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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N55 Turbo Engine / Drivetrain / Exhaust Modifications > Max torque for ZF8HP45 automatic transmission xdrive
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      03-01-2021, 04:32 AM   #1
Khambinho
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Max torque for ZF8HP45 automatic transmission xdrive

Just wanted to know what the max wtq is for the ZF8HP45 automatic transmission. Want to use bootmode but dont wanna blow up my transmission

2014 335i Xdrive
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      03-01-2021, 06:19 AM   #2
PAFD355
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I’ve been running BM3 along with XHP Stage 3 for over 70,000 miles without any issues. As long as you perform periodic maintenance these cars do extremely well with the added power.
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      03-01-2021, 09:48 AM   #3
bqik
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Quote:
Originally Posted by Khambinho View Post
Just wanted to know what the max wtq is for the ZF8HP45 automatic transmission. Want to use bootmode but dont wanna blow up my transmission

2014 335i Xdrive
450Nm - 330 ft-lb to the engine
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      03-01-2021, 11:35 AM   #4
thejeremyman9
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Quote:
Originally Posted by bqik View Post
450Nm - 330 ft-lb to the engine
While this is technically true based on the "45" in the transmission name, we all know the trans is reliably pushed higher than that. For long term use all the OTS maps are totally fine so long as you do not have any mechanical issues and do regular maintenance. XHP is also highly recommended.
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      03-01-2021, 01:13 PM   #5
TSA8151
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I think the front axel is the weak point. But were talking poor suspension mods/bigger turbo power levels.
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