Trans fluid

**johnfin** · 08-01-2012, 05:16 PM

Its getting harder to find anything marked "DEXTRON III" anymore. Can I use the Castrol Transmax transmission fluid in my manual 6-speed transmission.

**2002ssslp** · 08-01-2012, 05:54 PM

Yes, but only use Castrol Transmax High Mileage. This is a mineral " Dino " based fluid not synthetic which is exactly what you need. Because it is a high mileage fluid it has extra additives to keep seals fresh, clutches conditioned and prevents gumming. Do not use a synthetic fluid in a T-56 trans. You can use any Dex III fluid but a high mileage dino fluid is best. Castrol is a great brand but you can buy whatever brand high mileage trans fluid is on sale. I think Walmart (Shell) may have one that meets Dex III specs. 5 Qts. are needed.

**silverWS6** · 08-01-2012, 06:06 PM

Originally Posted by 2002ssslp

Yes, but only use Castrol Transmax High Mileage. This is a mineral " Dino " based fluid not synthetic which is exactly what you need. Because it is a high mileage fluid it has extra additives to keep seals fresh, clutches conditioned and prevents gumming. Do not use a synthetic fluid in a T-56 trans. You can use any Dex III fluid but a high mileage dino fluid is best. Castrol is a great brand but you can buy whatever brand high mileage trans fluid is on sale. I think Walmart (Shell) may have one that meets Dex III specs. 5 Qts. are needed.

This, I just did mine a few weeks ago and it feels great

**johnfin** · 08-02-2012, 04:33 AM

According to the Factory repair manual page 7-28 pook 3, it takes 4.1 quarts, why do you think its 5? Also is the non-high milage stuff synthetic?

**2002ssslp** · 08-02-2012, 05:22 AM

Originally Posted by johnfin

According to the Factory repair manual page 7-28 pook 3, it takes 4.1 quarts, why do you think its 5? Also is the non-high milage stuff synthetic?

The last time I looked in the auto parts store they do not sell .1 qts. of trans fluid. My trans guy put in 4.5 and he said a little extra will not hurt the unit and it protects for static loss which is weepage. Look at the bottle to see if it is synthetic or synthetic blend.