98's have a mechanical speedo, the only options are a gear or a speed-cal. And like tmj said, you need a 23t gear.Chili said:Or buy a hand held tuner (like the Predator or Xcal) which can adjust for gear changes, tire size, etc.. Plus you get the other benefits such as tuning (duh), mil eliminators, shift point and pressure adjustments (auto), data logging, diagnostic code reading, etc.. Well worth the $350..
squares98 said:98's have a mechanical speedo, the only options are a gear or a speed-cal. And like tmj said, you need a 23t gear.
MidnightBlk98GT said:Well, the reason I ask is that I had my gears put in about 3 years ago and when it came time to rebuild the tranny the 23 tooth (white) gear that was in there was all chewed up. I bought a replacement gear but now I'm wondering if the feeding gear, the speedometer drive gear, is the correct one that is in there. Any ideas??
Edit: Yes, the speedo sending unit rotates freely.
97gtblue said:couldnt tell you....its some kind of gear that went in my transmission
9646gt said:my car has 4.10's (96gt) but the speedo sometimes wont work till you hit 80 and sometimes is way off (20+mph) and is never the same..do I have a broken speedo gear? If yes how hard are these to change and what do they cost...I have 275 40's in the rear
tjm73 said:That could be an electrical problem, or a wornout needle spring, or something else. Speedo gears are cheap at about $15 bucks or so and are pretty easy to change. I doubt that's the cause baised on what you describe. I'd look for an electrical problem.
275/40R17 is the same height as the stock 245/45R17.
9646gt said:Great I love electrical problems..but if its a mechanical gauge what type of electrical problem could I have?
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