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ZF 8HP45Z SAT problem
18-07-2019, 09:26 AM,
Post: #11
RE: ZF 8HP45Z SAT problem
(18-07-2019, 08:42 AM)user_530d Wrote:  120000 km are already a lot. Your current one has mileage?

174000km. But, it was loaded with sports automatic transmission firmware wich is more agresive. I think maybe this is the reason for the excessive wear. The gearbox was properly maintained. Every 80.000 km the oil was replaced, including the oil pan with oil filter. Used only BMW OE oil.
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18-07-2019, 09:29 AM,
Post: #12
RE: ZF 8HP45Z SAT problem
If you replace transmission, remember that you need to align the immobilizer (ISN) in the used box otherwise it won't work
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[+] 1 user says Thank You to oceandiver86 for this post
18-07-2019, 10:12 AM,
Post: #13
RE: ZF 8HP45Z SAT problem
(18-07-2019, 09:29 AM)oceandiver86 Wrote:  If you replace transmission, remember that you need to align the immobilizer (ISN) in the used box otherwise it won't work

I know, i'm thinking to keep my old ecu and transfer it to the donnor gearbox. I know that the alignment cannot be done with ESYS and i don't own the equipment for that sad
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20-07-2019, 22:42 PM,
Post: #14
RE: ZF 8HP45Z SAT problem
Where are you from???
I can solve your problem...write me a PM!!!!!!!!!!!!!
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21-07-2019, 06:46 AM,
Post: #15
RE: ZF 8HP45Z SAT problem
I can also erase the ISN in the 8hp, then it just has to be installed and flashed on the vehicle.
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21-07-2019, 07:34 AM,
Post: #16
RE: ZF 8HP45Z SAT problem
I'm thinking that maybe the shifts are a bit more agressive because the 2TB(SAT) software is loaded to the gearbox. In comfort mode, the gearbox shifts preety well. But, in sport mode is verry agressive. On manual mode, every time a gear is changed, i get a 'bump". I will try to remove the 2TB option and flash DME/DSC/EGS with standard 8HP software. Just in case...can this ISN erase, be done remotely? I'm living in Romania.
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21-07-2019, 18:25 PM,
Post: #17
RE: ZF 8HP45Z SAT problem
Your transmission is showing wear that will get worse over time, the guide ZF adapted values table is for trans that have severe problem

300 up to 350 (positive) adapted values are a concern that shows the trans is beginning to wear the bushings, negative numbers means something is beginning to hang (requiring less pressure).

You can chenge the trans without much fuzz if you transfer the CU to the replacement trans, just be careful no to touch the connect pins and to leave it on rest on plastic to minimaze the static electric shock
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[+] 1 user says Thank You to crazybm for this post
22-07-2019, 07:02 AM,
Post: #18
RE: ZF 8HP45Z SAT problem
(21-07-2019, 18:25 PM)crazybm Wrote:  Your transmission is showing wear that will get worse over time, the guide ZF adapted values table is for trans that have severe problem

300 up to 350 (positive) adapted values are a concern that shows the trans is beginning to wear the bushings, negative numbers means something is beginning to hang (requiring less pressure).

You can chenge the trans without much fuzz if you transfer the CU to the replacement trans, just be careful no to touch the connect pins and to leave it on rest on plastic to minimaze the static electric shock

Thank you for your answer! Ok, so basically there is no software/adaptation related problem. It's just the transmission wear. Is there something that can be done? Or I just have to wait for the transmission to fail, and then to repair it or replace it? Are there any "magical" transmission additives that can compensate the internal wear?
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22-07-2019, 08:27 AM,
Post: #19
RE: ZF 8HP45Z SAT problem
Best option is to buy a rebuilt transmission. A used transmission could have the same problem like what you have now. Either way it wont be a cheap fix.
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22-07-2019, 15:14 PM,
Post: #20
RE: ZF 8HP45Z SAT problem
If I try to replace it with a used one with low mileage, what would be a correct price for EGS/ISN matching?
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