Clutch Slave Cylinder C8979466251 8979466251 For ISUZU D-MAX 2.5 4x4 MT (TFS86) — Standard Bore, 1.101kg, OEM-Spec Aftermarket, 3-Month Warranty

C8979466251 8979466251 Clutch Slave Cylinder for ISUZU D-MAX 2.5 4x4 MT (TFS86, 4JK1) — Standard Bore, 1.101kg, OEM-Spec Replacement, Cross-Ref 8979466250

✅ Product Description

The Clutch Slave Cylinder with OEM references C8979466251 / 8979466251 is a verified direct-fit hydraulic component for the ISUZU D-MAX 2.5 4x4 MT (manual transmission) pickup, specifically the TFS86 chassis equipped with the 4JK1 (2.5L) diesel engine. This cylinder is the hydraulic actuator at the gearbox end of the clutch system — it receives hydraulic pressure from the clutch master cylinder and converts it into mechanical force that moves the release fork, disengaging the clutch for gear changes.

The part is confirmed across multiple international supplier catalogs as the standard replacement for the D-MAX 2.5 4x4 MT application, with a reference net weight of 1.101 kg and packaging dimensions of 16.5 × 12.3 × 6.8 cm. It is supplied as an OEM-specification aftermarket component under the CHINA AFTERMARKET brand designation, with a reference warranty of 3 months. The Turkish catalog description “DEBRIYAJ ALT MERKEZ 5 VITES” translates to “clutch lower center (slave cylinder) for 5-speed,” confirming its application to the 5-speed manual transmission used in the D-MAX 2.5 4x4.

• ✅ Vehicle & Drivetrain Coverage Verified: ISUZU D-MAX 2.5 4X4 MT — confirmed across Persian, Dutch, German, Russian, and Vietnamese supplier portals. KS International confirms D-MAX TFS86TT 2.5 Twin Turbo Diesel 4JK1 (04/2012>On) application for OEM 8979466251.

• ✅ Transmission Type Verified: 5-speed manual (5 VITES) — confirmed by Turkish Guneybaglilar catalog (“DEBRIYAJ ALT MERKEZ 5 VITES”).

• ✅ Weight & Packaging Verified: 1.101 kg net weight (PartSouq); packaging size 16.5 × 12.3 × 6.8 cm — confirmed by Yimi/Ecer factory data across Dutch, German, and Russian portals.

• ✅ Warranty Verified: 3 months — confirmed by Persian-market supplier listing.

• ✅ OEM Description Verified: “Cylinder; Slave,Clu” — confirmed by PartSouq ISUZU parts catalog. “CYLINDER ASM;SLA” (Cylinder Assembly; Slave) — confirmed by Indian customs import data (HS Code 87089300) for ISUZU brand production parts originating from Thailand.

• ✅ Cross-Reference Density Verified: C8979466251, 8979466251, 8979466250, 8979466242, 8979451770, 5876100800 are consistently grouped across PartSouq, Guneybaglilar, KS International, and Yimi/Ecer catalogs.

• ✅ Alternative Brand Reference: Herth+Buss JAKOPARTS J2609001 is listed on eBay.de with OE reference 8-97946-626-1 for ISUZU D-MAX clutch slave applications — providing a European aftermarket sourcing lead.

• ⚠️ Bore Diameter NOT Publicly Disclosed: Public supplier listings for C8979466251 do not publish a piston bore diameter. The Persian listing notes “Size: استاندارد” (standard size) only. Confirm the bore against the original unit if precision matching is required — do not assume a specific bore from adjacent reference numbers without verification.

✅ [Failure Symptoms — When to Replace]

• Clutch pedal sinks to the floor or feels spongy: Internal seal failure allows hydraulic pressure to bypass, preventing full clutch disengagement.

• Difficulty selecting gears / gear clash: Insufficient hydraulic pressure means the clutch does not fully disengage, causing hard shifting and gear grinding.

• Fluid leak at the gearbox bellhousing: A failed slave cylinder seal allows clutch fluid to escape, often visible as wetness or drips at the gearbox-engine joint.

• Clutch pedal does not return fully or has a low engagement point: A worn internal seal or pushrod prevents the pedal from returning to its rest position.

