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Preventing helicopter noise from reoccuring

Posted: Sat Apr 20, 2019 6:45 am
by fuxxy
Just pulled my trans out of my 2005 Freestyle AWD. Mileage is +/- 100k, and CVT had never been serviced.

I've read tons on the cause of the helicopter noise, identify what parts are damaged, and how to replace the damaged components.

Has there been any research into how to keep the new input shaft from pitting? I'd hate to do all this work just to roll the dice on the same thing happening again?

This job has been a nightmare to do at home, and i havent even split the transaxle case yet. I dont mind putting in the effort, i just want to make sure I only have to do it once.

Re: Preventing helicopter noise from reoccuring

Posted: Sat Apr 20, 2019 4:50 pm
by ds32928
As I understand it, the chrome plating on the input shaft flakes off which allows the bearing that rides on the shaft to wiggle a little with the chrome gone, and hence larger tolerances between the now nude shaft and the bearing race. Wear gets worst, and the noise starts.

How do you plan to fix, replace, repair the input shaft? Someone posted a link on the forum to this shaft, but as far as I know, no one here has bought one and reported back.
https://www.ebay.com/itm/CFT30-CVT-Tran ... 8350!US!-1

Most guys just replace the bad trans with a used one, and hope they get whatever mileage is left in the replacement trans. Not all the trans's had failure of the input shaft, so its a crap shoot buying a used one online, just to be able to look at the input shaft condition. BTW, did the input shaft still have the rubber O ring on the end? Some guys said when they pulled the trans they thought the missing o-ring might of been scraped off into the torque converter.

Re: Preventing helicopter noise from reoccuring

Posted: Sat Apr 20, 2019 6:45 pm
by fuxxy
Havent gotten the case halves split yet, so i havent been able to inspect the bearing surface. However, the O-Ring at the end of the input shaft is just gone. No trace of an O-Ring on the shaft, no shards in the torque converter, nothing.