joey b Posted July 8, 2004 Report Posted July 8, 2004 My car hits ~44 when I am WOT in 1st, but I run 5K at just over 60. That is about 12 MPH / 1K RPMs, running only to 79 MPH in 2nd gear before shifting. What do the other 3.4's run and why is mine different? I know that my tranny has been replaced or worked on at some point. Do you think I have some different gearing for some reason? Quote
SigEpCutlass Posted July 8, 2004 Report Posted July 8, 2004 doesn't the ffp chip change the shift points? Quote
joey b Posted July 8, 2004 Author Report Posted July 8, 2004 on another look, If I am holding steady, I run about 4700 RPMs and this changes quite a bit when I get on the gas or let off. When I am at WOT though the RPMs are higher and in that case, I can't hit 80 in 2nd. Going 70 in 3rd gear I run about 3200 I believe. Maybe BIGBULS can shed some light on this for me. And yes FFP does change the shift points but that shouldn't affect the gearing. Quote
BIGBULS Posted July 8, 2004 Report Posted July 8, 2004 Your 1-2 shift (44mph/6250-6300rpm) seems dead on the money. You 2-3 shift DOES seem a *little* short, but not much...............if yours is going off at 79mph, it's only 2-3mph lower than most other stock cars (most shift at 81-82mph/6150-6200rpm). I expect your torque convertor just isn't locking up all the way. I should also point out, the main reason you rev so high at ~60mph is because the TC doesn't lock back up (of the 1-2 shift) until ~75mph...........it takes THAT long. This lack of lockup is also why you have so many rpm off of the 1-2 shift (~4200rpm, which is about 800rpm worth of slip when you consider that 1st gear is a 2.921 and 2nd a 1.568). The other possibility is that your speedometer is a little pesimistic..............you may very well be AT 81mph even though the speedo says 79............got a GPS or a radar trailer handy? Quote
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