• Fluid level dropping in the clutch reservoir without an external leak: Internal seal bypass can allow fluid to enter the pushrod boot area or the bellhousing.

• Clutch drag / vehicle creeps when in gear with pedal depressed: If the cylinder cannot fully release the pressure plate, the clutch drags, causing hard shifting and accelerated clutch wear.

⚠️ Consequence of Ignoring Symptoms: A failing clutch slave cylinder can progress from difficult gear selection to complete loss of clutch disengagement, leaving the vehicle unable to select gears and potentially stranded. On a working D-MAX 4x4 carrying commercial or off-road loads, replacement at the first sign of a spongy pedal or fluid leak is essential to avoid gearbox damage from forced shifts.

• ✅ Vehicle & Drivetrain Compatibility

  Primary Confirmed Applications:

  
  

  
  

  Brand	Model / Series	Chassis / Variant	Engine	Transmission	Drive
  ISUZU	D-MAX (2012+)	TFS86TT	4JK1 (2.5L Twin Turbo)	5-speed MT	4x4
  ISUZU	D-MAX 2.5	—	4JK1	MT	4x4

  Broader Platform Reference (Confirm against VIN):

  
  

  
  

  Brand	Model / Series	Notes
  ISUZU	D-MAX (TFR/TFS)	PartSouq lists compatibility across TFR/TFS-RHD, LHD, Thailand, India, Malaysia, Middle East, and UCR/UCS (Indonesia) variants — confirm the specific chassis and transmission code
  ISUZU	D-MAX (Jiangxi)	PartSouq lists Jiangxi production variant compatibility

  ⚠️ Important Fitment Notes:

  • MT only: This cylinder is for manual transmission vehicles. Automatic D-MAX models do not use a clutch slave cylinder and are not compatible.

  • 4x4 confirmed: Supplier catalogs explicitly bind C8979466251 to D-MAX 2.5 4X4. The 4x2 variant may use a different clutch hydraulic configuration. Confirm the vehicle’s drive type and VIN before ordering.

  • 5-speed transmission: The Turkish catalog specifies “5 VITES” (5-speed). If the vehicle is equipped with a 6-speed manual (where applicable), verify the clutch release configuration — the cylinder may differ.

  • Cross-reference caution with 8979466250: This number is grouped with C8979466251 in Yimi/Ecer factory data and represents the same functional family. However, do not assume identical bore or pushrod length without physical comparison.

  • Broader D-MAX coverage: PartSouq lists compatibility across multiple regional variants (RHD, LHD, Thailand, India, Malaysia, Indonesia). While this suggests broad platform fitment, regional production changes may affect hydraulic line routing or mounting. Provide the VIN for final confirmation.

  ✅ Features & Benefits

  
  

  
  

  Feature	Benefit + Verification Signal
  Confirmed D-MAX 2.5 4x4 MT / TFS86 fitment	Direct replacement for the manual-transmission 4x4 D-MAX clutch slave cylinder — verified by KS International (TFS86TT 4JK1) and multiple regional supplier catalogs.
  Documented weight (1.101 kg) and packaging	Supports accurate freight calculation and warehouse space planning — confirmed by PartSouq and Yimi/Ecer factory data.
  5-speed MT specific	Matches the hydraulic requirements of the 5-speed manual gearbox used in the D-MAX 2.5 4x4 — confirmed by Turkish “5 VITES” catalog designation.
  Dense cross-reference coverage	8979466250, 8979466242, 8979451770 provide alternative sourcing leads when the primary C8979466251 reference is constrained.
  ISUZU Thailand production parts reference	Indian customs data confirms ISUZU brand production parts (CYLINDER ASM;SLA) originating from Thailand, providing a traceability anchor for genuine-quality expectations.
  Sample-friendly pricing reference	Bossgoo lists an indicative unit price of $7.42 for the C8979466251 cylinder — useful as a wholesale price anchor (confirm current quotation).

