i got a 3.08in my rear end, thinking of switching t0 3.73s with a ls spool. what do you think? i got the v-6 so im thinking it would wake the truck up a bit

 

Yes, very noticeable. 3.73s and 4.10s are very nice upgrades. A change of .75 or so (or more) make the vehicle feel like a whole new beast. It is the perfect time to get a "posi" rear end. The "spool" is a different setup though, it permanantly locks both axles and is for off-road use only. Good Luck !!

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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.

 

Are you planning on still driving this truck on the road when you're done? If so I would advise you get a locker or LS setup for the rear end. The spool won't really hurt anything, but it will wear your tires out faster. If you're just planning on doing some occasional offroading or just want to get some extra traction on the street, get a locker not a spool.

 

It would make a nice improvment!I went from a 3:08 open with 235/70-16's to 3:73 ls with 275/60-17's.I can actually step on the gas without the truck laughing at me now.

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97 F150 Flareside Ext Cab
XLT,4.6 Auto,DK Toreador Red,Ford Signature Atlas rims
275/60 17 Yokohama AVS ST
3:73 LS,K&N Fipk
Superchip,Flowmaster Force II,Ford 9mm wires
Bosch Platinium +4
MAAP SS step bars