Transmissions and DrivetrainNeed help with your trans? Problems with your axle?
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im about to take my gta to the trakc to get its new base line and i was wondering if i should drag it in Drive or Overdrive?? is a rebuilt 700r4 behind a gasket matched 350 and 3.45 gears in da rear....when i last took it to the strip, i left it in overdrive and the fastest i went was 15.1 and that was with stock size intake, and valve seals leaking bad......i am hoping for mid 14's now but i am unsure...i wasnt sure if it would be a big diff. with drive and overdrive, just thought if i left it in drive it would just be dieing at end of the track for overdrive...i know its a noob question, but i have been hearing things from leave it in drive, shift it manually, or leave it in overdrive...
any helop would be nice
dave
__________________ 1988 Trans Am GTA - Forged 355 (10.3 CR), Custom Grind Cammotion cam, HSR, BigStuff 3 ECM, MSD ingition, MSD pro-billet Distrib., 200cc Dart Iron Eagle Heads, Hooker LT's, 4in. single exhaust w/ Borla xr-1 muffler, Racetronix fuelpump kit and injectors. and a 200-250 wet shot of nitrous ...Level 4 FLT built 700r4 w/3200 stall and 3.45 gears in ausie 9 bolt. UMI adj. TQ arm, tubular control arms, 1 in drop springs, lakewood shocks/struts: 50/50 rear,70/30 front
There shouldn't be any difference. You don't want to get into OD anyway. It's a weak small gear. If you do get into OD in the 1/4 mile, gearing, shift rpm or tire size is all wrong. You should cross the finish line in high gear (1:1) at or just before your shift point.
Since the transmission is shifting on it's own, you're not going to see any change in ET if it's in D or OD.
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Hardtail Racing
All engine, no power adders! Bests: 9.029@150.45 (at altitude)
Theoretical sea level performance 8.623@157.05
thnx man i figured i would mostly leave it in drive and if it gets to were its got no power then i will throw it into overdrive...i just questiond it cuz i raced my buddies ls1 and hit end of power band pretty qick...we'll see at the track...thanx again
