oil leak, gearbox?

[einesv996]

Hello

I have a 1999 c2 manual with 72000 miles.

Yesterday I find oil dripping from, as i looks, front end of the gearbox. The undertray is quite wet from oil, seems i must be oil under pressure, see pictures. On my inspection I did not find any loose bolts or anything wrong, or oil dripping form the gearbox itself. But as you see from the pictures, a lot of oil has been leaking.

As far as I concern there is no place in front end of the gearbox oil could leak from.No loose bolts or anything. So what happens here?

einsv996

[JFP in PA]

It is possible that could be left over from the last time the gearbox was serviced. Clean the area up, check the box to make sure it is still full, and see if it comes back.

[einesv996]

Thanks JFP, but it is not leftover from last service. The gearbox was serviced i 2012 and the car have been dry since then. This has occured relatively recently. A friend of mine suggested today a loose or broken seal at the reverselight- swich, could this be a possible cause?

I have not checked yet but what other problem can cause this? The first picture showes fresh oil in the undertray, on the next, the oil have spread over large aera under the car.

[JFP in PA]

Thanks JFP, but it is not leftover from last service. The gearbox was serviced i 2012 and the car have been dry since then. This has occured relatively recently. A friend of mine suggested today a loose or broken seal at the reverselight- swich, could this be a possible cause?

I have not checked yet but what other problem can cause this? The first picture showes fresh oil in the undertray, on the next, the oil have spread over large aera under the car.

The gearbox can also spring a leak where the linkage shaft enters the case. I think you need to get the car up in the air (on a lift) and shine some bright light in there to try to see where it is coming from.

[Augustus Barone]

My 1999 C2  has a completely dry exterior on the gearbox case, no leaks from shift linkage, or anywhere else for that matter. Gearbox level is normal.  Shifting is fine.Yet the  plastic  undertray has showed accumulated leakage evidence, and on a very hot day, a  oil spot on the driveway  showed up. The smell was clearly from  gear oil and, judging where the car was parked ,directly above the aforementioned tray. Cleaned everything up and wondering where this is going to proceed to, a mystery indeed...

[Augustus Barone]

Still noticing a  gear oil drop under the  transmission mount . At this point I am suspecting a crack or porous spot inside the casting surrounding  the   mount. Will be removing  the bushing to have a look see.  No other areas on gearbox show any oil trails or possible leak source . Will post findings 

[Augustus Barone]

Gearbox oil leak found . The reverse light switch was seeping, possibly due to impact while clutch replacement was done by PO. The leak got progressively more profuse and I finally was able to confirm source. 

[RFM]

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