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Old 03-20-2024, 10:55 AM
crystalworks's Avatar
Join Date: Jun 2014
Location: SA, TX
Posts: 6,419
crystalworks is on a distinguished road
FWIW, my 6HP26Z in the 4.8is was exhibiting bad 2-1 downshift kick (the infamous being rear ended feeling) for a long time. I learned to drive around it and thus avoided it 99% of the time.

Anyway, I used the Valvoline Maxlife ATF Full Syth multi vehicle, paired with bridge and tube seals, followed by a adaptation reset @ ~120k miles if memory serves. Trans has been perfect for 3 years and 10k miles. Having experience with most of the fluids ppl use in ZF transmissions... the Valvoline is my favorite (the thickest). I've used Pentosyn, Lubri Moly, Red Line, and of course Lifeguard 6 (the thinnest).

BTW, I have 7L (I think, maybe 6) of ZF LG6 here that I'd let go for cheap if anyone local was interested. I'll never use it.
2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)

2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)
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Old 03-20-2024, 03:44 PM
wpoll's Avatar
Join Date: Sep 2015
Location: South Island, New Zealand
Posts: 4,671
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Originally Posted by Spartan View Post
OK, seems like a doable task then.

Is the filter hard to change and those internal rubber seals on the valve body (bridge seal, jump seals and mechatronic seal)?

Any particular place that you purchased these from?

Cheers Wayne,

Sorry for the slow response - lots of life admin needed lately...

It's not a hard job to replace the seals BUT you do have to drop the entire mechatronic assembly from the transmission, so you need to have your wits about you... and you'll need a 1/4" drive torque wrench to remount the mechatronic.

There are four "jump" seals and one "bridge" seal, as well as the main mechatronic sleeve that seals the transmission connector.

There are tons of videos and guides online on how to do this, along with the ZF guides online also.

And since the ZF 6HP26 was also used in the Ford Falcon and Territory, there are lots of ZF parts suppliers in Aussie, like...

2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)
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