 ratteling pinging noises on highway
pinging noise happenss in 5th overdrive gear. Accelerating in this gear is out of the question as the ratelling pinging noise goes crazy. If I drive against the wind on the highway I have to put it in 4th gear because of pinging and ratelling. My mechanice buddy teases me, says its cause I got a weak 4 banger, But my sister has a 4.0 v6 and it does the exact same noise on the highway. Except with her truck (autotranny) u can ignore it. I tried to ignore mine and it got louder and louder then engine light came on, put it in 4th gear and slowly got better, engine light went off. I can use overdrive on the highway only when Im light and thers no wind. I also have a ratelling noise (no pinging) at engine idle in neutral, but goes away when I push the clutch pedal. I was told by someone that its the release bearing in the clutch. My hope is that the highway noise is also the release bearing, this way Im hoping if I get a new clutch I get two birds with one stone. By the way Im only at 103,000 kms. My nightmare is that the pinging noise on the highway is from my engine. | 
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