View Full Version : Which tranny ?

03-29-2012, 06:35 PM

I am looking to replace my 97 Prostar and came accross a nice 2007 X7. But the seller does not know which tranny it has.... Papers only show it is a ZF...

Could you tell it from this picture ? Standard 1:1 ? Thanks !!!


03-29-2012, 08:41 PM
Look for an ID plate on the trans, maybe on the side?

What size prop is on it? 13 X 13 or similar is a 1:1, 14 X 18 or similar for gear reduction.

03-29-2012, 09:46 PM
ZF what? The trans says "atf only" that means its the 1:1 if it takes 15w 40 or atf then its the 1.5:1 gear reduction unit, again look at your tag it will give you all the info needed, and both were available for x7, also like jerseydave said look at prop numbers, if its 1:1 stock prop will be 12.5 x 12 if its 1.5:1 stock prop will be 13.7x 17 both of these were for the 5.7L engines the 6.0L had both types of transmission and the 8.1L is only a 1.5:1 and these props were slightly larger, you get the idea on the difference.

03-30-2012, 02:33 AM
We do not find a tag but the propeller is a 12x12.5, looks like it is a 1:1 then... Thanks for your help !!!