4r70w
#1
4r70w help needed
So I lost reverse after getting stuck last August. I have since pulled and rebuilt the entire transmission. I have reinstalled the transmission and I still don't have reverse. The only thing I can come up with is maybe the TRS or a wire to it is bad. I know the reverse band and servo piston is good. I guess it' possible that a valve in the valve body is stuck but I wouldn' know which one. Any help would be appreciated.
Last edited by Ron Rabe; 04-14-2018 at 12:59 AM.
#2
#4
I don' really have useful pictures, I only really took a ot on the tear down. I know that the servo piston, low reverse band, and the reverse clutch should be in good working order as I rebuilt and/or replaced those parts.
What is the reverse boost valve and where is that located? I don' recall seeing that in my rebuild book I purchased at summit for the 4r70w.
What is the reverse boost valve and where is that located? I don' recall seeing that in my rebuild book I purchased at summit for the 4r70w.
#5