TrakMotive NI-8639 CV Axle Shaft - Front Left
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TrakMotive
 CV Axle Shaft

TrakMotive NI-8639 CV Axle Shaft - Front Left

Brand TrakMotive NI-8639
Position Front Left
Abs Tone Ring Included No
Axle Nut Head Type Hex
Axle Nut Height (mm) 23.6
Axle Nut Hex Size (in) 1.25
Axle Nut Hex Size (mm) 31.8
Axle Nut Included Yes
Axle Nut Length (mm) 36.72
Axle Nut Locking Type Cotter pin
Axle Nut Thread Size M24*1.5
Boot Material Neoprene
Inboard Joint Type Flange
Inboard Shaft Connection Style Flange
New Or Remanufactured New
Number Of Outboard Splines 27
Outboard Joint Type Conventional
Outboard Shaft Connection Style Conventional
Overall Compressed Length (in) 24.96
Overall Compressed Length (mm) 634
Product line CV Axle Shaft
Fits INFINITI · 20 vehicles

New unit. Freshly manufactured CV axle shaft for dependable driveline service.

Neoprene boot. Durable boot material helps protect the joint from wear and contamination.

Axle nut included. Comes with a hex nut and cotter pin locking type for easier installation.

Cross-references TrakMotive NI-8639 and 391014GB0A for the same application. See all 2.

$130.78Free shipping
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Order total $130.78
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TrakMotive CV Axle Shaft for Infiniti Front Left

TrakMotive NI-8639 is a new front left CV axle shaft built for specific Infiniti applications that need a direct driveline replacement. It is configured with a flange-style inboard connection, conventional outboard joint, and a neoprene boot for dependable service in daily driving conditions.

Key Features

  • Brand: TrakMotive CV Axle Shaft
  • Part number: NI-8639
  • Front left position
  • New axle shaft construction
  • Inboard joint type: flange
  • Outboard joint type: conventional
  • Boot material: neoprene
  • 27 outboard splines
  • Axle nut included with cotter pin locking type
  • ABS tone ring not included
  • Overall compressed length: 24.96 in. (634 mm)

Detailed Description

This TrakMotive CV axle shaft is engineered for Infiniti driveline applications that use a front left axle with a flange inboard connection. The NI-8639 includes the axle nut and uses a 1.25 in. hex axle nut head with M24 x 1.5 thread size, helping match the original service configuration for the listed vehicles. TrakMotive positions this axle shaft as a new replacement part for 2013-2019 Infiniti EX37, G37, Q50, Q60, and QX50 front left applications, including Q60 models with the VR30DDTT engine note.

TrakMotive’s CV Axle Shaft line focuses on direct-fit driveline replacement parts for passenger vehicles and light-duty applications. For shoppers searching for an Infiniti Q50 front left CV axle shaft, Infiniti Q60 front left axle shaft, or a replacement CV axle shaft for Infiniti QX50, NI-8639 provides a fitment-specific option backed by the brand’s manufacturing standards.

This part cross-references 391014GB0A for the same application.

What It Helps Address

  • Clicking or popping noises during turns caused by worn CV joints
  • Vibration felt through the drivetrain under acceleration
  • Grease leakage from a damaged axle boot
  • Excessive play or looseness in the front left axle assembly
  • Loss of smooth power transfer from transmission to wheel hub

Installation Notes and Tips

Verify front left fitment by year, model, and drivetrain configuration before installation. Confirm axle nut thread size, spline count, and flange-style inboard connection against the removed part. Inspect the hub, seals, and surrounding suspension components for wear before installing the new axle shaft. Because ABS tone ring is not included, confirm the vehicle’s original ABS setup matches the listed application.

Quality Assurance

TrakMotive manufactures this CV axle shaft as a new replacement part and identifies the product line as ISO 9001:1007 and TS 16949:2009 certified. NI-8639 is covered by a limited lifetime warranty.

Compatible Vehicles

  • Fits 2014-2019 Infiniti Q50, front left.
  • Fits 2017-2019 Infiniti Q60, front left.
  • Fits 2014-2017 Infiniti QX50, front left.
  • Fits 2014-2015 Infiniti Q60, front left.
  • Fits 2013 Infiniti EX37, front left, from 3/13.
  • Fits 2013 Infiniti G37, front left, from 3/13.

Related reading

This part fits 20 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelBody TypeDrive TypeLitersCylindersFuel TypePositionNotes
2019INFINITIQ50—AWD3.0LV6—Front LeftCV Axle Shaft
2019INFINITIQ60—AWD3.0LV6—Front LeftVR30DDTT; CV Axle Shaft
2018INFINITIQ50—AWD3.5LV6ELECTRIC/GASFront LeftCV Axle Shaft
2018INFINITIQ50—AWD3.0LV6—Front LeftCV Axle Shaft
2018INFINITIQ60—AWD3.0LV6—Front LeftVR30DDTT; CV Axle Shaft
2017INFINITIQ50—AWD3.5LV6ELECTRIC/GASFront LeftCV Axle Shaft
2017INFINITIQ50—AWD3.0LV6—Front LeftCV Axle Shaft
2017INFINITIQ60—AWD3.0LV6—Front LeftVR30DDTT; CV Axle Shaft
2017INFINITIQX50—————Front LeftCV Axle Shaft
2016INFINITIQ50—AWD3.5LV6ELECTRIC/GASFront LeftCV Axle Shaft
2016INFINITIQ50—AWD3.0LV6GASFront LeftCV Axle Shaft
2016INFINITIQX50—————Front LeftCV Axle Shaft
2015INFINITIQ50—AWD———Front LeftCV Axle Shaft
2015INFINITIQ60CoupeAWD———Front LeftCV Axle Shaft
2015INFINITIQX50—————Front LeftCV Axle Shaft
2014INFINITIQ50—AWD———Front LeftCV Axle Shaft
2014INFINITIQ60CoupeAWD———Front LeftCV Axle Shaft
2014INFINITIQX50—————Front LeftCV Axle Shaft
2013INFINITIEX37—————Front LeftFrom 3/13; CV Axle Shaft
2013INFINITIG37CoupeAWD———Front LeftFrom 3/13; CV Axle Shaft
Directly replaces or cross-references 2 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
TrakMotive — NI-8639391014GB0A