zf 3hp 22 transmission oil change.

Post your E12 technical questions and comments here. Please, no off-topic posts.

Moderators: Mike W., Pierre

Post Reply
garyinwestoz
Posts: 118
Joined: Thu Jan 29, 2009 9:05 pm
Location: perth, australia
Contact:

zf 3hp 22 transmission oil change.

Post by garyinwestoz » Mon Jan 28, 2019 12:42 am

Hi ya

the auto transmission is this 80 528i was not engaging reverse very well - very laggy - forward gears seemed fine, so I decided to do filter and fluid replacement - hoping to avoid a transmission swap.
Haynes manual says requires 2.0 litre Dexron II

I purchased ; Penrite ATF FS full synthetic ( bmw 265, 807, GM dexron III F/G/H https://www.penriteoil.com.au/applicati ... full-syn#/

and Ryco filter kit

Jacked car up on stands , ran in R + D for 5 mins to heat transmission up and then drained fluid - approx 2.0 litres

to remove pan ( to install nee gastket and filter) have to first removed dip stick - man that was on real tight - had to use big cresent and mallet to loosen it. - note: had to jack up left side ofcar to create enough space to get under to undo. this took 45 mins!

removed pan bolts 4- M10 - about 4 mins

removed filter bolts 12 - T30 screws - about 6 mins

cleanup up pan, and bolts, about 30 mins

installed new filter, gasket and then pan - had to redo pan couple fitness to get gasket to sit properly, took maybe 30 mins to install all this.

refilled via dip stick, with strip of hard plastic folded in half length ways , 2.0 litres of new ATF fluid - took about 10 mins to fill - had to go real slow as its only a small hole

lowered car - started and went for quick drive up and down street - reverse now works much better.

attached is picture of old and new fluids.

the old fluid was quite brown and comparatively thicker compare to the new stuff - less discos if thats the term.

any thoughts?

Image
Last edited by garyinwestoz on Tue Jan 29, 2019 5:12 am, edited 1 time in total.
77 528i -4 speed manual getting rusty
76 525 - 4 speed manual LPG and holley carb
81 528i - auto - to be relicensed with a 3.5 (83 735i)
79 SA ? 528i auto
79 528i auto parts car
86 525e 5 speed manual

User avatar
528i-1981
Posts: 131
Joined: Wed Feb 07, 2018 5:50 am
Location: Boston North Shore, MA

Re: zf 3hp 22 transmission oil change.

Post by 528i-1981 » Mon Jan 28, 2019 9:02 am

Hi Gary - your images didn't make it. I think you need to host them off-site. If you don't have an account already, imgbb works great with FF's front-end.

https://imgbb.com/

Cheers, and we northern hemisphere dwellers are little envious of your summertime activities!
(oo=00=oo) Eric
1981 528i Manual

User avatar
Mike W.
Posts: 2405
Joined: Wed Aug 30, 2006 12:12 am
Location: Sonoma County

Re: zf 3hp 22 transmission oil change.

Post by Mike W. » Mon Jan 28, 2019 12:42 pm

Yep, they like fluid changes. No need for synthetic, although it shouldn't hurt. I would suggest the next engine oil change or two to change the fluid again. Remember, the system holds much more than 2 L so you really only changed a small part of it. Next time though just pull the drain plug, don't bother with a new filter.
Mike W.



1980 528i, 3.5 euro, 5 speed conversion
1981 528i, 3.6, Recaros and more. Project
1998 328is, quick and efficient, but not satisfying
2000 528iit, Vacation mobile/wife's grocery getter

garyinwestoz
Posts: 118
Joined: Thu Jan 29, 2009 9:05 pm
Location: perth, australia
Contact:

Re: zf 3hp 22 transmission oil change.

