I'd say tire wear but I can't remember if lower O.D. makes the speedo faster or slower at a given RPM. If anything I think a smaller O.D. makes your speedo read TOO fast, ex. you're doing 100 KM/H indicated and you're really only going 95.
Could be anything... given that you're only 2.x % off from stock, I doubt the dealer would worry too much about it. Maybe clutch slip? I think I had a very similar experience in my old Bronco II before.
Nathan - I'm doing pretty much 100 KM/H @ 2000 RPM in my truck, but that might be out a tad because it's a converted cluster (metric install in a USDM vehicle before it was sold to me). I've paced a few cars and figure it's pretty close to bang on, and my GPS agrees with me that I can recall.
Could be anything... given that you're only 2.x % off from stock, I doubt the dealer would worry too much about it. Maybe clutch slip? I think I had a very similar experience in my old Bronco II before.
Nathan - I'm doing pretty much 100 KM/H @ 2000 RPM in my truck, but that might be out a tad because it's a converted cluster (metric install in a USDM vehicle before it was sold to me). I've paced a few cars and figure it's pretty close to bang on, and my GPS agrees with me that I can recall.
Daily driver 1: 2007 Jeep Wrangler Unlimited Sport "S"
33" BFG Mud-Terrain KM2s, lots of Rough Country gear - bumper, 2.5" lift, swaybar disconnects, Superwinch 10,000lb winch, Detroit Locker in rear D44 axle, custom exhaust, K+N filtercharger, Superchips-tuned.
Daily driver 2: 2006 Subaru Legacy GT
COBB Stage 1+ package - AccessPort tuner, COBB intake and airbox. Stage 2 coming shortly - COBB 3" AT stainless DP and race cat, custom 3" Magnaflow-based exhaust and Stage 2 COBB tune.
33" BFG Mud-Terrain KM2s, lots of Rough Country gear - bumper, 2.5" lift, swaybar disconnects, Superwinch 10,000lb winch, Detroit Locker in rear D44 axle, custom exhaust, K+N filtercharger, Superchips-tuned.
Daily driver 2: 2006 Subaru Legacy GT
COBB Stage 1+ package - AccessPort tuner, COBB intake and airbox. Stage 2 coming shortly - COBB 3" AT stainless DP and race cat, custom 3" Magnaflow-based exhaust and Stage 2 COBB tune.