First Time Gearbox Fluid Change

[Extreme1]

Everything looks good to me. Can someone with more experience tell me? I’m planning to put the cover back on and refill with Swepco 201.

[Fred Michael]

Looks good to me.
Slide the inner bearing race off of the lower shaft and put it in the bearing in the rear cover before installing the cover. It will make it easier to get the cover to slide on

[Extreme1]

Looks good to me.
Slide the inner bearing race off of the lower shaft and put it in the bearing in the rear cover before installing the cover. It will make it easier to get the cover to slide on

Hi Fred, okay thank you.

Should I replace or clean the magnet that’s in the bottom of the case? It’s got some fuzz on it. Do I have to remove the lower stack of gears to get to the magnet? Im not sure I want to do that in case it won’t all go back together.

Should I use Swepco 201 or something else? It looks and smells like Swepco that was in there.


Mike

[Fred Michael]

If you can reach the magnets, give them a wipe. If not I wouldn't worry unless there is something that looks important on it. There will always be a bit of fine material on them.
The stack slides on really easy and its no issue as long as you get everything back in the correct order
Gear lube is up to personal preference. The only thing I would say is definitely use a synthetic oil
Nothing wrong with Swepco

[Extreme1]

If you can reach the magnets, give them a wipe. If not I wouldn't worry unless there is something that looks important on it. There will always be a bit of fine material on them.
The stack slides on really easy and its no issue as long as you get everything back in the correct order
Gear lube is up to personal preference. The only thing I would say is definitely use a synthetic oil
Nothing wrong with Swepco

Okay thank you, I really appreciate your help.

[Darryl Wills]

The top gear second gear from the end looks like it may be wearing thru the surface hardness on the tooth that is at about 12 o'clock . That could be the source of the fuzzy stuff on your magnet.

[Greglab]

Looks good to me, but Darryl has looked at about 1000 of these, so I would defer to him. I use Mobil 1 synthetic 75/90 (recommended by O'Leary Motorsports).

There is a PFM reunion at Sonoma Aug 30-Sep 1, you should plan to come to that event.

[Lotus7]

Another caution to a first-timer: be gentle putting the rear case back on so as not to damage the gear position sensor drive (that small piece on the end of the shift barrel with the slots in it).

[David Ferguson]

I would remove the sensor before putting the cover back on. Of course, you may need to position it correctly before tightening it, so that the voltage reads correctly. Look in the Care & Feeding document, but you will find this info:

The ECU identifies the gear number based on a signal seen from the micro-switch and voltage
from the gear position sensor.
These signals can be viewed under ‘View – View Sensors’.

Gear Position is a rotary potentiometer located on the back of the gearbox and voltage should
read around the following values:
Neutral = .85 v
1st = 1.47 v
2nd = 2.08 v
3rd = 2.75 v
4th = 3.38 v
5th = 4.05 v
6th = 4.71 v
The Gear Position Sensor can be re-clocked to fix discrepancies

[Extreme1]

Thanks for all your responses guys, they’ve been a big help.