Original GM Positraction Additive
- AC Delco Lubricants
- # 10-4003 & 88900330
- 4 Oz. Bottle
- TWO bottles required per 10 or 12 bolt rear end
If you’ve ever put together a posi rear end in your Camaro or Firebird and forgotten this little bottle, you know how important it really is. So, if you don’t have the additive…the posi differential is noisy and clunky. Plus, the rear end will chirp the tires as you go around a corner. The GM Positraction Additive is specifically formulated to keep clutch pack chatter and wear to a minimum while providing proper lubrication. Add one bottle to the posi rear end as you are filling it with gear lube.