How much fluid?

[Dave J]

How much transmission fluid does the transmission take? I'm planning on changing the transmission fluid.

[jeffa711]

2 quarts

[BLS]

2 quarts is what I used. Filled until I could touch it with my pinky stuck in the hole

Make sure you drain using both drain plugs...

[Albatross]

After all is said and done, what brand of transmission fluid and weight are you using?

[Jphoenix]

Redline MT85

[Dave J]

I just ordered Red line MTL which is 75W80...

[Steve Davis]

Dave,
IIRC, Redline MTL is a TRANSMISSION fluid - not necessarily applicable to our hypoid axle setups. You should check to make sure that you are using an EP (extreme pressure) rated fluid .. whatever it is. I found a short article that shines some light on WHY this is the case.
http://www.lubetrak.com/newsletter/jan10html.html.

[Amon]

Steve,

What do you use for engine and tranny oil?

Thanks!

Mark

[HayesCages]

We've always used Redline Lightweight shockproof gear oil with no issues. Expect leaks.

[budawe]

I always recommend transmission oil not engine oil. As stated in the article Steve tagged, gears shear oil on a molecular level and reduce it's film strength. I do not recommend Red Line shock proof oils because the spherical stuff in the oil to cushion shock builds up in the synros and needle bearings in VW boxes causing drag to increase. Ufnfortunately, Red Line discontinued the oil I used to recommend. Their MTL is ok but costly.

Any oil recommended for motorcycles that have unitized construction; have the engine and tranny share oil, will work for our needs. There are some synthetic 5/50 oils that work really well regardless of outside temps.

I do not fill trannies up to the hole. 1" below the hole is perfect. Any more and the tranny will puke it out. I recommend an oil change about every 4 events. Since we have syncros, brass is worn off during shifting and gets in the oil. Every time you hear a bark or grind there's been some steel thrown in there as well.

Building trannies for the class for over 30 years.

[Steve Davis]

Steve,

What do you use for engine and tranny oil?

Thanks!

Mark

I use Joe Gibbs 75-90 in the gearbox and Valvoline VR1 synthetic 20W50 in the engine.

[lucky13]

There was a pretty good thread about gear oil on the other board a couple of years ago that I refer back to when I use gear oil at the track, throw out the last bottle, and can't remember which RedLine product I use. It is important to remember not to follow the old recommendation of filling to the bottom of the fill hole because it will DEFINITELY puke out when it gets tossed around, and to drain both plugs. Here is a link:

http://www.formcarregistry.com/inter...php?f=3&t=4828

[DLRacing]

I care for 7 Vees. Most forgotten is the reason why there are magnets in the drain plugs of both chambers in the trans axle. Once saturated with metal, the rest stays in suspension in the lube and acts like fine grinding powder. Drain "both chambers" and clean the magnets every other race week then refill with lube of choice. I've found what kills a bang box quicker than anything is free suspended "HARD" contaminates in the lube.

Hope this helps.