Post by garyinwestoz » Tue Jan 29, 2019 4:56 am

I was wondering about the remaining 3 litres - thats in the torque converter - how is that flushed out/replaced -
77 528i -4 speed manual getting rusty
76 525 - 4 speed manual LPG and holley carb
81 528i - auto - to be relicensed with a 3.5 (83 735i)
79 SA ? 528i auto
79 528i auto parts car
86 525e 5 speed manual

garyinwestoz
Posts: 118
Joined: Thu Jan 29, 2009 9:05 pm
Location: perth, australia
Contact:

Re: zf 3hp 22 transmission oil change.

Post by garyinwestoz » Tue Jan 29, 2019 5:16 am

528i-1981 wrote:
Mon Jan 28, 2019 9:02 am
Hi Gary - your images didn't make it. I think you need to host them off-site. If you don't have an account already, imgbb works great with FF's front-end.

https://imgbb.com/

Cheers, and we northern hemisphere dwellers are little envious of your summertime activities!
thanks for the suggestion - have joined and uploaded - hope it now works - see original post

here is the car in question

Image
77 528i -4 speed manual getting rusty
76 525 - 4 speed manual LPG and holley carb
81 528i - auto - to be relicensed with a 3.5 (83 735i)
79 SA ? 528i auto
79 528i auto parts car
86 525e 5 speed manual

User avatar
Mike W.
Posts: 2405
Joined: Wed Aug 30, 2006 12:12 am
Location: Sonoma County

Re: zf 3hp 22 transmission oil change.

Post by Mike W. » Wed Feb 06, 2019 2:02 pm

garyinwestoz wrote:
Tue Jan 29, 2019 4:56 am
I was wondering about the remaining 3 litres - thats in the torque converter - how is that flushed out/replaced -
That's the point, it can't really be flushed out except by repeated changes. First change it's about 50% new stuff. Second change it's about 75%. Third change it's up around 90%.
Mike W.



1980 528i, 3.5 euro, 5 speed conversion
1981 528i, 3.6, Recaros and more. Project
1998 328is, quick and efficient, but not satisfying
2000 528iit, Vacation mobile/wife's grocery getter

User avatar
Lock
Posts: 218
Joined: Sun Oct 04, 2015 1:51 pm
Location: Washington
Contact:

Re: zf 3hp 22 transmission oil change.

Post by Lock » Sat Feb 09, 2019 2:50 pm

If you still have issues or want to dig deeper, go a little further and remove the valve body. You already take out half the bolts when replacing the filter, and this transmission is so simple it's one item of two pieces sandwiched together with a gasket in between.
I did this when chasing a 1-2nd slip, I think I made a thread a while ago. I found that the two gaskets had tears in them that the new gasket covered up.
New gaskets also have the latest 'upgraded' layout which is supposed to improve shifting too.

Image

Image
1979 528i 5-speed conversion G260/6

garyinwestoz
Posts: 118
Joined: Thu Jan 29, 2009 9:05 pm
Location: perth, australia
Contact:

Re: zf 3hp 22 transmission oil change.

Post by garyinwestoz » Tue Apr 23, 2019 1:39 am

thanks for the tip about the valve body gaskets

any idea on where to get transmissions parts from?

I found this today - a manual on the hp22
posted on Ozzie frogs forum

77 528i -4 speed manual getting rusty
76 525 - 4 speed manual LPG and holley carb
81 528i - auto - to be relicensed with a 3.5 (83 735i)
79 SA ? 528i auto
79 528i auto parts car
86 525e 5 speed manual

User avatar
Lock
Posts: 218
Joined: Sun Oct 04, 2015 1:51 pm
Location: Washington
Contact:

Re: zf 3hp 22 transmission oil change.

Post by Lock » Sat Apr 27, 2019 12:06 pm

Yea I found and used that same manual from aussiefrogs. Their forums have some good discussions of fixing the 3hp22.
I ordered a complete 3ph22 gasket kit from eBay, just some random store. You could post at aussiefrogs and ask those guys too, their cars seem to be autos more than ours so some of their members might have spares or know sources.
1979 528i 5-speed conversion G260/6

Post Reply