  ✅ Quality Control & Verification

  
  

  
  

  QC Item	Verification Method
  Bore diameter	Measure against original unit — spec not publicly published
  Piston / seal integrity	Bench pressure-hold / leak-down test
  Pushrod length and engagement	Dimensional gauge against original unit
  Housing material integrity	Visual inspection for cracks, porosity, or corrosion
  Connection thread	Thread gauge verification against original hydraulic line fitting
  Drive type confirmation	Verify 4x4 application against VIN
  Transmission type confirmation	Verify 5-speed manual — confirm it is not an automatic or 6-speed variant
  Reference marking	Verify C8979466251 / 8979466251 or CYLINDER; SLAVE legibility where present

  Because this cylinder has an undisclosed bore specification and is transmission/drivetrain-specific, confirming the physical form, bore, and thread on the first sample is mandatory before bulk commitment.

  ✅ Installation & Maintenance Recommendations

  ⚠️ IMPORTANT: Clutch hydraulic system service requires proper bleeding and clean fluid handling. Always refer to the ISUZU D-MAX workshop manual for the specific model. Improper bleeding can leave air in the circuit, preventing clutch disengagement. Clutch/brake fluid is corrosive — avoid contact with painted surfaces.

  Installation Guidelines (Reference Only):

  1. Confirm the required part first: Verify that the original cylinder’s bore diameter, pushrod length, and connection thread match the replacement. Confirm the vehicle is a 2.5 4x4 MT (5-speed).

  2. Safety first: Park on level ground, engage the parking brake, and chock the wheels. Do not open the hydraulic circuit while under pressure.

  3. Disconnect the hydraulic line: Place a drain pan underneath, disconnect the fluid line from the slave cylinder, and plug the line immediately to prevent contamination.

  4. Remove the mounting bolts: Unbolt the slave cylinder from the transmission bellhousing. Note the orientation of the pushrod and any return spring.

  5. Compare new and original: Verify that the replacement has the same bore, pushrod length, and mounting flange orientation as the original unit.

  6. Bench-bleed the slave cylinder (recommended): Fill the cylinder with clean clutch fluid and bleed it on the bench before installation to reduce in-vehicle bleeding time.

  7. Install the new cylinder: Position the C8979466251 cylinder on the transmission, insert the mounting bolts, and torque to the workshop manual specification.

  8. Reconnect the hydraulic line: Connect the fluid line and tighten without over-torquing.

  9. Bleed the clutch system: Fill the clutch master cylinder reservoir with the specified fluid and bleed until clear, bubble-free fluid flows from the bleeder screw. Air in the circuit is the leading cause of post-replacement clutch drag.

  10. Test operation: With the engine running, depress the clutch pedal and verify smooth gear engagement in all gears. The pedal should return fully and the vehicle should not creep when a gear is selected with the clutch depressed.

  Maintenance Schedule:

  • Inspect clutch fluid level at every engine oil change — a dropping level indicates a leak that requires immediate attention.

  • Flush clutch fluid every 2 years or according to ISUZU schedule — degraded fluid accelerates seal wear in both the master and slave cylinders.

  • Check for leaks at the slave cylinder body, bleeder screw, and hydraulic line fitting during routine inspection.

  • Replace the slave cylinder at the first sign of a spongy pedal or external leak — do not “top up and monitor” a known-failing hydraulic component on a 4x4 vehicle used for work or off-road duty.

  ✅ Packaging & Supply

  • Standard packing: Neutral carton or customer-requested packaging. Packaging size reference: 16.5 × 12.3 × 6.8 cm.

  • Package contents: 1 × Clutch Slave Cylinder . Pushrod, bleeder screw, mounting hardware, and clutch fluid are not included unless explicitly stated — confirm exact package contents at inquiry.

  • Set options: Cylinder only (standard) / cylinder + pushrod kit (subject to availability) — specify at inquiry.

  • Suitable for: ISUZU D-MAX 2.5 4x4 MT clutch and gearbox repair shops, 4x4 specialists, light commercial and off-road fleet maintenance departments, spare parts distributors, and export wholesalers serving Southeast Asia, the Middle East, Africa, and Latin America.

  • Related parts available: Clutch master cylinder, clutch disc, pressure plate, release bearing, clutch fluid, and complete D-MAX 2.5 4x4 MT clutch hydraulic service kits.