A loud buzzing or whining when the transmission is in reverse may be caused by a regulator valve in the transmission valve body. A revised valve was released that does not resonate. Careful diagnosis should be performed because other causes can create the noise.
Regulator valve may cause noise when transmission is in reverse on Jeep Cherokee
Average mileage: 44,466 (400–132,000)
Drive Trains affected: 4 Speed Transmission, Automatic Transmission
7 people reported this problem
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When in gear it makes a whining noise. So far all jeep has told me was that they are aware of the issue and are working on a resolution.
sounds like I have the same problem, I will be contacting the dealer tomorrow. I will try to follow up with there answer.
I have a winding and or grinding in reverse with no engagement doea not take reverse what could it be please help 1998 jeep grand cherokee laredo 4.0