Drag race - Dirve or Overdrive?

[TurboDave]

I know a lot of the 700r4's wouldnt do a WOT upshift into over drive. I was also told to race in drive rather than overdrive and only use overdrive IF needed as there is more pressure directed to the clutches. Is this true? Not sure, I suppose a trans guy would be able to explain it better.

Yes, 700r4 WILL NOT shift into OD at WOT. 2004r's will.

 

[fast eddie]

Mine shifts just fine too...
Chris you have a PM need some parts!

Ed

 

[bison]

1 - Why would the trans NOT shift from D to OD under WOT conditions?

2 - Does anyone run out of gear in the quarter? I've got to imagine above 120mph in D is every bit of 6200 RPMs or more depending on converter slippage.

You should be able to go 130 mph fairly easily at 6000 rpm with 3.42 final drive, and a 28" tire if the converter is correct for the application.

 

[Mr86t-type]

Resurecting an old thead here - In my car, in Back to Back 1/4 mile passes, I CONSISTENTLY get 2-3 MORE mph, and 1-2 tenths MORE by LEAVING it in OD!!
Looking at the scan data, while leaving it in "D" my rpms in 3rd never go above 4700-4750rpm, for SURE this must be the 23year old Valvesprings

 

[GNeric]

I either manually shift or leave it in drive so the overrun clutches are helping to hold instead of just that little sprag element. Plus when you let off, you get engine braking.