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YOUR RESEARCHtransmission fluid
Leading reported evidence
Fill with 9 qts
Performed · outcome unconfirmed
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Read evidence and context
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Performed · outcome unconfirmed · Original poster
The trans & diff are drained from the same plug and filled with 9 qts.
Leading evidence: 'Fill with 9 qts' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check metal sludge there' (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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Replace every 30,000 miles or about once every two years
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Performed · outcome unconfirmed
I recommend that your transmission fluid be changed every 30,000 miles or about once every two years.
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Performed · outcome unconfirmed
I used a hand pump kit from the dollar store to pump the fluid into the gearbox.
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When I rebuilt a C3 'Vette, I used a hand syringe I purchased from the local autoparts store.
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Suggestion
Just use an open pipe as gear oil is pretty thick stuff and it slows it down a lot if you use the trigger also the open pipe can just be pushed into the fill hole.
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Suggestion
Filling the fluid will be the most painful part, I don't know how you guys do it, I end up use a hand squeezed oil bottle to pump the fluid into the side filling hole, took forever.
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Took my 1999 C2 Cab. to Porsche dealer to get estimate on gear box fluid change.
Quoted $470 for both transmission and rear diff.
Here's the question, he said, quote,"The trans/diff fluid change is $470.80 plus tax. the trans/diff is the same drain plug with 9 qts of fluid."
The trans & diff are drained from the same plug and filled with 9 qts. Can this be right, same drain plug? They share a plug?
Does this mean they are connected and are filled thru a common fill plug?
Thought they used different fluids.
Someone set me straight.
Thanks,
A carrera 2 has whats called a transaxle. The transmission and differential are the same unit.
That said, his 9 quarts number is so ****ing wrong I don't even know what to say. The transaxle typically holds approximately 4 quarts.
That quote is outrageous. The fluid costs roughly $160 at full list and the labor shouldn't take more than 1 hour.
Realistically, this is a very easy job to do yourself.
The person who provided the quote does not know what they are talking about or they are confused about what service you were asking for. Ask to speak with someone who knows what the duck they are talking about.
One of the easiest tasks to perform on your manual transmission Carrera is to change the transmission oil. The Carrera transmission is what is known as a transaxle. It includes all the standard components of a normal transmission, plus an integrated differential. This design is possible because of the rear-engine design of the Carrera. The transaxle design is more compact and theoretically lighter in weight since you don't need a dedicated differential.
The differential and the transmission both share the same lubricating fluid. It's very important to make sure that the fluid in your transmission is at the proper level, otherwise your transmission will experience significant wear. The synchro rings and sliders all depend on a slick surface in order to match speeds when shifting. If your transmission is low on oil, the wear on these components will accelerate significantly. In addition, shifting the car will be more difficult. One of the first things that you should check on a 911 Carrera that is having problems shifting is the level of the transmission oil. Keeping the differential and all the associated gears well lubricated should also help increase your fuel mileage.
The transmission oil also helps to keep temperatures down inside your transmission. The engine is one of the primary sources of heat for the transmission as it conducts and radiates through and around the points where the engine and transmission are mounted. The transmission also creates heat itself as the gears and synchros turn within its case. Keeping the transmission fluid at its proper level helps to mitigate heat problems. Having a large reservoir of oil to spread the heat throughout the transmission helps to keep temperatures down. On some of the higher-performance Porsche transmissions, there is even an external transmission cooler that operates similar to the engine cooler.
I recommend that your transmission fluid be changed every 30,000 miles or about once every two years. This number is a rough estimate and may vary depending upon your use of your 911 (track versus street). There are many moving parts in the transmission, and they have a tendency to drop small microscopic metal particles into the oil. Specifically, the synchro rings wear down slowly over time, actually with every shift. While the transmission bearings are not as sensitive to oil contaminants as the engine bearings, they can still exhibit wear from these particles in the oil.
The Carrera transmissions have two plugs for filling and emptying the transmission oil, located on the side and the bottom of the case. A 10mm hex socket is all that is required to remove both the drain plug and the filler plug.
The transmission holds about 2.8 liters (3.0 quarts).
(this information comes from Pelican Parts)
http://www.pelicanparts.com/techarti...sion_Fluid.htm
A few more points:
- try to drain it when the transmission is still hot
- the bottom drain plug has no magnet (at least on mkII) but there's a magnet inside the transmission next to the bottom drain plug toward the rear of the car. Use your pinky to check for metal sludge there
- fill until oil drains out of the fill plug. I have the factory manuals and never found any mentioning of the 11mm reference stated in the Pelican DIY
http://www.renntech.org/forums/tutorials/article/64-manual-transmission-oil-change-instructions/
Filling the fluid will be the most painful part, I don't know how you guys do it, I end up use a hand squeezed oil bottle to pump the fluid into the side filling hole, took forever.
When I rebuilt a C3 'Vette, I used a hand syringe I purchased from the local autoparts store. Has a flex tube about 18" long; large body, about 2" diameter by 12-15" long. Relatively inexpensive and well-suited to the job.
I totally agree with Ahsai about fill to level ^^^ I have not found the 11mm below the fill hole advice / guide anywhere else either. Every gearbox I have ever filled uses the fill to lip method. It has worked for me on the 98 C2 6 speed. I would add that when I do my old Land Rover I use a converted
garden sprayer
. Put in the
required
fluid amount just under 3 litres for the Porsche (Mine) and pressurise. Just use an open pipe as gear oil is pretty thick stuff and it slows it down a lot if you use the trigger also the open pipe can just be pushed into the fill hole. When its empty yopu have the correct volume of oil in the box.
O_Sr
I did this last year. The previous owner used Redline oil and I hated it for daily driving.
I bought 3 quarts of the Porsche gearbox fluid. I used a hand pump kit from the dollar store to pump the fluid into the gearbox. Even if you don't do it yourself, a shop's hour worth of labour would run you, what, $90 - $120/hour depending on where you go?
$470 is outrageous.
If you DIY take the fill plug out first. Sometimes it is very difficult to get out, if you strip the hex after you drain the trans you are stuck with a tow to a shop.
This is a source reference. Confirm exact model applicability in the original material.
