Join Date: Dec 2004
Location: Castle Rock, CO
I'm running 4.56 with 255/85/16's. On the trail it might be nice to have the 4.88s, but on the highway 4.56 is a good gear for the tire size. I can't imagine 4.88's on 265/75's on the highway. For me 70mph is real close to 3000 rpm. I don't find the need to go much faster than that very often. 4.30's with 265/75's would be closer to stock final drive ratio, but I wouldn't think you'd feel much difference over 4.10's. IMO 4.56 would be a good comprimise with 265/75 tires. You might find it winds up a little higher on the highway, but the low range control you will have off the pavement will more than make up for it. Swap your speedo gear with one that has three more teeth (I think), and your speedometer/odometer should be pretty close.
If highway duty is really your #1 concern, a TRD S/C installed in your own garage isn't going to be that much more expensive than gears installed by pro that knows what he's doing. For example, I paid $1250 for a used S/C and installed it myself in about four and half hours in my own garage with basic tools. I purchased Motive gears and install kits at a good price and had them installed by a shop for ~$1100 total. Don't let all the hype about tunning and fuel goodies on the S/C scare you. At our elevation, the air is thin enough that fuel delivery is only a problem if you are running a overdrive pulley.
2002 V6, X-Cab,TRD SUPERCHARGER, IK22 plugs, URD 2.0" pulley, URD 7th injector kit w/ AFR Calibrator, TRD Headers, TRD Cat-Back, AEM Brute Force w/ Dryflow, ported & polished throtle body, URD Crankshaft pulley, 4.56 Motiv gears, ARB RD-90 locker, 255/85/16 TRXuS MT's, DR Coilovers, Camburg UCA, Skyjacker 2.5" leaf springs, Wheeler's SS rear brakeline, Bilstien 5100's, on board air