Flakito wrote: I have a problem with the Winstar box to root that they put an engine additive to the box to enter the drive abruptly changes well already changed the oil
If your box was fine to be put the additive? What brand is that additive? What is its consistency and for what is supposed to serve that additive?
We do not know if the additive really was the one that caused the problem or I only highlight it more, there are very bad additives that only swell the oil and probate more problems than they solve, there are other additives that help a lot, but you do not have to put anything to a box, their repair is nothing economical. There are some products to wash the boxes, in addition to removing the additive, it also helps to clean the varnishes and lacquers and sludge that is formed, you would have to make a washing to your box and then use a quality buna oil, already with that and depending on the type of fault you have, perhaps with other good quality additives you can solve your problem.