Ordering new gears for 4x4 - what sizes?
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Member
Joined: Feb 2000
Posts: 35
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From: Reseda, CA
Ordering new gears for 4x4 - what sizes?
Hi, folks...
I'd like to switch from 3.55 gears to 4.10 gears. I've read (on this board and elsewhere) that the front diff. gears must be a fraction lower (i.e. R=4.10 F=4.11). Is this true? And, must I be very careful when ordering to make sure the shop orders a properly matched set?
Any horror stories? (I'm bored at the moment...)
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Tom Kenney
WORK: tomk@bearcomp.com
PLAY: tom@fluxtech.com
My truck, Sparky, is a 1992 F-150 XLT SuperCab shortbed 4x4, 302, 3.55 LS, 31"x10.5" Dunlop Radial Rovers, silver-on-black two-tone paint. MODS: K&N Filter, Rancho Steering Damper, Duraliner
Sparky's Page
I'd like to switch from 3.55 gears to 4.10 gears. I've read (on this board and elsewhere) that the front diff. gears must be a fraction lower (i.e. R=4.10 F=4.11). Is this true? And, must I be very careful when ordering to make sure the shop orders a properly matched set?
Any horror stories? (I'm bored at the moment...)
------------------
Tom Kenney
WORK: tomk@bearcomp.com
PLAY: tom@fluxtech.com
My truck, Sparky, is a 1992 F-150 XLT SuperCab shortbed 4x4, 302, 3.55 LS, 31"x10.5" Dunlop Radial Rovers, silver-on-black two-tone paint. MODS: K&N Filter, Rancho Steering Damper, Duraliner
Sparky's Page
Senior Member
Joined: Jun 1999
Posts: 329
Likes: 0
From: Cary, NC
TomKenny,
I've heard the same thing. It was a long time ago at a mud sling, I believe. I can't for the life of me rationalize why you would want your front wheels turning at a different speed than your back wheels. I don't know for a fact the mud slingers were actually using different ratios. If I remember correctly, the ratios were reversed from what you stated (4.10's in front/4.11's in rear for example). The theory being, the front turn slightly faster than the rear to help keep the vehicle straight. They may very well have that type of arrangement. I don't think it would be very practical for our purposes though.
I just received a set of 4.10's (front and rear) for my truck. I ordered them from Reider Racing. These are made by Precision Gear. I'm still searching for someone I trust, or at least feel comfortable with, to do the install. If anyone can make a reccomendation for a first class differential guy anywhere close to my area, I'm all ears!
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98 F-150 XLT 4X4 ORP Super Cab Short Bed, 4.6, Auto. Magnacharger supercharger. Superchip, Gibson sing. cat-back, 80/100w German head lamps. Warn HS9500i winch with semi hidden mount. Wrangler dual battery kit with red & yellow top Optima batteries. Torsion bars cranked up 2 turns. Needs one more door.
I've heard the same thing. It was a long time ago at a mud sling, I believe. I can't for the life of me rationalize why you would want your front wheels turning at a different speed than your back wheels. I don't know for a fact the mud slingers were actually using different ratios. If I remember correctly, the ratios were reversed from what you stated (4.10's in front/4.11's in rear for example). The theory being, the front turn slightly faster than the rear to help keep the vehicle straight. They may very well have that type of arrangement. I don't think it would be very practical for our purposes though.
I just received a set of 4.10's (front and rear) for my truck. I ordered them from Reider Racing. These are made by Precision Gear. I'm still searching for someone I trust, or at least feel comfortable with, to do the install. If anyone can make a reccomendation for a first class differential guy anywhere close to my area, I'm all ears!
------------------
98 F-150 XLT 4X4 ORP Super Cab Short Bed, 4.6, Auto. Magnacharger supercharger. Superchip, Gibson sing. cat-back, 80/100w German head lamps. Warn HS9500i winch with semi hidden mount. Wrangler dual battery kit with red & yellow top Optima batteries. Torsion bars cranked up 2 turns. Needs one more door.
Senior Member
Joined: Jul 2000
Posts: 133
Likes: 0
From: Galveston, TX
98fword, what kind of axles do you have? do you know if anyone has advertised a new set of gears for the ford 9.75" and 8.8" rear/front respectively?
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1999 Red F150 4x4 5.4L XLT X-Cab Towing Pkg
Corporate 9.75 Rear End
3.55 Limited Slip
K&N Generation II
Jet Chip
Gibson Headers
32x11.50 S.Swamper SSR
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1999 Red F150 4x4 5.4L XLT X-Cab Towing Pkg
Corporate 9.75 Rear End
3.55 Limited Slip
K&N Generation II
Jet Chip
Gibson Headers
32x11.50 S.Swamper SSR
Senior Member
Joined: Jun 1999
Posts: 329
Likes: 0
From: Cary, NC
Red BullSr,
I have 8.8's front and rear. I believe Reider Racing has what you're looking for. www.reiderracing.com. They have about as good a price on quality gear sets as anybody.
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98 F-150 XLT 4X4 ORP Super Cab Short Bed, 4.6, Auto. Magnacharger supercharger. Superchip, Gibson sing. cat-back, 80/100w German head lamps. Warn HS9500i winch with semi hidden mount. Wrangler dual battery kit with red & yellow top Optima batteries. Torsion bars cranked up 2 turns. Needs one more door.
I have 8.8's front and rear. I believe Reider Racing has what you're looking for. www.reiderracing.com. They have about as good a price on quality gear sets as anybody.
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98 F-150 XLT 4X4 ORP Super Cab Short Bed, 4.6, Auto. Magnacharger supercharger. Superchip, Gibson sing. cat-back, 80/100w German head lamps. Warn HS9500i winch with semi hidden mount. Wrangler dual battery kit with red & yellow top Optima batteries. Torsion bars cranked up 2 turns. Needs one more door.
