1SUPER70 Posted May 14, 2004 Share Posted May 14, 2004 An additive to you auto-transmission fluid that stops small leaks. Lucas Oil has a product shown in their catalog. Quote Link to comment Share on other sites More sharing options...
wallaby Posted May 14, 2004 Share Posted May 14, 2004 I have used stuff like that in customer's cars. There are lots of brands that sell a similar product for engine, trans and power steering system leaks. Generaly what they do is they have an additive that will attack and swell rubber it comes in contact with. It will soften up old brittle seals but if it stays in contact too long, it would ruin the rubber part. Seals and cork/rubber gaskets react to this stuff and might swell up enough to stop a leak if it is minor. What makes it work is that they only use a small ammount of the additive, and engine heat will make it evaporate out of the mix in a short time so it is considered safe to use. Open a bottle up at the parts house and you will smell it. Of course the container says something like: "Guaranteed to stop all leaks, if it doesn't, mechanical repairs may be needed." Quote Link to comment Share on other sites More sharing options...
jim's 70 Posted May 14, 2004 Share Posted May 14, 2004 I have used several of the lucas products and found they ae the only additives that do anything. I put the trans additive in my dodge p-up and the shifts firmed up noticably. I ran it for 20k then sold the truck so I don't know if there was any long term problems, Jim Quote Link to comment Share on other sites More sharing options...
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