gear oil/transmission fluid

Oberon · Post by **Oberon** » Mon Oct 30, 2006 11:51 am

I'm sure that this subject has been beaten to death but I am fairly new to the Pinz world. I bought my 710M a couple of months ago and would like to go through it and change the fluids. I've read the posts on this site and was looking for a little more info. How much fluid do I need to buy? I'm planning on using Amsoil 80w90 for the gear lube but not sure about the gearbox(trans). There seems to be quite a few opinions on the subject. Also, is there any special procedures that I need to follow, or things that I should look for? Any help would be appreciated on both the procedure or opinions on fluids.
Thanks in advance,
Spence

Kiwibru · Post by **Kiwibru** » Mon Oct 30, 2006 12:39 pm

I faced the same problem recently. Here is what I did. I used Redline 80w GL-4 synthetic in the transmission. I used a Chevron 75-90W petroleum based oil in everything else. Tranny will take about 7L (qt.) and the rest of the fill will take you at least 2 gal. The reason I used a basic petroleum based oil in the the other portions of the drive train was because I had that oil on hand, it meets the MIL spec. required and if I get a leak in the outside gear boxes the fluid will not ruin the brake shoes.
Others may have different ideas and scenarios. (i.e. it doesn't seem to be written in stone...)

Wayne Roberts · Post by **Wayne Roberts** » Mon Oct 30, 2006 1:14 pm

Oberon - You are correct when you say that there are many schools of thought concerning the fluids for our trucks. The one thing that you must be carefull with, is the tendency for full syn oils to leak past the older seals. I am running the normal oils for lube in my truck for that reason. The trans requires ONLY GL-4. Do not use GL-5 as it is too slick for the syncro's and will cause a failure. Napa sells it in quarts and you will need more than 2 but less than 3. Follow the procedure that is outlined in the repair book and don't forget to remove the fill plugs first! That way if a fill plug is frozen you will still have oil in the assembly.

Oberon · Post by **Oberon** » Tue Oct 31, 2006 8:49 am

thanks for the info guys. i think that you are right. i'm going to go with conventional.
thanks again,
spence

Oberon · Post by **Oberon** » Tue Oct 31, 2006 1:45 pm

While shopping around for Redline MT90 for my gearbox, I stopped at Napa and noticed that they had an 80w85w90 premium gear lube. Anyone know the difference from regular 80w90??? Just wondering, never heard of it before.

Kiwibru · Post by **Kiwibru** » Tue Oct 31, 2006 3:46 pm

Probably a GL-5 rated lube that has viscosity "enhancers" so that it covers the whole spectrum of potential uses. As long as you don't use it in the tranny which needs GL-4 you are fine. I seem to remember that the Pinz requires a MIL SPEC 2105 rating so I look for a lube that meets that for the gear boxes & reduction units.

lindenengineering · Post by **lindenengineering** » Tue Oct 31, 2006 10:07 pm

Gents GL4 is getting a bit hard to find, and only two major manufacturers still blend it to that spec to my knowledge, those being Pennzoil & Texaco.

If you talk to the oil companies/reps you will find that "most " oils have blend tolerances for GL2, 3, 4 & 5 applications.

Those bottles you have seen at Napa are a wide tolerance lube oil and will do just fine.
By the way look on the back in the small print you will see "Ashland Oils".
Now look at a Valvoline bottle on the next shelf. On the back yes, Ashland Oils. You just paid about a $1.20 more for the same bottle that you will be bunging in the waste barrel.
It's caveat emptor again1
Dennis

SDPintheLBC · Post by **SDPintheLBC** » Wed Nov 08, 2006 8:33 pm

I'm using Swepco 201 in everything and no leaks, shifts like butter. Very popular for Porsche transaxles and other europeans. Although it's not synthetic, I believe it's GL-5. I'm very satisfied, though.

75pinz · Post by **75pinz** » Sat Nov 11, 2006 2:02 pm

I use one quart Redline 30wt motor oil and one quart 75w90 in my trans. The rest is plain 80w90. I find it to shift better in cold weather.

pinz for fun · Post by **pinz for fun** » Sat Dec 02, 2006 12:36 pm

I USE ROYAL PURPLE MAX GEAR 75W50 SYNTHETIC NO LEAKS LESS NOISE GL4 AND GL5 OK FOR BRASS THANKS D

IF YOU CANT HAVE FUN DONT GO

Scooter · Post by **Scooter** » Wed Aug 08, 2007 9:40 pm

I have changed all the gear boxes with 80W-90 GL-5 Citgo brand (Ashland) and some Shell left overs. Now for the tranny? I looked for GL-4 and could not locate any.

What do you recommend? Any sugestions?

Scooter

Twebba · Post by **Twebba** » Thu Aug 09, 2007 12:28 am

I found some at a local ranch supply store (Murdoch's).
I reckon they carry it for tractor use, but what they hay?!? GL-4 is GL-4.

- Also noticed some online while hunting it down:
http://www.builderdepot.com/browse.ihtm ... oreid=4791

Good luck!

Scooter · Post by **Scooter** » Thu Aug 09, 2007 6:30 am

thanks, looks like they call it 90w, maybe I can search by that too.

Scooter

PinzEOD · Post by **PinzEOD** » Thu Aug 09, 2007 8:04 am

Any NAPA store has GL-4, or can order it.

Jerbearyukon · Post by **Jerbearyukon** » Sat Mar 15, 2008 10:06 pm

What about up where I live...Most people use sythetic in the diffs because of the COLD.

I just want to be as easy on her as I can. Had to pull the clutch cylinder apart today cause she was leaking. Replaced the o ring...could find one like the one in it, but I just added anothe one - seems to have sone the trick.

I also had to pull the speedo cable out cause the o ring in her was leaking. Learning lots about being a mechanic now.

That speedo is sure tricky...with the pin in there and no manuals yet.

Jer Bear

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