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Join Date: Aug 2001
Location: New York, NY
Posts: 72
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Help! New Wrench says there could be a problem with differential -
The former mechanic shop that I used to service my 1983 944 closed down, so I am trying out a new wrench for a state inspection and oil change as of this morning. The shop seems reputable and works on Porsche, Ferrari, Audi and Benz - a step up from my former mechanic - he seems knowledgeable and honest. He just called, however, and said that while he was taking a test drive he heard a loud high pitched noise from the rear, which I honestly had not noticed myself. I haven't been driving the car regularly due to the weather and I just installed a new set of rear speakers so I have had them turned up when driving. I am trying to figure out if he is trying to take me or not. I have read other posts, but:
What type of noise would the differential in need of repair make? What would be some of the other symptons? In other posts, it has been suggested that a differential may be repaired by the bakc-yard mechanic - so how much should this cost? Thanks alot - Jeremy 1983 944
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Jeremy 2005 Cayenne S 2001 996 1986 951 |
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04-22-2003, 10:33 AM
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Join Date: Feb 2000
Location: Kingsport, TN
Posts: 2,935
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My 951 has been whining for several years in 2nd and 3rd. It's going to keep whining until it breaks. Then I'll have it rebuilt.
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Lawrence 1986 951 2002 SLK32 AMG 1987 328GTS 2011 528i |
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04-22-2003, 11:29 AM
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Join Date: Dec 2002
Location: South Dakota
Posts: 1,131
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I have a wind in first gear with my newer tranny, but I don't even worry about it. Mine is just my R&P being pissy. Find out if yours makes the sound in one gear or every gear. I wouldn't worry about it unless it does it in everygear.
BTW-My old tranny made a weird sound on decell. But that was with the crack R&P, cracked spider gear, and a broken carrier; basically a BIG oops on my part.
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95 240sx-track slut w/ too much done to list 87 944 n/a-old "toy" that broke too much |
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04-22-2003, 11:37 AM
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Join Date: Feb 2001
Location: Viera FL
Posts: 5,642
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Some whining is considered normal - a good gear oil can help.
Excessive whining and or groaning could be bearings. I would bute the bullet and get some Swepco (avail here at pelican) It is really good stuff - a little pricy, but very good. Drain tranny - observe what comes out - some silvery dust is normal, chunks are bad. refill with the good stuff and re-evaluate AFJuvat
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Es geht nicht darum wie schnell man faehrt, sondern wie gut man schnell fahren kann. Ihr Brunnen der nutzlosen Porsche Information |
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04-22-2003, 11:11 PM
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Join Date: Feb 2000
Location: Kingsport, TN
Posts: 2,935
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I bit the bullet and put Mobil 1 in my tranny a couple of weeks ago. The 1 to 2 shift is smoother now.
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Lawrence 1986 951 2002 SLK32 AMG 1987 328GTS 2011 528i |
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04-23-2003, 04:13 AM
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Join Date: Dec 2001
Location: Cordova, TN
Posts: 1,222
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I went with AF's advise and used swepco. The trany got alot quieter. I am not sure but I have heard that whining is caused by a cracked ring gear. Mine whines in first at low spead I am not worried about it.
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Roger Hall 81 924 N/A Some people are like Slinkies. Not really good for anything, but you still can't help but smile when you see one tumble down the stairs. |
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04-23-2003, 03:18 PM
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Join Date: Apr 2001
Location: NC
Posts: 411
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Rear torque tube bearing? This car is 20 years old.
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Dave951M 86 951 Blitzwagen 82 931 Basket Case (for now) |
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04-24-2003, 06:43 AM
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