TRANSAXLE OIL CAPACITY?

Per the ZF Manual - 3.5 Liter.

I would add 3, then let it settle for a day, then add the other 1/2 liter until it just barely spills out of the filler hole.

Rocky

Thanks Rocky ...

Yes, 3.5 liters or 118.349 ounces. I found it best NOT to use the wife's measuring cup to pour out 10 ounces from a fresh 128 oz. gallon before pouring the remaining amount in the ZF.

Thanks again.

Is 80W90 GL-5 okay to use? It's virtually impossible to find brand name (Valvoline, Castrol, Pennzoil, etc.) in GL-4 anymore.

usmcfred
'72 Pre-L #3041

Exactly what grade and brand and specification of gear oil to be used is a topic that will continue to elicit many different views and opinions.

I personally discussed this issue with Lloyd Butfoy a year or two ago and his basic advice is that it really doesn't matter PROVIDING:

... You use a quality gear oil of the 80 to 90 grade range.

... You change that gear oil every year, without fail.

This simple maintenance routine is all the transaxle requires. All any additional discussion will provide is that there are many different approaches as to how to accomplish this. Brand, grade, synthetic, limited slip additives, etc

K.I.S.S.

Flame suit on.

Larry

Previous post is correct. Just scroll to the "find" button at the top of the page and enter "ZF Oil" and you will have a number of suggestions & opinions.

Usmcfred,

Penngrade (AKA Brad Penn, formerly Kendall) makes a mineral based GL-4 80W-90 gear oil. They call it Classic gear oil and you can buy it online from Amazon, Summit, Jeg's, etc.

If you want synthetic, Redline makes 75W90 gear oils in both GL-4 (MT-90) and GL-5 (75W90 NS).

Thanks everyone. I LOVE this Forum!

Just ordered the Brad Penn GL-4 80W90 from Summit Racing.

usmcfred
'72 Pre-L # 3041

Fred, Note that 3.5 L is what a totally disassembled, then reassembled ZF dash-2 takes. It is impossible to fully drain an assembled ZF. I once drained one for welding, then took the bottom cover off and let it drip into a pail for a day, then tipped it up on end for a weekend. When I separated the cases, there was enough lube left inside to wash an average garage floor!

Position horizontally and fill at least three times over 24 hrs to the bottom of the side fill hole; 75W90 is the thickness of honey and flows slowly & reluctantly & ZFs have lots of internal baffles.

You didn't specify but note the smaller case Dash-1 (Mangusta), Dash-1.5 (pushbutton Pantera), and Dash-zero ZF (GT-40) only take 2.1 liters when totally empty. Proportionately less when already assembled.

Thanks.

My car is a '72 Pre-L #3046, non-pushbutton so likely a Dash 2. I'll check the data plate next time I'm at the shop.

usmcfred