Automatic Transmission Fluid Blend question

[mannyhs]

I'm wondering if automatic transmission fluid comes in a blend like engine oil. I've seen conventional and synthetic ATF but never a blend.

Is there a reason for this? Or does it exist but I've just never seen it?!

Is it alright to blend your own transmission fluid (ie: 4 parts conventional plus 4 parts synthetic) provided they both meet the specification for the car?

 

[mongo161]

IMO...Valvoline Max Life, Dex III/Merc is a synthetic blend. This is the ATF in the red 1 gallon jug.

 

[PhillyJoe]

Mobil and Castrol are blends. Maxlife and Valvoline dex6 are synthetic.

 

[Boss302fan]

Maxlife is a full Syn... I have the case and bottles in my garage.

 

[mannyhs]

Thanks everyone

Like an engine, are there things to look out for with a transmission that might indicate it isn't suitable for a switch to synthetic?

 

[Sawdusted]

If you have conventional in your tranny now, you're blending it by putting in fill syn. Unless you drain or flush the pan and torque converter together

 

[285south]

Mobil 1 is synthetic and is great. Red Line is synthetic and is better than M1.

Just changed my manual transmission fluid with Mobil 1 Synthetic Gear Lube LS 75W-90. Even thou the manual states 75w80, I thought 75w80 being so close might as well be straight weight, and went with Mobil 75w90. Went with M1 since I had those $5 off coupons at O'Reilly Give-a-away and bought them back in July, instead of paying full price for Redline.

 

[285south]

Here is the link to find out what fluid goes into the tranny: http://www.redlineoil.com/application.aspx

 

[bmwtechguy]

M1 75w-90 LS is not the lube to use in a manual trans with synchronizers. The Redline is the one to use for better shifting and longer syncro life.

 

[901Memphis]

I believe most ATF you see should be a synthetic blend based on most of the newer requirements, such as DEX 6 and ATF+4

 

[threeputtpar]

Yes, there are syn blend auto tranny fluids. Ususlly, the fluids that meet Mercon V are at least a blend, and the Multi Vehicle ones are at least blends.

GM's Dex VI is also a blend, although the aftermarket fluids that meet the spec are typically full syn.