G50 drain and Fill plug size - 10mm or 17mm

[cicsprog]

Going to change out G50 fluids. I've done some searching and see 10mm and 17mm allen wrench as the supposed size for drain and fill plugs. Which is the right one?

[vash]

peek underneath? i imagine the two sizes would be obviously different.

if they are like a 915 tranny..then it is a 17mm..dunno about yours

[KTL]

G50 is 10mm inhex (allen key)

[Bob Kontak]

I see two magnetic plugs on the bottom and then one big plug on the side that appears to be the fill plug. It has a male hex vs the SC's 17mm female hex.

Does not say the tool size in the PET but I ain't seeing anything that looks close to requiring a 17MM allen wrench.

[cicsprog]

W/O jacking the car up, I can't tell. Looking from distance, looks like fill plug is 10mm and drain is 17mm. Bently manuals look like 17mm (crazy they don't say). I have PET also and it doesn't say - crazy. Performance WEB site sells a 17mm for socket set and say its 17mm for 88.

I have a 17mm but better get a 10mm. Excuse for more tools I guess.

[Bob Kontak]

Drain would be on the bottom, correct? Does the pic I posted align with yours?

Can you see the bottom plugs in your PET?

[cicsprog]

Originally Posted by Bob Kontak

Drain would be on the bottom, correct? Does the pic I posted align with yours?

Can you see the bottom plugs in your PET?

Nope.....can't see bottom.....its part 13 in the diagram....99906300802.

https://importecautoparts.com/parts/part_number/999%20063%20008%2002/3

That's no help either

[cicsprog]

Ok...arrived home. 3/8 almost fits the drain plug. So, must be 10mm. Hopefully, fill plug is also (can't jack that side while in garage). KTL is the winner at 10mm. Thanks for the inputs.

[drola]

what oil are you planning on putting in there?
i need to do my g50 also

[wildcat077]

Originally Posted by drola

what oil are you planning on putting in there?
i need to do my g50 also

Seeing that you're in Florida which is lots warmer than Montreal you might benefit from a thicker synthetic gear oil !
I've been using Quaker State full synthetic 75W140 gear oil for the last three years in my G50 and my car sees around 15 track days per season and all i can say is that it's a fine oil for my application.
I change it every year and it's almost the same color as new when i drain it ...

I know everybody has their own perception as to what works for them,all i'm saying is this oil works great for me and i will stick with it as long as it's still available.

Cheers !
Phil

[kidrock]

Mobil Delvac fully synthetic is most recommended

[cicsprog]

Originally Posted by drola

what oil are you planning on putting in there?
i need to do my g50 also

Mobile 1 75w 90 Synthetic. It makes shifting MUCH smoother. One of the few products were I actually felt a change in performance (other than using thin toliet paper ).

[cicsprog]

Just a follow up. 10mm is the right hex head for G50. Make sure you buy one of the inexpensive pumps to get the gear fluid from the container into the transmission - not sure there is another way if you don't. Very messy job but doable.

[gamin]

Mobile 1 Delvac 75w90 synthetic. Great stuff. Not cheap.

[brakedw]

Whats the volume you need to buy for a refill? I can only find delvac local in very large volumes?
Thanks

[sig_a]

Originally Posted by cicsprog

Just a follow up. 10mm is the right hex head for G50. Make sure you buy one of the inexpensive pumps to get the gear fluid from the container into the transmission - not sure there is another way if you don't. Very messy job but doable.

Not a messy job at all.

