Is Lucas transmission additive any good I used it twice in two different Chrysler transmissions which had some problems and they died 3 days after Was this a coincidence?

It's difficult to say whether the timing of the transmission failures was purely coincidental or related to the use of Lucas transmission additive. While Lucas is generally regarded as a reputable brand of automotive additives, its transmission additives have received mixed reviews from users. Some users report positive experiences, while others have experienced issues such as transmission slipping or fluid leaks after using the product.

It's important to note that transmission failure can result from a variety of factors, including mechanical wear and tear, fluid leaks, or underlying issues within the transmission itself. If your transmissions experienced problems only a few days after using the additive, it's worth considering whether there might be other contributing factors.

Seeking advice from a qualified automotive mechanic or transmission specialist would be recommended if you're experiencing transmission issues. They can assess the situation, diagnose the root cause of the problems, and recommend appropriate solutions, taking into account your vehicle's specific circumstances and needs.