I am in the middle of swapping my car to an automatic for many reasons. The only thing I am a little worried about after the swap is everyone tells me how fast the auto up-shifts during part throttle. For example, mt friend with a 4r70w and 4.10s says that he is in OD by the time he gets up to about 30mph if he isn't WOT. What would I need to adjust in the tune to get the shifts to drag out a little longer?

 

You can do it in the tune, but IMO, the better option if your concerned about it is a full manual valve body....shift it when you want.

 

A full manual valve body kind of takes away one of the major benefits of having an automatic. I already have a shift kit that will hold every gear, so if I want to I can upshift it all the time manually. It still would be nice to just be able to change the shiftpoints at part throttle like you can at WOT. Is that possible?

 

Yes, it can be done for sure.

 

Here is a screen shot of the adjustments for part throttle shifting in CMR

 

Thanks mike. I'm sure messing with this stuff is gonna be fun. Is there anything else I should look out for that would be different when tuning an auto? I mean besides the shifting stuff. I have heard a couple people say they like a little bit more timing at WOT. Is that true?

 

if your gonna spend the time swicthing over to a 4r70w stop!!!! if your gonna upgrade to a 4r100 or a e40d lot more after market support fo those two tranys can tune them to shift when u want at pt or wot presure and both transmisson have bellhousing for 4.6 and 5.4 blocks. dont waste the time swithing over to a 4r70w is still a weak small trans

 

4r70w isn't that weak, they have some folks making mid 7 second passes on 4r70w transmission with the lockup still !!!!