My F-150 4x4 has the 3.55 limited slip rear differential. The standard rear ratio is 3.31 according to edmund.com. When the LS option is installed, do they install a different gear set in the front differential to match the ratio of the rear? Also, I have read in newsgroups that the limited slip eventually goes away (40,000 mi.) as the clutch packs wear out. If so, how difficult will it be to replace them?

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Billy
2000 F-150 4x4 4.6 Auto 3.55LS TowPkg

 

I am not exactly sure if it would be the identical same as my 89 is. It has the 3.55 rear and a 3.54 front. But the answer to your question is yes, it would be the same.

 

Billy,
The front gears should be the same as the rear to eliminate drivetrain stresses of different ratio's working against each other. The l.s. diff. wears depending on how much it's used (how often you turn sharp), or how often you engage it due to slippage. I you drive alot on the highway you put minimal wear on it.

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'97 Ford SC 4X4 XLT Off Road pkg., 4.6,A/OD, 3:55, premium sound w/CD chg, Black clct,towing pkg., hvy duty elec. pkg., Bridestone dueler AT's, line X, Flowmaster true duals, chip, K&N air filter, smittybilt stainless nerf bars