Wiper Arms (again) (Page 2/2) theogre JAN 25, 10:40 AM quote Originally posted by PKFieroGT: Anyway... I remembered I have a shell of an 87 Fiero Coupe that I am parting out that still had the Wiper arm splines still on it. I knocked off the snow and ice yesterday (I'm up in Canada) and tried to fit the Dorman aftermarket arms on it. They fit MUCH better than on my 86 GT.... go figure. So, I presume there must have been a discrepancy between years or some models due to parts vendors etc... Just more proof of what I said above. I swapped low mile 86 wiper transmission to 87 car a few years ago because of binding in the pivots and didn't want to relube etc. Relube often is a pain and may not work if has bearing damage and not just GM but most other brands. I put wiper "balls" on top of each other and can't see any difference by eye. OE Fiero wiper arms didn't care and just use same 87 arms. Again, you can't trust year of car. Tolerance of a wiper ball and arm may change just enough from batch to batch not by model year. Means Your 86 87 cars might have different wiper trans batches and my 86 87 can have same batch of parts depending on exactly when car is made because GM et al do not junk leftover parts w/o a very good reason. For that matter, can't even say from car to car on assembly line because many parts just get stuff into same bins and may mix different batches. Car parts are not like food etc in a local store that must watch expire date for Milk or "rotten" Produce. qwikgta FEB 02, 07:23 PM when I did this I noticed that they fit, but were loose and the arms would not "work" like they should. So I drilled a small hole in the base, and into the threaded part on the car. Then tapped the hole with a small set screw and installed them. they work great and have not had an issue in over 5 years. PhatMax FEB 02, 07:35 PM Qwikgta….. brilliant idea….simple and effective.