[jhcao1472]

I noticed a lot of people here use Redline D4 ATF here. Has anyone used Redline D6 ATF? Redline states it meets Shell M-1375.4 spec and can be used in our ZF transmission. If you've used it before, what do you think?

Searched but no result.

Here is the link to Redline D6

http://www.redlineoil.com/product.aspx?pid=115&pcid=9

[chumley]

I've used both and prefer the D4. Tried the D6 first since that's what Redline shows on their website for our car if I remember correctly. Nothing scientific about my reasoning, I just thought the D6 felt almost too "thin". Friction was almost non-existent between gear changes but I didn't like how it felt. Almost too loose. Bear in mind that I live in Florida so it's pretty much always hot here. Colder climates might appreciate the reduced friction.

[jhcao1472]

Has anyone put Mercon SP in their car?

http://forums.bimmerforums.com/forum...Ford-Mercon-SP)

[WhiteFury]

I dont like D6 and Its in my car now. Its notchy and harsh shifts. Zero slips but too rough. Seems thin.

[135Pats]

D4 for days if you drive hard and/or live in a warmer climate.

[WhiteFury]

I am in the process of grabbing this zf lifeguard 6. What is the viscosity of lifeguard 6 vs D4 vs D6?

[WhiteFury]

However it could be the Alpina flash as I have never shifted that high with the factory TCU flash.

[135Pats]

Originally Posted by WhiteFury

I am in the process of grabbing this zf lifeguard 6. What is the viscosity of lifeguard 6 vs D4 vs D6?

It's less viscous than either fluid. IMHO the Redline fluids are better than Lifeguard. It's just not meant for really hard driving.

http://www.worldpac.com/tagged/ATF_-_ZF_Lifeguard_6.pdf

http://www.redlineoil.com/product.aspx?pid=51&pcid=9

Vis @ 40°C=34 for D4

Vis @ 40°C=26.8 for Lifeguard 6

Vis @ 40°C=30.7 for D6

[WhiteFury]

Originally Posted by 135Pats

It's less viscous than either fluid. IMHO the Redline fluids are better than Lifeguard. It's just not meant for really hard driving.

http://www.worldpac.com/tagged/ATF_-_ZF_Lifeguard_6.pdf

http://www.redlineoil.com/product.aspx?pid=51&pcid=9

Vis @ 40C=34 for D4

Vis @ 40C=26.8 for Lifeguard 6

Vis @ 40C=30.7 for D6

So what your saying is that redline D6 is thicker than lifeguard 6?

I just know that the shifts from 2nd to 3rd at WOT are rougher than they used to be more notchy.

[WhiteFury]

Is this fluid as good as Lifeguard 6? I found it locally at advanceautoparts

http://shop.advanceautoparts.com/web...zoneAssigned=1

[WhiteFury]

Okay so I drove the car to high rpm's and shifted from second to third gear wow the transmission and car were still cold the shift was smooth, there is a slight delay while shifting like it goes slower when it's cold.

But the harshness is much smoother and pretty much 100% gone! does this mean that I need Thicker or more viscous fluid?