The second type is when the transmission suffers some sort of internal damage and the transmission starts to ‘slip’ when in Drive. One, the most common, is caused by some sort of electrical failure and which causes the vehicle's computer to command the automatic transmission to stay in 2nd gear no matter what the vehicle's speed. Two Of The Most Common 4R70W Transmission FailuresĤR70W automatic transmission problems boil down to two basic types of failure. Now, although in this article I won't be showing you how to tear down your transmission, it will help you to find out if your electronically controlled automatic transmission issue is due to a malfunctioning shift solenoid/sensor or internal damage.īy the way, the info in this article can also be applied to older AOD-E equipped Ford vehicles with OHV V8 engines. You may be asking yourself: How can I tell if my automatic transmission needs an overhaul? How can I tell if it's just a shift solenoid that's bad? These are some of the most frequently asked questions I get and if you're having an automatic transmission issue with your GM rear wheel drive vehicle, this article might have some of the answers you're looking for. The 4R70W automatic transmission in the Ford 4.6L or 5.4L usually fails in one of two ways: It'll either start slipping (when in Drive) or will go into ‘Limp In Mode’.
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