I have a 1991 with belt problem. I purchased a year ago and previous owner warned of belt problem. Belt was squeaking and replaced several times due to squeaking to no avail. Belt dressing works for a while. I had no problems until last week, I just let it squeek, but gave a liberal soaking and squeek free for a few days then frayed. I replaced belt with best quality belt and it frayed again a few days later? All pulleys seem to be in proper alignment and are tight. I do not see a belt tensioner. Any advice or assistance would be appreciated.