Rear diff

[86camota]

So, I think my rear diff is making noise, but before i dive into it, I was wondering if anyone had a picture/diagram of how its laid out. The main points of interest are the fill/drain plug for the fluid.

Any and all help is much appreciated.

thanks in advance

1990 toyota corolla all trac(yeah, I typed it. lol)

[RogueMoog]

Always make sure you can remove the fill plug with no problems before removing the drain plug... other than that, I (or someone else if they beat me to it) can take a pic of the FSM pages with the rear diff info and send it to you. (ToyotaNation doesn't allow anyone to post them publicly in the forum.)

I have a 1988½ FSM, though. Not sure how different the rear diff would be from an 88 to a 90.

[86camota]

Well, after looking at the rear end before tearing it apart, I noticed a nice little drip, (by little, i mean more then id like it to) coming from the brake drum. So i have narrowed it down to 3 things. 1. bad axle seal, 2. bad wheel cylinder, and 3 both.

so since i need to do brakes anyway for the rear, im just going to change both as i change the shoes and drums. ill take some pics and post what goes on when i get to it this payday.

[86camota]

okay, so i have another question on what kind of gear fluid i should use in the rear diff. what weight and all that?

[Mr.Nutcase]

Originally Posted by 86camota

So, I think my rear diff is making noise, but before i dive into it, I was wondering if anyone had a picture/diagram of how its laid out. The main points of interest are the fill/drain plug for the fluid.

Any and all help is much appreciated.

thanks in advance

1990 toyota corolla all trac(yeah, I typed it. lol)

Sounds like a bearing is going out....
How is the noise? Are you accelerating/dec? or the noise is present al the time?

[86camota]

Originally Posted by Mr.Nutcase

Sounds like a bearing is going out....
How is the noise? Are you accelerating/dec? or the noise is present al the time?

The noise is present all the time. during accel/dec. My guess since it is leaking gear fluid is the axle seal is bad and causing the wheel bearing to go out.

[RogueMoog]

Originally Posted by 86camota

okay, so i have another question on what kind of gear fluid i should use in the rear diff. what weight and all that?

According to the Factory Service Manual...

API GL-5 hypoid gear oil

Viscosity:
Above 0ºF - SAE 90
Below 0ºF - SAE 80W-90 or 80W

Capacity:
1.2 quarts

[86camota]

Originally Posted by RogueMoog

According to the Factory Service Manual...

API GL-5 hypoid gear oil

Viscosity:
Above 0ºF - SAE 90
Below 0ºF - SAE 80W-90 or 80W

Capacity:
1.2 quarts

Sweet, thanks.

Now does the transfer case take the same gear oil? If so, how much?

[RogueMoog]

Transmission / transfer case do, yes. I'll have to get the info after work later today.

[86camota]

now thats a bad wheel bearing.

[RogueMoog]

Damn, I forgot to get the info for you...

Capacity: 5.3 US qts

[86camota]

Originally Posted by RogueMoog

Damn, I forgot to get the info for you...

Capacity: 5.3 US qts

now is this for the tranny or transfer case? and same fluid as the rear diff?

[RogueMoog]

I'm pretty sure the tranny/transfer case (for a manual tranny) are connected, so that the oil added in fills both. I replaced the oil in mine a while ago, I seem to recall that there are two drains and one fill. Same guidelines / oil as the rear diff that I gave above.

That wheel bearing...

[86camota]

Originally Posted by RogueMoog

I'm pretty sure the tranny/transfer case (for a manual tranny) are connected, so that the oil added in fills both. I replaced the oil in mine a while ago, I seem to recall that there are two drains and one fill. Same guidelines / oil as the rear diff that I gave above.

That wheel bearing...

sweetness. thanks again for the help.

And yeah, that bearing was pretty bad