Mavrik Posted November 9, 2018 Share Posted November 9, 2018 (edited) Looking at changing my gearbox/transaxle oil in my S but can anyone that's done it confirm the quantity of oil required? I gather the capacity should be 2.8L but I've read somewhere else that I'll need more than 3L ?? Looking at using the full synthetic Gulf Syngear 75w/90... Edited November 9, 2018 by Mavrik Link to comment Share on other sites More sharing options...
Popular Post SpannerMan Posted November 9, 2018 Popular Post Share Posted November 9, 2018 If you've got a 3.4 with a 6 speed box then 2.8 litres is about right. The 5 speed box takes less. I've never known more than 3 litres though. Bearing in mind you'll likely have to buy 3 litres anyway, is to top it up - 6 speed is all standard sockets, 5 speed uses a spline drive and a hex socket. - Jack car up on all corners, if you have access to a lift then it's far easier. The car must be level. - Allow oil to cool, you should check the level first. Open the filler plug, if it's a 6-speed then stick your finger in, if you can feel the oil level then it's about right. The 5-speed requires a special dipstick, or bent paper clip. Level should be about 10mm from the bottom of the filler hole. - Put filler plug back on, warm engine and gearbox up, let it run for 20 minutes. Now remove drain plug, all oil to fully drain, make a cuppa, check the drain plug for metal shards and bits. Clean them up. Torque drain plug to 18ft/lbs - Using a pump, fill oil to the levels described above. Torque filler plug to 18ft/lbs. 1 3 Link to comment Share on other sites More sharing options...
DKR_77 Posted November 9, 2018 Share Posted November 9, 2018 Did mine last year, 3 litres gave me a drop left, I’m not sure you could overfill it either unless your car was massively unlevel when you filled it. 1 Link to comment Share on other sites More sharing options...
Peopleandcars Posted November 9, 2018 Share Posted November 9, 2018 How many miles on car? When recommended? Link to comment Share on other sites More sharing options...
Woodhouse Posted November 10, 2018 Share Posted November 10, 2018 I changed the gearbox oil in both the Gen 1 S cars we owned back in the spring. I used exactly 3 bottles of Redline 75W90NS in each, at 1 US Quart or 946 ml each, so a total of 2.838 litres nominally. I carefully leveled the cars on axle stands and in both cases, they were slightly overfilled from new as oil ran out when I removed the fill plug. I probably ended up getting around 2.8 l into the box, allowing for dregs in the bottles and fill pipe and this just about brought the level to the overflow point so pretty much perfect, being between the level quoted in the workshop manual and what had actually been installed at the factory. Make sure the suspension is not loaded when you remove the rear subframe braces for access to the drain plug. Also, I bought a length of plastic pipe so I could stick a small funnel in the end and secure it in a static position alongside the car and simply pour the three bottles in, standing up. This seemed a lot easier than laying under the car using my oil syringe to fill it up. 1 Link to comment Share on other sites More sharing options...
Woodhouse Posted November 10, 2018 Share Posted November 10, 2018 (edited) 10 hours ago, Peopleandcars said: How many miles on car? When recommended? For the Gen 1, it is 12 years or 120k miles IIRC. One of ours was around 95k, the other around 77k miles. Edited November 10, 2018 by Woodhouse Extra detail added. 1 Link to comment Share on other sites More sharing options...
Mavrik Posted November 12, 2018 Author Share Posted November 12, 2018 (edited) On 10/11/2018 at 08:49, Woodhouse said: For the Gen 1, it is 12 years or 120k miles IIRC. One of ours was around 95k, the other around 77k miles. --------------------------------------------------------------------------------------------------------- Mine is on 64k but for my peace of mind it isn't that expensive to ensure it's done imo. Im debating whether to remove the subframe braces or just drill a suitable sized hole!?! Edited November 12, 2018 by Mavrik Link to comment Share on other sites More sharing options...
Popular Post Bushman Posted January 2, 2019 Popular Post Share Posted January 2, 2019 just done my gearbox oil change. I used about 3 litres of Motul 75w90 motylgear. We had to remove the rear chassis braces and gearbox protection plate to get access to the drain plug. I should have taken the opportunity to drill an access hole to facilitate the next one but didn't really have a chance, then thought that the next change wouldn't be for at least 4 years, so sod it. If it helps anybody here though, to save having to remove the chassis braces (which are prone to strip seized mounting bolts) You can carefully holesaw a 40mm to 50mm diameter hole through the aluminium bash plate to gain access to the drain plug. Position wise, the hole centre needs to be 19mm (3/4 inch) to the LHS, nearside or kerbside on a UK car, of the existing small drain hole centre and about 6mm (1/4 inch) in front of this small hole. I suggest you slide a piece of steel plate between the gearbox and bash plate to prevent damage to the gearbox with the drill. you also need a short centre drill in the holesaw. We had to thoroughly soak all the chassis bolts in penetrating oil for a good 24 hours to reduce the risk of snapping or stripping the mounting bolts for the braces before we dared to try and remove them but they all came undone ok in the end. The old oil must have done at least 20K miles, maybe lots more. considering, it wasn't a bad colour and didn't glisten with metal particles either but it did Bloody stink!!. We did it on my mate Kali's 4 post lift whilst the old girl was in for a good service and MOT. wouldn't like to do it on the floor. Not that I could get my Xmas belly anywhere near the underside of one of Mr Porsche's finest. 1 1 Link to comment Share on other sites More sharing options...
Mavrik Posted January 8, 2019 Author Share Posted January 8, 2019 @Bushman ... Cheers for the heads up re drilling the access hole... That'll be my plan when I also put my GT3 master on... Alas, I'll be doing it all on stands/jacks on the blinkin road!! I'll be using Gulf Syngear 75w/90 1 Link to comment Share on other sites More sharing options...
Mavrik Posted January 8, 2019 Author Share Posted January 8, 2019 Just about to pull the trigger on a 57mm HSS Erbauer hole saw... Link to comment Share on other sites More sharing options...
Bushman Posted January 12, 2019 Share Posted January 12, 2019 57 sounds ok for Heinz or Wesley Snipes but might be a bit large for the access hole. an accurately drilled 45mm hole should be enough. Link to comment Share on other sites More sharing options...
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