ZR-1 Net Registry Forums - View Single Post - Heavy popping in left rear (U's? Half shafts?)

mike100 · 06-15-2013

he said driveway- usually while turning or maybe transitioning a grade change. It is the dry, rusty axle stub splines popping against the loosened axle nut. I think it is a 34 or 35mm nut. I took my rear tires off, but i know on some vettes you can pop the center cap off to acess the axle nut for a quick tightness check.

the permanent solution involves R&R of the half shaft to get a brush and wd-40 into the splined hub for a good cleaning and then a little synthetic grease upon reassembly. There is also a teflon coated washer (it is mounted inboard and the axle has to come out) that is recommended to be replaced (along with a fresh axle nut probably), but I never had to buy those parts for a low mileage car.

Even the C5's and c6's do the same thing- pretty much all labor and no parts kind of a job. you may choose to do new u-joints while the axles are on the table- if so, use genuine Spicer parts, not the imported ones...they fit sooo much better.

06-15-2013	#5
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,786	Re: Heavy popping in left rear (U's? Half shafts?) he said driveway- usually while turning or maybe transitioning a grade change. It is the dry, rusty axle stub splines popping against the loosened axle nut. I think it is a 34 or 35mm nut. I took my rear tires off, but i know on some vettes you can pop the center cap off to acess the axle nut for a quick tightness check. the permanent solution involves R&R of the half shaft to get a brush and wd-40 into the splined hub for a good cleaning and then a little synthetic grease upon reassembly. There is also a teflon coated washer (it is mounted inboard and the axle has to come out) that is recommended to be replaced (along with a fresh axle nut probably), but I never had to buy those parts for a low mileage car. Even the C5's and c6's do the same thing- pretty much all labor and no parts kind of a job. you may choose to do new u-joints while the axles are on the table- if so, use genuine Spicer parts, not the imported ones...they fit sooo much better. Last edited by mike100; 06-15-2013 at 11:17 PM.