TC rearend - "grinding" noise Reply #45 – September 13, 2009, 12:47:01 PM The front are new braided SS and the rear are new rubber/metallic, both with new banyo bolts and copper washers. No leaks at any fitting. The brakes are working good again after bleeding them but I don't put faith in it happening again. The fronts work perfectly fine still. Quote Selected
TC rearend - "grinding" noise Reply #46 – September 15, 2009, 08:29:33 PM So the sound got much worse, so much that I don't want to drive it. This morning I painstakingly drove it up to a shop again and it was growling/howling (rough deep whine/howl) for the couple mile drive. I didn't go over 40mph as it felt weird at anything higher.Around noon they took it for a drive. They couldn't reproduce the sound. I went ot the place and drove it and sure enough, it's GONE. The rearend is quieter than the 7.5 it replaced. Perhaps it just takes a couple hours to get oil up to the pinion bearings if it were "low" but I doubt it. It was making terrible sounds when I pulled into their parking lot this morning.Should I just drive it and be happy or find ways to bring it back? The car never decelerated like a rear caliper was stuck or anything and it locks/unlocks properly up on jack stands with the brake pedal. Why must I have the weirdest problems that no one has experienced before?! I have some nasty popping up front when braking and/or turning now but it's got to be those rag joints as the front suspension is tighter than new. Quote Selected
TC rearend - "grinding" noise Reply #47 – September 15, 2009, 09:59:17 PM Pinion bearing worn out would make that noise also. I woud jack up rear end and put it in gear to find out where it is coming from. I would guess pinion area. good luck!!!:birdsmily: Quote Selected
TC rearend - "grinding" noise Reply #48 – September 15, 2009, 10:18:55 PM Except it stopped making noise so I can't pinpoint anything now. My thought this entire time is pinion bearing but it's hard to check things out when they have quieted down within hours of sitting. I may just install some 3.27's with a new bearing instead of keeping the 3.55's. With my tire width, I have terrible traction as it is and the wide ratio transmission doesn't help anything in that aspect. Quote Selected
TC rearend - "grinding" noise Reply #49 – September 18, 2009, 10:42:59 PM It's back, in its original state. Goes away with any load, makes noise when coasting. It's not as loud, or acting the same, as it was last week but it's still worrisome.The car was fine until I got on the gas for some datalogging. Lost traction on 1/2 shift at 40mph but it's dry and straight. Everything was still fine until I got on the highway for a single exit. Upon coasting behind a car going slow on the on-ramp, the noise returned. I couldn't reproduce it as hard as I tried 3 days ago but I also had a conservative tune on the transmission since it was going in the shop (3k max shift points). I have no clue what would cause such odd behavior! Quote Selected
TC rearend - "grinding" noise Reply #50 – September 19, 2009, 01:42:14 AM i cant help man, ive never even taken axles out before. its a whole technology i have no knowledge of other than mechanical theory.to beat all, i need bearings back there myself. gotta pop a c-clip off in the diff the yank the axle i guess thats how its done.what are the odds you have a bearing race coming loose and its cantering slighly and its bearings making the noise? its the only thing i can think of that could move around if there were some wear. spindals wear and the inner race will spool around causing vibration up front. seems resonable that bearing play might allow race movement even if it were seated properly. maybe the race seat is worn and its getting pen 15eyed or something. you wont know till you check. Quote Selected
TC rearend - "grinding" noise Reply #51 – September 19, 2009, 12:02:20 PM What's amazing is those little 1/4" c-clips are all that hold the rear axles from flying out (besides the calipers sitting over the rotors). Quote Selected
TC rearend - "grinding" noise Reply #52 – September 19, 2009, 11:15:24 PM Quote from: Seek;291780What's amazing is those little 1/4" c-clips are all that hold the rear axles from flying out (besides the calipers sitting over the rotors).Works just fine.This saga continues, now it is starting to sound like a ring and pinion and the bearings. I will last a long time doing this if you can put up with the noise.TED Quote Selected
TC rearend - "grinding" noise Reply #53 – September 21, 2009, 12:10:32 PM Perhaps but there's always a "worse case scenario" that makes me want to get it fixed asap. I don't need the bearing falling apart and jamming itself in places it shouldn't be. Quote Selected
TC rearend - "grinding" noise Reply #54 – September 21, 2009, 03:24:14 PM I assume you have a limited slip. Perhaps its the clutch pack or spider gear pins. If you drive the car around in a tight circle does the sound come and go?Maybe there is some junk caught between the clutches and steels? Quote Selected
TC rearend - "grinding" noise Reply #55 – September 21, 2009, 03:57:02 PM The sound goes away when turning the wheel more than like 30 degrees. It doesn't come back in a tight circle (I do this often to turn around and park). I should add that the sound slowly went away over Saturday (drive it 15 miles to a job). I'm going to jump on it again this afternoon and see if it comes back - it should if my theory is correct. Quote Selected
TC rearend - "grinding" noise Reply #56 – September 21, 2009, 08:37:36 PM The saga continues. I now have a faint howling coming from somewhere and I assume it's from the rear. This sound I cannot pinpoint. It is much more high pitched than anything I've heard from it before. I did this to it though - I was getting on the gas whenever I could while heading up to a shop but they didn't have time to do another test drive. When back in the neighborhood, I was getting a repeated tapping noise from somewhere again, only heard when below 30mph. It doesn't happen when turning left (neighborhood route is full of lefts). I'll drive it hard tomorrow morning and drop it back off so they have a chance to hear the racket that's going on. Else I'm thinking I should just change the gears (3.27's or perhaps a 3.08 would be a better fit for my driving style) and get the new bearings in there. Quote Selected
TC rearend - "grinding" noise Reply #57 – September 22, 2009, 06:09:03 PM Okay, so the problem is apparently carrier bearings. After looking into it further, this does indeed sound like what my symptoms were showing Quote Selected
TC rearend - "grinding" noise Reply #58 – October 02, 2009, 04:36:08 PM Easy job to do. I had a problem where my diff would bang on decell to a stop. One of the carrier bearings was half missing the rollers. Still drove fine. Quote Selected
TC rearend - "grinding" noise Reply #59 – October 02, 2009, 06:36:11 PM I've been driving mine that way for three months!Hmm, guess I should fix that...86Caprirs, Was it a repetitive banging, or a clunking noise? Quote Selected
I've been driving mine that way for three months!
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