Changing fluid in Strange 12 bolt??.....

Okay, I lost my break in "cheat sheet" for my Strange 12 bolt. Do I need to get LSD additive for my Eaton HD Posi? I remember what fluid I needed but not the LSD additive. Just for future reference what posi need it and what doesn't? Unless you have a spool or a pegleg rear then is it always needed? Thanks for any information offered.

Always use the additive, I buy it at gm dealer.

And dont use synthetic oil!!!!

John

Make sure you use some plumbers tape to seal the bolts in or you might have leaking issues.

Thanks for the info gentlemen.