. (NO WAY) 2- Go back to original tiers. (NO WAY) 3- replace the current 3.55 gears.(EXPENSIVE) I was told the 3.73 would not make much differnce at all. So far my best bet is the 4.10's. Some guys ever say theres a 4.30 available for the F150. A few guys said when they went to the 4.10's there mileage went up a tad. I called around Sacramento, CA area and was quoted from $1109.00 to $1400.00. I'm looking for the most reputable shop. Hope this helps a little.

 

My calculations based off of what Frank & Beans said puts me at a 3.87 gear needed in the rear. I know they make 3.73 and 4.10 how about 3.90's? I have a 4x2 so I don't have to worry about the front end like some members with a 4x4.....



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1997 F150 4.6L, Flare side,American Racing Baja 16X8's, Goodyear Wrangler's LT305/70/16's ATS, Flowmaster 50 series, 3" cat,3.5 Suspension Lift kit, Tinted Windows, Superchip, Rancho 5000's

 

Silverback,
Last time I checked, Ford didn't offer the 3.90 ring and pinion gear set. Your best bet would go for the 4.10's, this way you will have (better than stock performance) and gives you the opportunity to upgrade to a larger tire size. My current tire size is ok for now, but when the time comes, I'll be upgrading to the 285's. And will still be better than stock performance. My gear ratio w/ the 285's will be 4.03:1

F&B's

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1998 (50th anniversary series) Solid Pacific Green F-150 XLT, Supercab, 6' bed, 2WD, 4.2L automatic, Limited Slip and Tow Pkg., Rear slider

Performance Mods:
Superchip
4.10 gears
Outerwears pre-filter and K&N air filter
Dynomax Super Turbo muffler

Suspension:
Edelbrock IAS shocks
Hellwig rear sway bar

Other:
3" body lift
Signal mirrors
Stull polished grills
(4)55 watt driving lights
(2)55 watt back-up lights
all controlled by SPDT switches
Fiberglass hood ;-)
Painted tailgate handle and OEM air dam
Color keyed outer grill
OEM fender flares
Black Max soft Tonneau cover
Driver side grab handle
Lift lips
Viper alarm w/(remote start)
3" rear seat lift
Smart Park 2000
BFG AT's 265/75/16
Carr side steps.......
lmaox10@hotmail.com

 

Sounds like 4.10's are it then.....know wher eI can get a set for a good price? What are the recommended places or brands?

T

 

I am doing some research on this as well. If anyone has some recommendations on which company's gears to buy, please let'er rip. I think the gears (ring and pinion set) will be about $190. Install kit (do I need this, and what is it?) about another $40-$50, and labor $??? depending on where you go, Or you can do it yourself (not too tough, but you really need a hydraulic lift and the right tools, or a friend with a shop!) I did one of these with my old mustang, but I was not involved in the buying of the parts, because I was only 16. By the way, silverback, what rims do you have on your truck?

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1999 2WD XLT 4.2L Auto 3.31 Rear end http://www.geocities.com/cr1f150/mytruck.html
3 inch bullseye spindle lift
Borla catback
Airaid intake
Clear corners



[This message has been edited by CR1 (edited 05-30-2000).]

 

I have 16" American Racing Baja's......I like them other than the fact I must polish the little bastards.....oops sorry about that....

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1997 F150 4.6L, Flare side,American Racing Baja 16X8's, Goodyear Wrangler's LT305/70/16's ATS, Flowmaster 50 series, 3" cat,3.5 Suspension Lift kit, Tinted Windows, Superchip, Rancho 5000's

 

CR1,
for all your questions on an install kit click here;
http://www.ring-pinion.com./Gear%20Talk/Complete.html

 

Might look at this for ring & pinion sets... Not sure if it's any good to you but worth a look.
http://www.oemfordparts.com/partslist.asp?CategoryID=40

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2000 F-150 Lariat S/C 4x4 ORP 5.4L Bright Red/gold