I hve 3.55 Open non LS on a 97 Lariat, just switched to 265/75/16 Michelins. Noticed some loss of low end torque and was wondering if I switched rear ends to a 4.10 if it would be worth it. I am getting about 13 -14 in the City, and 17 on the highway. I do not want to sacrifice gas mileage for more torque. Any ideas.? Thanks.

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97 F-150 Lariat, Leather, Ext. Cab
White/Champagne, 4.6L, Auto.
Tinted Windows/Bedmat
Toolbox/Lund Bug Deflector
Dual Exhaust
Grille Guard
Chrome bed rails
265/70/16 Goodyear Wrangler Rt/S

 

If your primary goal is quickness and city mileage, 4.10s are great. If your primary goal is "highway" mileage, leave it.

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2000 F-150 XL, RC, LB, 5.4L, 4R70W, 3.55LS,
Class III tow, Payload #3, & Convenience pkgs.,
4-wheel disc/ABS, Chestnut/Parchment 40/60,
Ford bedliner w/Paintsaver & gas/wheel/spare locks,
K&N F.I.P.K. w/Outwears pre-filter, Superchip,
Dynomax ultra-flow welded 3" cat-back w/ 3" Y-pipe,
Hellwig front & rear anti-sway bars, Rancho RS 9000s,
Mobil 1, K&N oil filter.