TC Module O ring

The o ring in my transfer case module is shot and allowing it to leak, causing the flashing 4 and 4LO lights. Does anyone know the part number for this o ring or if I can just get one from hardware store?

edit: this is the shift motor, not the module I guess.

 

AFAIK Toyota only sells that as a complete unit, if you can get the measurements off the Oring the site below probably will have it but shipping is expensive if you just get a couple things.
https://www.oringsandmore.com/

Check/replace the vent hose going to the actuator while your there, wouldn't hurt to check the ones on the ADD and rear locker too while your there.
https://www.tacomaworld.com/threads/4wd-system-operation-help-thread.742420/

 

Ideally OP @TrdAaron has a calipers they can use to take exact ID, OD, & thickness measurements.

Prices at that Orings website look very reasonable, as does shipping, which starts at $7 via USPS.

For example, this is 11 cents per O-ring with a min. quantity of 10 rings = $1.10.

If you do end up measuring & locating a perfect-fit replacement O-ring, do share the part #, dimensions, and source here for future reference.

 

SAE O-rings go by dash numbers (eg -204 is 3/8" ID and 5/8" OD ~1/8" thick).
https://www.oringsandmore.com/oring-size-chart/

Metric O-rings go by exact measurements not part numbers unless a manufacturer lists a part number.

 

Great, thanks everyone! Unfortunately I don’t have calipers, but I roughly measured it at ~3.25 diameter (that is not exact so don’t take it as a measurement!). I got a o ring kit from Lowe’s, but none of them fit. So I did some surgery on one and band-aided it with a little bit of grease for the time being, until I can find the right o ring.

I may just replace the whole thing… it’s given me problems before but I’ve managed to fix it every time.

 

These aren't Mitutoyos or Starretts but they get pretty good reviews & will probably get the job done for this kind of application, if you're interested. $16 is about as low as it gets.

$20 Digital Caliper Measuring Tool, Stainless Steel Vernier Caliper Digital Micrometer with Large LCD Screen, Easy Switch from Inch Metric Fraction, 6" Caliper Tool for DIY/Household

https://www.amazon.com/Measuring-Stainless-Micrometer-Fraction-Household/dp/B08Y8M54M9/