Question about 1996 Chevrolet Corvette

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Rear axle noise on accel and decel

My 1996 Corvette has noise in the differential, it happens at freeway speeds, it sings on light throttle and coast, is this gear noise, the diff seems to have a little to much backlash. The car has 61,000 miles on it.

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It is gear noise.The style of this car you will hear a little noise because of how the rear end sits close to the driver and it is open behind you kinda makes an echo effect. probably getting play in the carrier side bearings allowing the gear to "walk" a little causing the pitch to change. this is usually the first cause of failure.You can just replace the bearings and set back up but might still get some noise if it has created a new wear pattern on gear set. This noise will not affect performance or how long it lasts.

Posted on Sep 10, 2008

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1 Answer

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Provided that this is a rear-wheel drive vehicle, there are a number of things which can make noise when you accelerate. Most are due to excess clearance in moving parts. This means some parts are worn out.

On the outside, the U-joint next to the rear differential can be worn and make noise. Inside the differential, usually a pinion bearing(carrier bearing) can make a noise like a whine or growl depending on the gap.

Now in the axle tube, the axle shafts have a bearing on each wheel. Like any bearing, when they wear out, noise usually indicates failure.

When Torque is applied on acceleration, the parts shift creating noise. If you have a Limited Slip Differential, there are clutch plates which have a material which can wear out. These types of rear ends also need a special Additive to make the parts work. Sometimes you get a clatter when the additive is low.

Have the U-joint checked first as it is the only external part to check. The rest will need disassembly.

Please rate my info.

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