Or drill through the magnet...

 

Can you drill thru a magnet without it shattering? Usually holes are formed when the magnets are pressed but theyre pretty brittle. I would think drilling and putting a plug in the cover might be a better long term approach.

 

I've never tried drilling through a magnet but I'd say it's worth a shot. Or if not then drill a non magnetic plug and run that for one session to get temp data. One session without a magnet won't hurt anything.

 

Is the rear cover steel sheet metal? Id bet you could get temp from the outside if you insulated one spot from direct air. The cover is going to saturate in temp with the oil. WIll act as a buffer from immediate temp swings but if you have immediate swings their is probably a bigger issue.

But Im starting to get on the same page of adding more sensors and deciding what I care about later rather than guessing. I really want to add a lot more data logging to what I have now and its really making me want a standalone like a Linkecu so I can build a more robust system. Maybe I should make a thread on it...

 

Rear cover is cast Al. I wouldn't waste time taking exterior temps.

 

Ahh, ok. Couldnt remember but yeah def would get temps from an alum cover.

 

at speed the diff will splash enough oil around for the probe to be fully submerged... Just take a look at some od the Banks videos on diff covers.. it is mayhem in there at speed..... EUDM E9 has a temp probe in the gearbox and it is placed in the fill hole..

 

interesting idea using the inspection cover that would work actually for the T case.

Im looking to make a custom billet rear cover for the rear diff so can prob have a probe port added to this.

Yea dallas esp with me cause i have a flat floor and i want to fully enclose it but i need to monitor diff temps first see if i need to install naca ducts or coolers etc to the diffs.

 

if anyone is curious. Oil is everywhere when the vehicle is in motion. Temperature probe placement doesn't matter as long as it's inside the diff.

The rear diff cover has a nice flat spot right above the fill hole. Either move the fill bolt up to this location for more oil capacity and a submerged sensor, or just put the thermal sensor above the fill hole for simplicity.

 

I believe the Banks videos mentions that overfilling a diff is a bad idea. Unless I'm remembering it wrong.

 

it will leak out trough the driveshafts when it stands still... if overfilled..

 

I could see that. I thought I remembered them saying it caused a problem with operation of the ring gear.. hell, I can't remember. Maybe I'm mixing that up with engine oil LOL

 

Of course drilling and tapping for a sensor creates one more potential failure/leak point. My EGT plug/probe just will not stay tight in my stock manifold under track conditions. I’m probably going to seal the plug in for good with high heat JB Weld (since I can’t weld and the manifold is coated).

 

Fluid temp sensor probes are pipe thread; I've never had one come loose. EGT probes are different.

 

Too much oil can cause the oil to pressurise in the diff. Which can cause seals to fail, will normally blow out the vents first if the vents arent blocked up.