Mild E4OD Whine
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Mild E4OD Whine
My 93 E4OD has developed a Whinning sound that directly follows engine RPM (not vehicle speed). It is not very loud, and the transmission is still shifting perfectly. From my research, this is either a convertor (unlikely) or pump issue. As it is a 93, I must have the undesireable "E9" pump casting. If I replace the pump, what is the newest revision pump I can/should use (F5, F7 F?). I am also considering getting the Factory Tech VB while i'm at it.
Is there anything other than TC or pump that could cause the whine to follow engine RPM? Its loudest when you first start the truck, but you can barely hear it over the normal vehicle noises. Any chance the filter fell out and is causing it?
How this might have happened:
Fuel pump went out several weeks ago and a buddy had to tow me home a short distance. He started pulling before I got the transmission in N
. When I hurried to get it in N it banged pretty loud. The whinning started about 2 weeks after that. I have no other transmission issues.
No KOEO, CM, or KOER codes
Is there anything other than TC or pump that could cause the whine to follow engine RPM? Its loudest when you first start the truck, but you can barely hear it over the normal vehicle noises. Any chance the filter fell out and is causing it?
How this might have happened:
Fuel pump went out several weeks ago and a buddy had to tow me home a short distance. He started pulling before I got the transmission in N
. When I hurried to get it in N it banged pretty loud. The whinning started about 2 weeks after that. I have no other transmission issues.No KOEO, CM, or KOER codes
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