Thread: Automatic transmissions and fluids

Originally Posted by lez

Can anyone tell me what to put in a ZF4HP18Q ?

I have had all answers, dexron III, dexron II, ford mercon V ....

My dealer says nothing, its filled at the factory and is filled for life.... yeah like that was before i drained it, I want fresh !, it cant be good at its job after 90,000 miles......

So, if anyone knows the answer, or some pointers etc.

First, What is a ZF4HP18Q ? (guessing from context it is a automatic tranny)

second, Dexron II was replaced by dexron III and Mercron V well, they are all examples of Automatic transmission fluid. Pick one...

its not as easy as just picking one, they are as different as blood groups, but are all blood....

i know of owners using dex3 in these to have them fail badly

Originally Posted by lez

its not as easy as just picking one, they are as different as blood groups, but are all blood....

i know of owners using dex3 in these to have them fail badly

OK, but if the cause of the failure dex3 or something else? (hard to know)

Well, use the mercon if you do not like the feel of dex. Or get a real professional gearhead to say what to use....

thats hy i posted on here, incase someone was driving on the same tranny

if you still have the original dipstick it'll say on it what to use, if you tell me the year make and model i can prob look it up with the shop software.

Originally Posted by SaabingSteve

Here is a link to the proper fluid:

http://www.eeuroparts.com/Main/PartD...px?id=93160393

Do your self a big favor and make sure you use all the recommended fluids in your Saab.... trust me I learned the hard way.
Hope this is helpful, Steve

yes wrong fluid type is a killer, diii wont replace dii, this is not the computer world, its not an upgrade!

ok thats a US supplier, so for others on the other side of the pond it wants dexII certified to zf11b, granville and comma(AQM) have it covered

Saab dont make the gearbox, neither do they make the oil..........
(neither do porsche, pegeuot, bmw or mercedes, zf make the box, and they badge the dexII(zf11a or zf11b) in a fancy bottle to suit)