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Audi E type clutch hub assembly ZF 8HP55A 38 spline and matching gears

Audi E type clutch hub assembly ZF 8HP55A 38 spline and matching gears

Brand Name:

AUDI

Model Number:

8HP-55A;0BK

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Product Details
Year::
2010-2017
MODEL::
8HP-55A;0BK
SIZE::
15X15X15CM
Brand::
AUDI
Item Weight::
3kg
OENO:
1087471023
Applicable Brand::
2016-2018 RS6 2014-2018 RS7 2013-2017 S8
Payment & Shipping Terms
Minimum Order Quantity
1
Price
0-1000
Packaging Details
Paper box or wooden box
Delivery Time
5-8 work day
Payment Terms
T/T
Product Description

Key Specifications:

  1. Spline Design: 38 involute splines (12° pressure angle) with 0.8–1.2µm hardened surface finish for gear engagement

  2. Material: Case-hardened 20MnCr5 steel (58–62 HRC core, 850HV surface)

  3. Gear Match: Mated to planetary carrier with 0.02–0.05mm backlash tolerance

  4. Critical Functions:

    • Transmits 320Nm in 2nd/4th/6th gears

    • Oil passages for clutch cooling (flow rate: 4–6 L/min)

  5. Failure Modes:

    • Spline fretting (if backlash exceeds 0.1mm)

    • Lubrication starvation marks at >120°C

Note: Updated from 8HP45 with 15% wider spline base for 6000+ shift cycles. Requires ZF-approved friction modifier additives.


Audi E type clutch hub assembly ZF 8HP55A 38 spline and matching gears 0

Audi E type clutch hub assembly ZF 8HP55A 38 spline and matching gears 1

Audi E type clutch hub assembly ZF 8HP55A 38 spline and matching gears 2



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