Changing Transmission Fluid

[nylart]

I want to change the fluid in my 84 911. Can someone tell me what size/type tool you use to remove the fill and drain plugs.

TIA,

Art

[vash]

i hope you dont need a 17mm allen socket. but that may be the case. sometimes the PO would have switched over to the standard hex nut plug which would make the chance of having the tool better. take a look to see what you have. if you have the allen plug confirm that it is a 17 and pick up a cheapy somewhere. then i used a standard hand pump to pump almost 1 gallon of swepco into my tranny. the hand pump works great if you take off the drivers rear tire so you can run the hose into the tranny from the outside. i couldnt imagine pumping away from under the car. piece of cake. pump till you overflow. i jacked the front of the car up too, just so i would be somewhat level for the overflow to be accurate.


cliff

[Randy Webb]

Don't remove the air vent on top of the unit out of confusion.

Do take out the fill plug first so that -- if it's stuck -- you won't have an empty trans.

Best thing is to not rely on what _should_ be there, but look and see what _is_there. Just in case a PO modified the plugs....

[SilverPoly]

I'd do as unfixed says and take a look as to see what type of plug you have.

A lot of guys also use Swepco as I do. A good upgrade is to get the magnetic fill plug. That way you have 2 magnetic plugs that pick up tiny debris rather than just one.

[Sonic dB]

Pelican sells the magnetic plug and 17mm hex tool. Its important to use the proper tool as to not strip the hex edges out. If the plugs are on there tight, try a shot of PB Blaster and leverage with a breaker bar. Use Swepco 201 and hand pump with long hose from outside the car up into the tranny. Jack up both rear wheels and put them onto jackstands so they are even and to prevent tipping and spilling.

[HarryD]

I just did an tranny oil change.

I drove the car for 30 minutes to warm the oil in the tranny.

When I jacked the car up, I made sure it was level.

The PO was kind enough to put outy plugs in for me.

I used a bit of antiseize on the threads when I reinstalled so it would be easier next time.

I was too cheap to buy a $7.00 pump. I used a $1.00 funnel and 4 ft of 3/4" tubing (another $1.00). I stuck the hose onto the funnel and the other end was shoved into the tranny fill hole. I held the funnel above the wheel and slowly poured my pre heated (in a pan of hot water) SWEPCO 201 downthe funnel. I did this to add about 3 quarts. When the oil was running out of the fill hole I stopped.

All in all, pretty uneventful.

[vash]

preheated tranny fluid? wow, that is a good idea. like a big baby bottle of warm milk!

[HarryD]

BTW - SWEPCO 201 is recommended only for older 901 and 915 Trannys with the Porsche Design Syncros.

If you have one of them modern G-50's, I hear Mobil 1 Gear Lube is for you.

One way to tell is to see if your clutch is cable or hydraulically actuated. The 901 and 915's use the cable.

[HarryD]

On a related concept, what is the acceptability of using a bolt with a 17 mm head and two nuts to pull the allen head plugs in place of getting the giant 17 mm hex wrench?

[UTKarmann_Ghia]

BTW, you can also pickup the 17mm hex socket at most auto stores.

[vash]

Originally posted by HarryD
On a related concept, what is the acceptability of using a bolt with a 17 mm head and two nuts to pull the allen head plugs in place of getting the giant 17 mm hex wrench?

i got my drain plug on the gas tank off this way. i dont know if i would do it on my tranny. i remember reading a horror story here on the bbs about some dude and his stripped out 17mm.

[azasadny]

Harry,

I use the same technique you do. I also heated the gallon of Swepco 201 in my laundry tub full of hot water for 30min or so, worked great!!

[Randy Webb]

17 mm bolt ok if it fits tight and doesn't get slanted.

IF plug is tight use Kroil/PB/etc. and shock -- a lot of taps with a metal hammer.