bart27

I have a 2000 trans am. If I drive the car eazy it shifts to over drive fine but if I hold the gas pedal to the flore it will not shift to overdrive is that normal ?

FirstYrLS1Z

iTrader: (4)

Is your reference to 'overdrive' as 4th gear OR torque convertor clutch lock-up ?
Torque convertor clutch lockup will never occur at WOT.
4th gear won't occur until 168mph(2.73s') or 142mph(3.23s')-gear calculator.

bart27

yes 4th gear last time I mashed the gas on the hiway it down shift and it hit the revelimiter I let of the gas and it shift

AintQik

iTrader: (3)

Has it been tuned? Is everthing stock?

bart27

No it is stock for now

AintQik

iTrader: (3)

Its tough to understand what you are describing but...
It may not go into 4th at WOT until you are hauling ***. Does it seem like it wont go at all? Is this a new problem or has it always been this way. I'm more concerned as to why a stock car would hit the rev limiter on a downshift? If it is all stock and not tuned its should not do that.

mrvedit

+1 - I don't understand what is being described either.

I wonder if the 3/4 clutch is simply slipping after the WOT downshift from 4th to 3rd. As FirstYrLS1Z implied, that is the only way you would hit the rev limiter in 3rd gear - either the clutch is slipping or you you are way over 120 mph.

RevGTO

iTrader: (12)

According to EFILive tables, our transmissions are programmed to upshift from 3rd to 4th at 5900 rpm at WOT - 140mph, which basically means you'll never see that upshift. And that's a good thing, because it's generally accepted that a WOT 3-4 is really bad for the trans.

bart27

ok so hears what happened i was driving down the road 60is i pushed the gas pedal to the flore the car downshifted then next thing i new it hit the rev limiter at 115mph. i was told it would not shift to overdrive if i was at wot you haft to be at half or less throttle.