GTO transmission fluid

66 GTO · 09-13-2007, 11:51 PM

I have 66 gto with a 69 gto 400 motor and a 4 speed manual transmission, I went to change the tanny fluid today and on the passenger side of the transmission is what i think is the filler bolt, but i can not find the drain bolt. could someone please tell me where the drian bolt is?

macgto7004 · 09-14-2007, 11:07 AM

Hey 66 GTO,
As far as I know, the Muncie M20 and M21s did not have a drain plug. Early M22s didn't either. I have heard that somewhere along the line, the M22 got a drain plug in 1970.
I think the M21s have a boss cast into the case that can be drilled and tapped for a drain plug, but they never left the factory with one.

You will probably have to get a little pump and feed a hose into the fill hole and take the lube out. then you can refill it in the reverse.

I hope this helped, and anyone, please correct me if I am wrong.

Russ

66 GTO · 09-14-2007, 07:21 PM

Ok, well thats how ill change the oil, thanks for the help Russ.