944 Diff noise
Discussion
After much deliberation and advice from you guys I am saying goodbuy to my dear old 1982 2.7 944.
In its place is a very smart but highish milage S2.
The diff is fairly noisy but not terminal. Any reccomendations about where to go to sort it out? and what sort of money should I be paying?
In its place is a very smart but highish milage S2.
The diff is fairly noisy but not terminal. Any reccomendations about where to go to sort it out? and what sort of money should I be paying?
Looking at the same thing in my 944. My chaps recon about £350 all in to repair the worn bearings (if it is just pinions, possibly more if crown wheel needs doing too) and about the same to fit a secondhand replacement box.
Benefits of getting the bearings replaced would be that you know for sure that the noise will stop. Fit a second hand box and you may get the same noise and a nice bill to accompany it!
Cheers
Benefits of getting the bearings replaced would be that you know for sure that the noise will stop. Fit a second hand box and you may get the same noise and a nice bill to accompany it!
Cheers
Very occasionally, a noisy gearbox can be improved by simply changing the gear oil. For the sahe of 20 quids oil, it may be worth a try before shelling out hundreds.
It's supposed to be changed every four years, but when I was looking to buy mine, the vast majority had no evidence of it ever being done
As a noisy gearbox is a known and expensive problem I change my gear oil every two years just to be safe.
It's supposed to be changed every four years, but when I was looking to buy mine, the vast majority had no evidence of it ever being done
As a noisy gearbox is a known and expensive problem I change my gear oil every two years just to be safe.
Totally agree with diver944,
I bought an '84 944 in 2001, it had some diff whine in 4/5th at about 3000rpm, On it's first service the transaxle oil was changed for Swepco (from Berlyn Services), just sold the car on Sunday having done 40k in 4 years, The noise was absolutely no worse(if anything it seemed less noticable), I would change the oil first, see if that helps... Cheers
I bought an '84 944 in 2001, it had some diff whine in 4/5th at about 3000rpm, On it's first service the transaxle oil was changed for Swepco (from Berlyn Services), just sold the car on Sunday having done 40k in 4 years, The noise was absolutely no worse(if anything it seemed less noticable), I would change the oil first, see if that helps... Cheers
This is common, it's not striclty speaking a fault.
To be totally honest the car will be fine.
The symptoms are that "generaly" after a long run, there will be quite a louish grumbling/rumbling noise from the transaxel. (usually in idle)
This is to do with the 5th idler gear being slighly oversize or undersize (I can't remember which) and it rattles around.
When the 944's were new some of them got done under w'tee. It is a Porsche design fault.
Rebuilding the dif will fix this but it does not effect performance or fail. Just ignore it
hope this helps
To be totally honest the car will be fine.
The symptoms are that "generaly" after a long run, there will be quite a louish grumbling/rumbling noise from the transaxel. (usually in idle)
This is to do with the 5th idler gear being slighly oversize or undersize (I can't remember which) and it rattles around.
When the 944's were new some of them got done under w'tee. It is a Porsche design fault.
Rebuilding the dif will fix this but it does not effect performance or fail. Just ignore it
hope this helps
bite-me said:
This is common, it's not striclty speaking a fault.
To be totally honest the car will be fine.
The symptoms are that "generaly" after a long run, there will be quite a louish grumbling/rumbling noise from the transaxel. (usually in idle)
This is to do with the 5th idler gear being slighly oversize or undersize (I can't remember which) and it rattles around.
When the 944's were new some of them got done under w'tee. It is a Porsche design fault.
Rebuilding the dif will fix this but it does not effect performance or fail. Just ignore it
hope this helps
The 5th gear idler rattle (only present at idle with the clutch disengaged) is different to the whine common to lot's of 944, where your rolling and usually under load ,on my car it dissappeared on a constant throttle.
Apparently this can be the differential bearings, you can check this by looking for up/down (NOT in/out) play in the transaxle output where it connects to the CV joints, there is a tolerance spec for this, but I can't remember where? Mine had a tiny(I'm talking miniscule) amount of play on the right hand side, I checked this regularly and it never seemed to get any worse
>> Edited by HearingAidBeige on Saturday 15th October 00:17
HearingAidBeige said:
This is common, it's not striclty speaking a fault.
To be totally honest the car will be fine.
The symptoms are that "generaly" after a long run, there will be quite a louish grumbling/rumbling noise from the transaxel. (usually in idle)
This is to do with the 5th idler gear being slighly oversize or undersize (I can't remember which) and it rattles around.
When the 944's were new some of them got done under w'tee. It is a Porsche design fault.
Rebuilding the dif will fix this but it does not effect performance or fail. Just ignore it
hope this helps
The 5th gear idler rattle (only present at idle with the clutch disengaged) is different to the whine common to lot's of 944, where your rolling and usually under load ,on my car it dissappeared on a constant throttle.
Apparently this can be the differential bearings, you can check this by looking for up/down (NOT in/out) play in the transaxle output where it connects to the CV joints, there is a tolerance spec for this, but I can't remember where? Mine had a tiny(I'm talking miniscule) amount of play on the right hand side, I checked this regularly and it never seemed to get any worse
>> Edited by HearingAidBeige on Saturday 15th October 00:17
a whining noise is usually going to be the pinion bearing, a runbling noise is likly to be the 5th idler gear.
Here's my experience with Porsche transaxles, it worked well, and I recommend it.
www.network54.com/Forum/message?forumid=426130&messageid=1125602339
'Dogsharks
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