Differential filler plug

[M Peter Leifert]

Anyone know where I can get the rubber plug in the differential. Mine has a little leak. I'm not sure about pulling the plug because after 36 years it just may come out in pieces. I need one as a replacement. I'm trying the manufacturer. Any other source? Thanks.

 

[simo]

Some has used this:

Dorman Differential Cover Plug 090-062​

 

[M Peter Leifert]

Some has used this:

Dorman Differential Cover Plug 090-062​

Hi... Thank you. Says it doesn't fit but I'll get one anyway.

 

[simo]

It should work.
You can read this one below.
GTA Dorman 090-062 Usage Link

 

[M Peter Leifert]

Super! Thanks again.

 

[M Peter Leifert]

Me Again... The gear oil in the differential is the original. I've had the TTA for 36 years and never had a reason to change it. GM specifies lubricant 1052271 which is an 80W-90 GL-4 plus a limited slip dif additive. I assume that the original in 1989 was not full synthetic. Reading a lot of tech comments has me totally confused now. What gear oil do you suggest? The one in the excellent link you sent me shows a 75W-90 plus an additive. I wish I wasn't so dumb about this.

 

[M Peter Leifert]

FYI... The Dorman Differential Cover Plug 090-062 seems to be a good fit.