Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - m20 to be installed!
View Single Post
  #2 (permalink)  
Old 04-23-2010, 11:09 AM
cobalt327's Avatar
cobalt327 cobalt327 is offline
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Posts: 5,031
Wiki Edits: 1616

Thanks: 128
Thanked 616 Times in 565 Posts
My M20 took about a quart and a half. Buy 2 quarts and use what you need.

You want to fill it after it's installed so all the moving, tipping, etc. that's done during the install doesn't create a mess from leaks from the ends. In my case, filling was easiest to do through the shifter boot from inside the car- but be sure you do not drip any on the carpet! Use a big old towel, etc. to keep things clean- the smell lingers.

The correct fill level is similar to a diff- fill to the bottom of the plug- or slightly less (you just want to be able to wet a pinky finger when inserted).

Amsoil's 75w-90 GL4 MTG lube is what I've used. I had no experience w/synthetic lube like this before using it, but there have been no issues since using it and the tranny ran and shifted fine.

BTW, GL-5 spec lube is said to be hard on brass- don't use it unless it specifically says OK for use w/brass tranny components. Some synthetic GL-5 lube is said to be compatible w/the Muncie's guts- but check first! Or, just use GL-4 and don't worry about it. lol

Good luck.
Reply With Quote