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Registered
Join Date: May 2002
Location: Massachusetts
Posts: 480
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Major rumble/rattle with load at low RPMs
When I turn into my driveway, I need to come to almost complete stop and turn up a hill into my driveway. If I leave the clutch out, I am asking the 3.2 to power up the driveway at about 1,200 rpms in 1st gear. I usually am usually greeted with significant rattling from the tranny/back end which goes away as the rpms rise above 1600. If I attempt the same turn in second, the rumble/rattle is much worse (due to lower prms and longer time to accelerate). I thought this might be the heat shield flapping under the cat or some other loose sheet metal. Nope. Now I think it is a tranny issue. Obviously asking the engine to push hard at such low rpms with the clutch out is not a good idea but the rumble/rattle seems unusual. I would expect engine lugging but not this.
Any thoughts?
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CWL '86 Carrera Coupe '88 Carrera Cab '02 525i Sedan |
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06-04-2004, 10:29 AM
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Location: Massachusetts
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More info: This happens on the '88 G50 and not the '86 915.
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CWL '86 Carrera Coupe '88 Carrera Cab '02 525i Sedan |
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06-04-2004, 10:34 AM
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Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,639
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My 87 (no LSD) does this and so does my friend's 86 (LSD). But mine is MUCH louder. The 86 is barely perceptible. If I put my car in 5th @ around 1500rpm? Oh my is it loud. Doesn't go away 'til 2000.
I imagine it's differential or ring & pinion chatter. Geary or John Walker (just to name a few) would have a good idea what this condition is a result of.
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Kevin L '86 Carrera "Larry" |
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06-04-2004, 10:44 AM
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Join Date: Mar 2003
Location: Excelsior, MN
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I think this is typical of some of the G50 clutches. I get the same sound comming away from a stop sometimes or when trying to park. My wrench said not to worry about it.
I do believe the June issue of Excellance spoke at length about this on the 87-89 3.2's. Also said not to worry. -W
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"88 Commemorative Edition Carrera - RIP replacement - "90 Carrera 4 |
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06-04-2004, 10:47 AM
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MBruns for President
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It's the springs in the clutch plate rattling - load and low rpm's do it in the G-50's
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Current Whip: - 2003 996 Twin Turbo - 39K miles - Lapis Blue/Grey Past: 1974 IROC (3.6) , 1987 Cabriolet (3.4) , 1990 C2 Targa, 1989 S2 |
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06-04-2004, 10:48 AM
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Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,639
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Quote:
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Kevin L '86 Carrera "Larry" |
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06-07-2004, 08:57 AM
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Join Date: Apr 2003
Location: Maitland, Florida
Posts: 892
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Back in 96 I nearly bought a really nice G-50 Carrera with less than 30k miles.But, on the test drive, the gear/clutch rattle was so bad I thought the tranny was coming apart. I couldn't believe a car could be sold with such a rattle.
In retrospect, I should have bought the car. It was really a fine car. Jerry Kroeger
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82 911SC Targa (05 Boxster S ) gone, but not forgotten 87 Suzuki GSXR-1100 1953 MG TD Mk II |
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06-07-2004, 09:24 AM
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Gone to California
Turbo
