|
|
|
|
| Author |
|
|
Stu - 72 RS Rep
Join Date: May 2008
Location: Sydney Australia
Posts: 6
|
901 rattling noise in 5th? Or MFI Cams related?
I have recently had the engine and gearbox out to replace a broken clutch pivot pin, and now have a new noise comming from the transmission. Before I go back to the garage thought I would check with the oracles.... :
 (I also had the MFI pump belt replaced at the same time) Fifth gear has always been a bit "whiney".... but now I get a rattling noise at precisely 2400rpm in fifth, but only when under load, and coming down hill, and not when the clutch is depressed. It is most apparent when going up a hill in fifth underload and under part throttle. Its a strange oscillating noise / rattle. Could it be the flywheel? Could it be the fifth gear getting worse? Is it related to the MFI pump belt/cams? Car is a 72E RS Rep, with a 70 2.2S to 2.5S with matching engine, gearbox and MFI setup. Cheers, Stu |
||
05-24-2009, 03:11 AM
|
|
|
Stu - 72 RS Rep
Join Date: May 2008
Location: Sydney Australia
Posts: 6
|
Sorry meant to say that it does "NOT" occur coming down hill or when the clutch is in.
(I had the MFI belt and "CAMS" replaced) |
||
|
05-24-2009, 03:13 AM
|
|
|
Max Sluiter
|
S cams do not like low revs. You should not be using 5th gear at 2400rpm under load.
My 911 transaxle makes noises like that, especially low in the rev range and coming away from a stop. 5th gear whine is common.
__________________
1971 911S, 2.7RS spec MFI engine, suspension mods, lightened Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance |
||
|
05-24-2009, 11:59 AM
|
|
1971 Porsche 911S
