94 F150 4R70W issues
#1
12-29-2017, 10:08 PM
Join Date: Dec 2017
Location: Glendale, AZ
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94 F150 4R70W issues
Hey everybody, I知 having an issue with the 4R70W in my 94 F150. The issue is, when the trans is at operating temperature, I知 getting a bad shudder during the 1-2 shift, similar to a converter shudder. The trans itself was rebuilt by Ford and only has about 30,000 miles on it. No issues with any other gear, and no issues with converter lockup. There is no material in the pan, always filled with Mercon V. I even installed a new bonded 1-2 accumulator, and swapped the shift solenoids and lockup solenoid and the result was no change. It will not act up at all when it痴 cold. I知 about ready to pull it out and go through it and rebuild it, but was wondering if there was anything else I can check. I though about the EPC solenoid, but again, there are no codes. I壇 appreciate ANY suggestions
#2
01-02-2018, 01:25 PM
4R70W is usually such a dependable transmission. Considering what you've already checked it sort of makes you think some clutches aren't grabbing there.
Something like Lucas trans fix might clear it up - I haven't heard of any instances of it hurting anything, so maybe worth a try.
And I'd personally try a new pcm before pulling the trans. Also resistance in the wires or a bad connection. And check all the codes. A warmed up truck means closed loop and the pcm reading all the sensors and it is amazing what a faulty sensor reading way over here can do to affect a pcm output over there.
It seems that most of the time issues with the electronic shift transmissions has absolutely nothing to do with the inner workings of the transmission itself.
Something like Lucas trans fix might clear it up - I haven't heard of any instances of it hurting anything, so maybe worth a try.
And I'd personally try a new pcm before pulling the trans. Also resistance in the wires or a bad connection. And check all the codes. A warmed up truck means closed loop and the pcm reading all the sensors and it is amazing what a faulty sensor reading way over here can do to affect a pcm output over there.
It seems that most of the time issues with the electronic shift transmissions has absolutely nothing to do with the inner workings of the transmission itself.