Trans input seal depth?

[eacmen]

Anyone have the spec for the trans input seal depth? I think i may have driven it too deep….

[Cubieman]

Most I have seen are right were the taper ends. I know thats not very specific however.

[JakeM346]

Anyone have the spec for the trans input seal depth? I think i may have driven it too deep….

Yep that’s too deep. BMW tool has a flat bottom.

[sapote]

If the seal lip not touching the bearing then it should be ok.

[eacmen]

Yep that's too deep. BMW tool has a flat bottom.

So its not supposed to be recessed at all into the flange? RMS and diff pinion are both recessed so I was assuming the same here. The one I pulled out was definitely recessed 1.5mm since i measured with calipers.

[JakeM346]

So its not supposed to be recessed at all into the flange? RMS and diff pinion are both recessed so I was assuming the same here. The one I pulled out was definitely recessed 1.5mm since i measured with calipers.

Yeah no recess at all.
Do you still have the old seal. Probably has been replaced already
Ill look for the special tool quickly

[eacmen]

Yeah no recess at all.
Do you still have the old seal. Probably has been replaced already
Ill look for the special tool quickly

Yeah i already replaced it. With minimal recess this time (about 1mm)

When I took the seal out I measured the depth from the flange to the nearest surface and it was 11mm. The seal had a depth of 7mm. In certain locations I had a dept of 4.3mm on the one I messed up. So it was good I changed it.

[sapote]

Yeah i already replaced it. With minimal recess this time (about 1mm)

1) When I took the seal out I measured the depth from the flange to the nearest surface and it was 11mm.
2)The seal had a depth of 7mm. In certain locations I had a dept of 4.3mm on the one I messed up. So it was good I changed it.

1) What is the nearest surface (that defines the depth of 11mm)?
2) 7mm is the thickness of the seal? And some sections of seal were crushed down to 4.3mm, from what?

[eacmen]

1) What is the nearest surface (that defines the depth of 11mm)?
2) 7mm is the thickness of the seal? And some sections of seal were crushed down to 4.3mm, from what?

1. nearest surface was the black plastic retention clip measured 11mm from flange face
2. yes 7mm is total thickness of the seal. But i had installed it with 4.3mm of depth from the flange face to the seal face.

[sapote]

1. nearest surface was the black plastic retention clip measured 11mm from flange face
2. yes 7mm is total thickness of the seal. But i had installed it with 4.3mm of depth from the flange face to the seal face.

1. I didn't know there is a black plastic retention clip in between the seal and the input shaft bearing. Anyone have a pic / drawing of this?

[///M3RIC]

1. I didn't know there is a black plastic retention clip in between the seal and the input shaft bearing. Anyone have a pic / drawing of this?

I happen to have my transmission out right now for a refresh. Image below is of the plastic retaining clip. It’s made of nylon 66. Some of the tutorials on YouTube for replacing the shaft seal recommend drilling a screw into the seal then using pliers to pull the screw and seal out. I got a bit too excited and drilled into this plastic clip we speak of. Not a part you can readily source. So that’s what I’m dealing with today.

And to the OP, you should be able to tell the previous depth by the change in sheen of the metal, it’s shinier where the seal was.

[sapote]

I happen to have my transmission out right now for a refresh. Image below is of the plastic retaining clip.

Is the plastic clip attached to the rotating shaft, or to the bellhousing? It makes sense if it's attached to the shaft as an oil slinger, as I don't see it serves any function if attached to the bellhousing.

[///M3RIC]

Is the plastic clip attached to the rotating shaft, or to the bellhousing? It makes sense if it's attached to the shaft as an oil slinger, as I don't see it serves any function if attached to the bellhousing.

The plastic clip (and the metal ring in front of the plastic clip) are mounted on the shaft. They rotate with the shaft, but aren’t necessarily attached because they can also move independently of each other.

I’m not sure of the purpose but slinging oil is a good theory.

[sapote]

The plastic clip (and the metal ring in front of the plastic clip) are mounted on the shaft. They rotate with the shaft, but aren’t necessarily attached because they can also move independently of each other.

I’m not sure of the purpose but slinging oil is a good theory.

Interesting.
when removing the BH and installing (smg to 6mt), the 2 pieces can interfere with the input shaft if people don’t see them behind the seal.

[sapote]

I got a bit too excited and drilled into this plastic clip we speak of. Not a part you can readily source. So that’s what I’m dealing with today.

The drill went too far issue won't affect this if the drill didn't touch the bearing, so you are ok as it is.