Thanks for posting that link. I've been planning to change the tranny fluid in my CJ3B which was in there when I bought it. Definately a little nervous as to what might drain out.
Matt

Macgraham - that's exactly what mine looked like. I was kicking myself for not taking a pic to post...but you nailed it. How long have you been using that oil? What's the history of your transmission? Recently rebuilt or unknown?

Macgraham wrote on 03/17/13 at 23:45:52:


So yours is about the same story as mine. At least we caught it when we did. There are undoubtedly countless other transmissions - in jeeps and otherwise - that have been soaking in this corrosive fluid for much longer than 1 year and you don't hear of it being any sort of mass epidemic. Change out the fluid, hope for the best, and keep on rolling.

I had the same experience with some CRC straight GL4 oil.  Back of the bottle said it wouldn't hurt yellow metal but they too lied.  It wasn't in there long because I found a thread that talked about the misleading claims that different manufacturers make.  There was a slight amount of brass color, like Carlsjeep, but any is too much.  I'm back to the mineral oil but if I lived farther north I would have to look a little closer because I'm sure the cold weather would have to be taken into consideration.  It got down into the low 40's (BRrrrr) here and I noticed a difference in the shifting.  I just read a post on the new members forum about a member driving his new jeep at -27 in CANADA - THAT SHOULD BE SOME KIND OF A RECORD.

Ryan,
You may have spotted this one, but here is my most recent experience with metal eating gear oil.

http://cj3apage.com/forum-yabb/YaBB.pl?num=1360175221

Macgraham - I ended up with NAPA Part Number: NHF 65205 which is a 5 gallon pail. The 1 gallon jug is NHF 65201.

Tim - I do remember your posts but I didn't realize they were as recent until I re-read them and checked the dates. Seemed like eons ago, not last month. I think I was trying to subconsciously deny having to face my own impending disaster.

1oldracer wrote on 03/18/13 at 03:01:41:

I've been watching this thread with great interest.  This particular post from 1oldracer caught my interest because, like him, I believed what it said on the back of the bottle.







I called the Technical Service number and spoke with a tech-rep.  He told me that part of their testing and manufacturing process requires the statements on the back of the bottle to be certified.  He assured me that yellow metals are safe in GL-4.
I asked if they make a GL-1 and he said that they do not.  He said that there isn't much call for it because it's only for farm equipment.  I thanked him kindly and didn't come away very "assured".  
I completed my restoration 5 years ago.  I wasn't aware of the yellow metal problem at the time and after the transmission overhaul I put GL-5 in it.  One year later I saw the gear oil looked like matalic gold paint.  I had to go into the tranny for other reasons and by this time, after installing new brass parts, I was aware and in good faith installed GL-4.  Last fall when Carl Darnell was here, we pulled my tranny to install a new pilot bushing.  We didn't drain the oil, but had to pull the top plate and shifter.  At that time we looked for the matalic color in the gear oil but didn't see any.  I'm going to be putting my Jeep back into service soon as the days are getting nice once again.  One of the things I'll do is check the gear oil for metalic contamination.  If there is any at all I will follow so many of you now to the GL-1.
I asked this question last month when Tim got us going on this same issue, "Why are we having to discover this problem by our experience?  Why hasn't someone like Carl Walck been on top of this for some time?