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You are here: Experts > Home/Garden > Auto Repair > MG Car Repair > Gear Noise
Expert: Howard M. Fitzcharles III - 10/29/2009
Question
I have a 78 MGB that at speeds above 60 kph, when I let up on the gas there is a loud rattling noise that appears to be coming from the rear of the car. Only on deceleration. I have changed out the universal joints, no change. I put the vehicle on jack stands and ran the car to listen for the noise at the diff. and at the wheels and transmission, but nothing. Where else would it be coming from.
Answer
Hi Allen,
I can tell you a few things to do to try to pinpoint the noise but not being able to hear the noise I have no way to tell you what it is.
First check for any up/down free play in the differential flange or any in out movement at all. Next try it in 3rd gear and if it is there too is it at the same road speed. Next check the amount of rotational free play in the differential flange. Then jack the rear end up and hold one wheel and see how much free play in rotation the other wheel has. Let me know all of these. Also with light touch on the shift lever do you feel the vibration in the shift lever?
Howard
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