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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHOil leak - looks like gear box
Leading reported evidence
Use ) gearbox oil
Performed · outcome unconfirmed
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1
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Read evidence and context
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Performed · outcome unconfirmed
There's no mistaking (especially used) gearbox oil with motor oil smell.
Leading evidence: 'Use ) gearbox oil' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check clutch carefully' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
And check your clutch carefully for contamination.
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Suggestion · Original poster
A short while ago I had my gear box out to replace the RMS and clutch.
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Suggestion
Did you use an RMS insert tool to fit the new seal?
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15 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 1 discussions
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Generation: 20261026T144035Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hello - looking for some experience please.
A short while ago I had my gear box out to replace the RMS and clutch. All went back together without issues. I did about 80 miles, no visible leaks. I left the car for three weeks while away with work. Come back and there is an oil leak. I got the car in the air and it is coming from the joint between engine and gear box. Nothing above on either side, just at the bottom. The oil is dripping ever so slowly, but dripping. I put some card under the car and it has created a few drops over the last week, despite not using the car. I am pretty sure its gearbox oil - it very clean looking (golden) and doesn't smell the same as the oil on the dip stick.
So - question is could I have done something while refitting the gear box? Is it possible to damage the input shaft seal when taking the gear box out/putting back in?
Any experience gratefully received.
Thanks, Graham.
There's no mistaking (especially used) gearbox oil with motor oil smell. The fact you put it in somewhat uncertain terms and mention colour is confusing.
It does sound like RMS leak which is common if you let the car sit and heals itself if you drive it. I've seen it reported by people who had the RMS/IMS done professionally so if that's the case I wouldn't worry too much that it was something you did wrong.
There's also a crank plug to seal the oil gallery on the end of the crank shaft - just check it while you're there.
And check your clutch carefully for contamination.
Quick update. Managed to get the gear box out this afternoon. As expected, it's dry. I guess that's a good thing. I ran out of energy to remove the flywheel. So I will save that excitement for tomorrow to discover if the newly inserted (with correct tool) RMS is leaking...
Embarrassing pictures of how dirty my car is underneath...
It was actuall pretty easy. The only challenge is getting the car high enough. Currently my car is not high enough to be able to roll the gear box out on that lift. Fortunately I dont need to..
Last time I took the gear box out I did it on a two post lift with a friend. I think that was harder somehow, having the gear box balanced on a stand. They are super heavy.
Lets see how straightforward it is to get back in again.
