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Home/Valve Bodies & Mechatronics/8HP-55
Valve body on a computerised pressure test bench
8HP-55 — TRANSMESUN 2026 catalog item

TRANSMESUN 2026 catalog scan · Catalog page 07

Valve Bodies & Mechatronics

8HP-55 valve body

8-speed automatic · fitment verified in writing before dispatch · 12-month guarantee · MOQ from 1 piece

CE-certified factoryIntertek assessedDyno / bench testedExport crating

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Product Overview

What this part is — and why it fails.

The 8HP-55 is the ZF 8-speed automatic fitted to BMW 5/7-Series X3/X5, Audi A6/A7/Q7, Chrysler 300, Jaguar. This page covers the valve body for that platform, supplied by Guangzhou Meishun (TRANSMESUN) — a CE-certified remanufacturing factory in Huadu, Guangzhou, with 20 years in the transmission trade.

The late-model RWD workhorse: mechatronic sleeve and converter wear are the documented areas; 8HP45/50/55/70/75 variants share the architecture. That failure chain is exactly what our process is built around: the part is inspected against the platform's documented wear points. Every valve body passes a pressure-test bench cycle with recorded line pressures before packing. Every order is verified against your transmission code before anything ships.

Specifications

Specification sheet — 8HP-55.

Platform data is standard published information for this transmission family. Order-specific confirmation (condition options, kit contents, configuration) is provided in writing with our reply.

Product8HP-55 — Valve Body
Transmission platform8HP-55
Platform maker / typeZF · 8-speed automatic
Speeds / drive8-speed · RWD / AWD
Production era2009–
Typical applicationsBMW 5/7-Series X3/X5 · Audi A6/A7/Q7 · Chrysler 300 · Jaguar
ConditionNew or remanufactured, confirmed per order
TestingEvery valve body passes a pressure-test bench cycle with recorded line pressures before packing.
Quality guarantee12 months
Fitment verificationConfirmed in writing against your code / nameplate photo before dispatch
PackingTRANSMESUN branded export carton
Catalog referenceTRANSMESUN 2026 printed catalog · Catalog page 07
Verified Supply Data

Ordering terms, verified — not promised.

Verified in the 2026 Intertek on-site assessment (report 481351002_P+T) and standing site policy. Documents available with your inquiry.

MOQFrom 1 piece — trial orders welcome
Fastest lead timeFrom 1 day for in-stock codes; confirmed per order
Quality guarantee12 months across all product categories
VerificationIntertek on-site Production & Trading assessment, report 481351002_P+T (valid to 2027-01-15)
Process10-stage standardized remanufacturing with lot-level traceability
Export packingExport-grade wooden crating; shipment photos provided
Use Cases

Who orders this part, and why.

Shift-quality repairs

Harsh shifts, flares and TCC shudder trace to the valve body on most high-mileage platforms — replace rather than chase.

Rebuild shops

A bench-tested valve body removes the riskiest unknown from any rebuild order.

Distributors

Valve bodies are the highest-turn parts on failure-leader platforms — stock by code, not by car.

Applications & Fitment

Which vehicles this platform serves.

Typical applications for this platform. Always confirm against the transmission code — one car line can carry two different units by year and market.

BMW 5/7-Series X3/X5Audi A6/A7/Q7Chrysler 300Jaguar

Send Your Code for Written Fitment Confirmation →

Buyer FAQ

Questions buyers actually ask.

How do I know the valve body is my problem?

Harsh shifts, flare-ups between gears, TCC shudder and pressure-related codes (P0776, P0868 family) are the usual indicators. Send us the codes and symptom description — our engineers will confirm the likely source before you order.

Do you test valve bodies before shipping?

Yes. Each unit runs a pressure-test cycle on a dedicated bench with recorded line pressures.

New or remanufactured?

Both are available. Remanufactured units carry updated known-failure revisions; new units suit platforms where revised cores are not yet available.

How do I verify this part matches my ZF unit before ordering?

Send the transmission code from the nameplate (or a photo of it). Our engineers confirm the generation and variant in writing before anything is packed — this removes the generation-mismatch risk that plagues this platform.

What are the ordering terms?

MOQ starts at one piece, lead time from 1 day for in-stock codes, 12-month quality guarantee across all product categories, export-grade packing with shipment photos.

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Next Step

Send the code — get written confirmation.

Transmission code, part number or nameplate photo. Our engineers reply within 4 business hours with fitment confirmation, stock status and lead time — in writing, before you commit.

Send Inquiry → Browse Model Coverage