maroon harpoon

We have a 1979 Toyota that had a leaking differential, so today we pulled the rear-end, replaced the gasket (stopped the leak!) and found a quarter-sized hole on the top of the differential with a smaller hole, threaded, that looks like it held something in the hole...our book shows nothing of the kind and I wonder if anyone knows what that hole is for......and would pass the info on to us!

Thanks in advance!

Tim

PismoJoe

Differential Breather? Much smaller than quarter sized though, should be on the top of the differential housing

1981 yota

any pics

PismoJoe

This has an extended diff breather tube attached, but its on the top left of the differential housing for reference if this is the part in question

Lysmachia

Google Toyota Diff Breather

https://www.yotatech.com/forums/f115...r-caps-158023/

http://www.google.com/search?sourcei...+diff+breather

And for SURE read this thread... https://www.yotatech.com/forums/f116...eather-113377/

Lysmachia

FYI people extend their diff breathers so that when going through water, the hot axle doesn't pull water into the differential and soil the diff oil. So if you drive through water higher than that hole, you need to do a diff breather extension like the pic above (both front and rear)

maroon harpoon

I didn't get a picture, but it is not the breather...the breather is on the axle housing, this hole is on top of the 3rd member, right in the middle...

I'll see if I can get a pic...

Tim

1981 yota

ok i just went out and looked at my axels there are only 3 holes, the breather,the drain plug, and the filler hole

maroon harpoon

Here is a pic...the arrow is pointing at the cork that I stuck in the hole...the hole is around the cork...

Tim

1981 yota

huh idk ive never seen a hole right there

tzonni

ABS Sensor, put a freeze plug in and call it a day, or go to pull a part and get a sensor and cut the wires.

1981 yota

ABS in a 79

tzonni

ABS in whatever that third is out of.

1981 yota

oh good point

myyota

I don`t think that is the original third member in that truck, that hole looks like its for an ABS sensor.

cws9685

yea plug it and you will be fine

PismoJoe

I think he already plugged it in the pic

maroon harpoon

Thanks for the replies! I thought perhaps it was for an ABS for whatever vehicle it came out of...suspicions confirmed!

Thanks again...

Tim

yotalaz

i have the same hole or mount for my diff i was told its for an e-locker so its for abs?. were they lying?

myyota

The hole is for the ABS sensor, not an e-locker, so yes they were lying to you, or they had no clue what they were talking about.