The GM coolant sealer pellets are they safe or will it plug the heater core? I'm trying to hold off a repair on a minor coolant leak from the head gasket on a '95 GM 2.2ohv.
Lucas claims it does, printed on the bottle:
Lucas Transmission Fix with ATF Conditioners - LP10009
Transmission Fix with ATF Conditioners stops slips! It's polymetric film renews worn bands to stop slipping. It cleans and lubricates sticking valves for proper shifting and controls heat and...
I used Wynns Trans stop leak for a minor leak in my Dodge 3spd auto trans, 4 days later the tranny wouldn't upshift anymore!!! Now I think I have other problems!
I've adjusted the front band, but the rear band is internal, the tranny shop says the bands are not the problem, although they didn't even want to adjust them. Rebuild or replace seems to be the mantra for the trans shops here!