On a 100% stock tranny, what shiftpoint can you safely go to? Currently truck shifts at 48-4900, I was wondering how far I could push it before torque converter and valve body. I really dont want to do them as I plan to go built transmission later on

 

My WOT shift point is set at 5400 rpm and I haven't had any problems with my transmission.

http://www.ford-trucks.com/article/i...rformance.html

 

All right sweet thats exactly what I wanted to hear! Thanks!

 

i was told by mike going more then 5100 is bad..

when i get properly tuned i would liek to be a 5250

 

I think mine are around 52ish

http://www.youtube.com/watch?v=5HgrECc-2Uo

 

52 aint bad.... Hmm!

 

Mine's an odball. With the custom Roush tune is sometimes shifts at 5100 rpm. Other times it shifts at 5400 rpm. When it does shift at 5400 rpm it does just fine.

 

is yours a roush truck? Or did you just put a roush blower on it?

 

It's a Roush. The truck has been reprogrammed twice. The last reprogram was a custom tune by Roush to eliminate a thrown code for the MAF.

And it is an excellent program nonetheless. Smooth, solid shifts at high RPM shiftpoints.

 

right at 5k on my own tuning
http://www.youtube.com/user/Patman03sprcrw

 

I think my truck shifts at 4900 and then maybe a little over 5 on the shifts after that. I'm not exactly sure. I'll try 5200 and see how the torque converter does. If it blows up, I'll just have to build a bullet proof one till the bottom end blows.

 

You should be OK at 5200.

 

Hey roush, if you get a chance, can you see what your truck shifts at WOT in first and second gear? I want to see if its the same 5200 or if it starts out with a lower shift point for first then second.

 

Sure thing! I'll check this tomorrow. I'll also check it based on early morning temps vs warmer temps in the afternoon.

 

Remember that sometimes you may hit a speed limit vice an rpm limit. One of my vehicles with an SCT Xcal shifts before the rev limit in second gear when in automatic. In manual mode it goes right to redline. Ask your tuner or you can go in on some tuners and program an increase in mph.

Just a thought.

Not sure about 3v motors, but bottom end of 2v 5.4's are not as strong as L/HD's. I'm running 5600 with L crank, forged rods an pistons with no problem. Now then there's the tranny, 4R70W.