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TexasKnucklehead
Jedi Knight
Offline
Saturday was a perfect day in Houston for a TR6 and I did drive mine, but…
My 74 TR6 is making a louder than usual noise, seemingly from the rear end of the car. I know TR6s are notorious for differential mounting failures, and I’m hoping that is not the cause of my noise. If something is broken, I can’t find it from under the car probing with my fingers. I’m used to the usual “da-thum, da-thum, da-thum” heard when rolling over expansion joints on the freeway, but this noise is louder. I can hear it when I roll back over the 1” drop at the end of my driveway. –With either rear wheel. It sounds like the spare tire in the trunk is banging its rim against the trunk. Since I’ve completely emptied the trunk (no tools, spare, jack, handle, fire extinguisher…) I know it has to be something else. The exhaust system hangers were updated about a year ago when a u-joint failed on the main driveshaft. The exhaust has a little movement (from the rubber hangers) but not enough to allow it to hit anything. The springs are new and so are the blocks they sit in. I installed adjustable trailing arm brackets and nylatron rear bushings a few years back (<5,000 miles). With the rear of the car on jack stands, I can feel some slop or play in the differential when rotating the wheel, but it seems about normal, and no noise is involved. Everything seems tight. The noise is not apparent during hard accelerating or cornering –unless there is a 1” or larger bump. Even when I go over a spot in the road where a new section of pavement is higher than the old section, I hear the noise “da-thu-bang”.
I don’t know where to look or how to find the noise. At first I thought it was my imagination, and I know that a little evidence makes a noise louder, but I’m now sure it’s not normal. Any hints or clues would be most appreciated.
Jerry
My 74 TR6 is making a louder than usual noise, seemingly from the rear end of the car. I know TR6s are notorious for differential mounting failures, and I’m hoping that is not the cause of my noise. If something is broken, I can’t find it from under the car probing with my fingers. I’m used to the usual “da-thum, da-thum, da-thum” heard when rolling over expansion joints on the freeway, but this noise is louder. I can hear it when I roll back over the 1” drop at the end of my driveway. –With either rear wheel. It sounds like the spare tire in the trunk is banging its rim against the trunk. Since I’ve completely emptied the trunk (no tools, spare, jack, handle, fire extinguisher…) I know it has to be something else. The exhaust system hangers were updated about a year ago when a u-joint failed on the main driveshaft. The exhaust has a little movement (from the rubber hangers) but not enough to allow it to hit anything. The springs are new and so are the blocks they sit in. I installed adjustable trailing arm brackets and nylatron rear bushings a few years back (<5,000 miles). With the rear of the car on jack stands, I can feel some slop or play in the differential when rotating the wheel, but it seems about normal, and no noise is involved. Everything seems tight. The noise is not apparent during hard accelerating or cornering –unless there is a 1” or larger bump. Even when I go over a spot in the road where a new section of pavement is higher than the old section, I hear the noise “da-thu-bang”.
I don’t know where to look or how to find the noise. At first I thought it was my imagination, and I know that a little evidence makes a noise louder, but I’m now sure it’s not normal. Any hints or clues would be most appreciated.
Jerry
