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      04-10-2021, 03:55 PM   #23
MarcoZandrini
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I just changed the transmission fluid in my manual transmission. The fill and drain plugs are 9mm, and not 8mm.

Last edited by MarcoZandrini; 05-21-2021 at 01:16 PM..
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      04-10-2021, 04:37 PM   #24
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Any pictures ? I was planning to do mine soon
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      04-11-2021, 11:26 AM   #25
MarcoZandrini
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Quote:
Originally Posted by iv-128i View Post
Any pictures ? I was planning to do mine soon
Sorry, no pix. It's pretty straight forward. The part that took the longest time was removing the plastic aerotray that sits under the transmission. There are a bunch of 8mm screws to remove. The transmission fill plug is partially blocked by a tubular support bar on the right side. I had to get the ratchet with the 9mm allen bit above the bar. That limited the rotation of the ratchet.

ALWAYS remove the fill plug first. Why? Supposed you remove the drain plug and can't get the fill plug off. OOOOOPS!

Last edited by MarcoZandrini; 04-11-2021 at 01:15 PM..
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      04-11-2021, 06:40 PM   #26
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Ok thank you for info ! Will be doing this soon
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      04-12-2021, 10:31 AM   #27
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Quote:
Originally Posted by iv-128i View Post
Ok thank you for info ! Will be doing this soon
Glad to help.
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      05-01-2021, 06:44 PM   #28
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Maybe a stupid question... Can you do this on ramps or does the car need to be level to fill the transmission properly?

Thanks for the help.
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      05-01-2021, 07:33 PM   #29
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I did it today, had car on ramps in front and jack stands behind to be level. All other cars I did in the past had to be level, so I assumed this one is the same.
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      05-02-2021, 12:38 AM   #30
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Quote:
Originally Posted by iv-128i View Post
I did it today, had car on ramps in front and jack stands behind to be level. All other cars I did in the past had to be level, so I assumed this one is the same.
Thanks! That's exactly what I was thinking. I still find lifting these cars to be somewhat a PITA.
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      07-10-2021, 09:21 PM   #31
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Tried this today in my '17 M240i, but ran into many issues. There's some sort of bracket directly in front of the fill plug that made it very hard to access. Pretty sure I stripped the plug (8mm allen) and barely if at all turned the plug, which will be a wonderful little situation to fix soon. Luckily, I didn't drain it first, so the car isn't a 3500 lb. paperweight.

Anyone know what that bracket is? Any advice for getting out that fill plug?
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      07-10-2021, 09:23 PM   #32
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Quote:
Originally Posted by watermelon3878 View Post
Tried this today in my '17 M240i, but ran into many issues. There's some sort of bracket directly in front of the fill plug that made it very hard to access. Pretty sure I stripped the plug (8mm allen) and barely if at all turned the plug, which will be a wonderful little situation to fix soon. Luckily, I didn't drain it first, so the car isn't a 3500 lb. paperweight.

Anyone know what that bracket is? Any advice for getting out that fill plug?
Do you have a picture of the bracket?
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      07-10-2021, 10:46 PM   #33
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Quote:
Originally Posted by watermelon3878 View Post
Tried this today in my '17 M240i, but ran into many issues. There's some sort of bracket directly in front of the fill plug that made it very hard to access. Pretty sure I stripped the plug (8mm allen) and barely if at all turned the plug, which will be a wonderful little situation to fix soon. Luckily, I didn't drain it first, so the car isn't a 3500 lb. paperweight.

Anyone know what that bracket is? Any advice for getting out that fill plug?
were you using a ratchet ?
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      07-11-2021, 10:43 AM   #34
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Did you read this post ? 9 mm and a bar in the way.


Quote:
Originally Posted by MarcoZandrini View Post
Sorry, no pix. It's pretty straight forward. The part that took the longest time was removing the plastic aerotray that sits under the transmission. There are a bunch of 8mm screws to remove. The transmission fill plug is partially blocked by a tubular support bar on the right side. I had to get the ratchet with the 9mm allen bit above the bar. That limited the rotation of the ratchet.

ALWAYS remove the fill plug first. Why? Supposed you remove the drain plug and can't get the fill plug off. OOOOOPS!
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      07-11-2021, 12:51 PM   #35
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Quote:
Originally Posted by EEBreh View Post
Do you have a picture of the bracket?
Yes; it's not really a bracket, but I wasn't sure what to call it exactly. "Tubular support bar" sounds about right.


Quote:
Originally Posted by ScottSinger View Post
were you using a ratchet ?
I was using a torque wrench, not set to any torque level, with an 8mm hex bit socket; OP stated 8mm, and I couldn't find any service guides online. It seemed to fit pretty snug in the drain plug (which I didn't turn but just put it in to test) but I'll buy a 9mm just to see if that helps. Yes, using a torque wrench to loosen something is a bit weird, but it's the best tool I had for leverage.

Last edited by watermelon3878; 07-13-2021 at 07:14 AM..
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      10-16-2021, 08:08 PM   #36
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2016 model here, plugs were both 8mm for me. No issue getting a torque wrench in there. Bolt was a little tight and I was really tight on space, hit it with a little PB blaster and off it came. Shifts like butter! Instant improvement.
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      11-25-2021, 03:31 PM   #37
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I changed my MT fluid this morning. Whoever put that bar there is a sadist. Otherwise it went smoothly. Didnít even knock over an open bottle of oil while trying to maneuver under the car! (This time.) I did notice that more fluid (few hundred ml) went back in than came out. I didnít see any signs of leakage so I assume itís fine. The car was leveled on ramps and jack stands and filled until I got drips.

I used Motul Multi DCTF (claimed to be MTF LT-5 compliant) simply because Iíve had a heck of a time finding OEM fluid. It felt good on a short test drive. Iíve noticed the occasional 4th gear lockout when cold so I figured fresh oil canít hurt.
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