The ZF oil is good for the lifetime of the trans. At some point the old oil will cause the trans to fail, hence at the end of the trans life,,, LOL . Does anyone really know why the cams are failing? Bad oil or bad cam?
I really hope that mine doesn't eat one. But my trans is starting to really act up in the morning when cold. Trans shift goes 1-2-3 oK THEN 3-4A few times with a bump. When warm it's all ok.
I went with Synergy because it all adjusts easily without removing it. Their suite has lots of info on their springs with a lifetime warranty. I hear they are going to build a 4 link triangle rear kit. .
So I have to put in a word for my Synergy suspension parts. As you see I have it all. It's all top quality. Easily adjusts. Will be adding the Rock Crawler 4 link in the rear then it will be done.
A few words about the RockKrawler kit. The supplied new upper arms are solid steel. The diff bracket is all welded 1/4 inch steel. Everything is best quality and solid. The powder coat is perfect. No part of this kit is going to ever fail. Looking forward to an easy install.
To do the flash I have to deal with the Tazer. then re do the Tazer. My Jeep dealer said that a re flash would not fix it. I wish the thing would just die. I hate waiting for the failure. My cold 3-4 shift is a real bump. I have looked and called several places and no one knows much about the ZF...
I got no CELs or codes. Dealer says there is no problem and this is all normal. He has not mentioned my warranty possible void due to many mods. I am at 28K so it will probably go a long time.
I hate to keep bringing this up but mine is still doing the hard cold shift into reverse in the morning and a weird shift from 3 to 4. All just one time when cold. As soon as it warms up a bit or has shifted a few times it's all good. But something is not right. I am sure I am not alone with this .