4.30
For an auto, definitely 4.10's. I will GUARANTEE that you will regret going with anything lower than that.
...shifting into O/D well short of the 1/4 mile mark...
I'm not familiar with the automatic transmission, there's not a way to deactivate the OD?
If you went to 4.30s and still forced 3rd gear, you'd be at ~6100RPM, in excess of redline (at least for the stock internals...)
I'm not sure what it is about the 4R70W that makes it unhappy with such a condition as ran260gt alleges (maybe he's thinking converter clutch lockup?) but the problem is that if you force the trans to stay in 3rd gear (1:1), then the restriction becomes engine RPM: If you've got a car going through the traps at 110MPH then with 4.10s the engine RPM would be in the range of 5800, very close to redline but technically below it.
If you went to 4.30s and still forced 3rd gear, you'd be at ~6100RPM, in excess of redline (at least for the stock internals...)
+!, even on a built trans like mine. You have a kevlar band then you risk twisting the input shaft into licorice.The 4R70W first three gears are clutch packs , the O/D is a band , this band is much weaker then a clutch pack , if you shift from 3 to 4 at full throttle you are at risk for blowing your O/D !
With the stock 4R70W you want to stay in 3rd gear in the 1/4 mile at all cost , with the 4.10s 3rd gear is only good for about 110mph depending on tire size ,so If you plan on going over 110 in the 1/4 , go with 3.73
If you plan on staying under 110 in the 1/4 , go with 4.10 !
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?