1989 Justy 38,000 miles CVT. At 3500 Rpm while accelerating there is a driveline shudder in the car. Back off the gas somewhat, the shudder goes away then even back at 3500 RPM it is gone. If you cruise at 3500 RPM in D it is not there. When accelerating thorugh 3500 to 3800 RPM it is there. 3500-3800 RPM in Ds and R there is no shudder. Rev the engine in neutral no shudder. NO check lights are on. I may look at the brushes again but when I inspected them a few years ago they had very little wear (34,000 miles). I may change the CVT fluid but i think it is more in the clutch then anything else. Tis car is a blast to drive and I hope this isnt a big problem to worry about.
Reading in the FSM (brand new off ebay 15.00!) it mentions low speed range clutch slip as the throttl;e position switch being out of adjustment. The TPS on these things is just a big switch. 3500 RPM is mid range but usually the car is acceleraiting about 20-30 mph so I dont know if that counts as low range on a CVT.
Sorry for the odd cut and paste color but I dont know how to fix that.