Go to Sears or Walmart etc. Buy one of those long (18"or so), narrow funnels. It will have a nail hole tab on the upper lip. Connect about 10 or 12 feet of clear vinyl tubing (5/8" i think) to the end of the funnel using a hose clamp to secure the two together. Now hang the funnel on a small nail located about 5 foot above the garage floor. Then string the vinyl tubing down and thru the left rear suspension directing the end toward the fill plug positioned on the side of the gear box. Fashion a bend into a 1/2 inch piece of copper tubing. Then insert this nozzle into the open end of the vinyl tubing. Secure copper nozzle with another hose clamp. The crook in the nozzle will hook into the fill port. Make the copper nozzle about 6 or 7 inches long. You may want to cut the nozzle in half along the straight portion to create a tube stiffener. Then force this straight stiffener into the open end of the tubing about 2 inches deeper than the tube end. Then force the remaining straight end of the crooked nozzle into the open 2 inches, where it will butt up against the inserted straight stiffener piece. This will result in a flexible joint which will help retain a clear pathway for the oil to enter the fill port. Without the stiffener, the vinyl tubing has a tendency to kink, closing off flow of the oil before it exits the nozzle and into the fill port. To fill, carefully pour transmission fluid into the funnel hanging on the wall. Gravity will do the rest. A 3.2 liter G50 Carrera holds 4 liters or almost 1 gallon. Simple, fun DIY project.

[KTL]

Originally Posted by sig_a

Not a messy job at all.

Go to Sears or Walmart etc. Buy one of those long (18"or so), narrow funnels. It will have a nail hole tab on the upper lip. Connect about 10 or 12 feet of clear vinyl tubing (5/8" i think) to the end of the funnel using a hose clamp to secure the two together. Now hang the funnel on a small nail located about 5 foot above the garage floor. Then string the vinyl tubing down and thru the left rear suspension directing the end toward the fill plug positioned on the side of the gear box. Fashion a bend into a 1/2 inch piece of copper tubing. Then insert this nozzle into the open end of the vinyl tubing. Secure copper nozzle with another hose clamp. The crook in the nozzle will hook into the fill port. Make the copper nozzle about 6 or 7 inches long. You may want to cut the nozzle in half along the straight portion to create a tube stiffener. Then force this straight stiffener into the open end of the tubing about 2 inches deeper than the tube end. Then force the remaining straight end of the crooked nozzle into the open 2 inches, where it will butt up against the inserted straight stiffener piece. This will result in a flexible joint which will help retain a clear pathway for the oil to enter the fill port. Without the stiffener, the vinyl tubing has a tendency to kink, closing off flow of the oil before it exits the nozzle and into the fill port. To fill, carefully pour transmission fluid into the funnel hanging on the wall. Gravity will do the rest. A 3.2 liter G50 Carrera holds 4 liters or almost 1 gallon. Simple, fun DIY project.

That's a lotta work to fill up a trans!

I get the car up on four jack stands fairly high, crawl under there with one of the aforementioned cheap parts store oil pumps attached to a milk/windshield washer fluid gallon jug filled with my gear oil. Lay under there and pump for a while, done. No custom hose creation required.

[sig_a]

Originally Posted by KTL

That's a lotta work to fill up a trans!

I get the car up on four jack stands fairly high, crawl under there with one of the aforementioned cheap parts store oil pumps attached to a milk/windshield washer fluid gallon jug filled with my gear oil. Lay under there and pump for a while, done. No custom hose creation required.

-------------------
What a waste of money. But for those kind of people.........have at it.

[KTL]

Your post came across as showing the rest of us how we were doing it wrong, always making a mess. I simply added my two cents on how to avoid the mess by using a gallon jug that costs nothing. The pump costs like $4. What'd your ingenious solution of hose, long slender funnel and copper tubing cost? Probably not a whole lot less.

Pump comes in handy for other things like pumping brake cleaner from my 5 gal pail I bought from NAPA, which I put in a refillable spray can, to save from buying endless cans of the stuff. So it pays for itself pretty quickly.

To each his own. Your solution sounds like a waste of time fiddling with 10 feet of freakin' hose.......

[aread]

Resurrecting this thread with a question: Does anybody know the part number or place to buy the fill plug for the G50? I believe its part 14 in the diagram? The link that cicsprog posted is for the drain plug. Are they interchangeable?