Home/Heavy-Duty Truck Transmission Parts/900043 3rd MAINSHAFT GEAR

900043 3rd MAINSHAFT GEAR

Commercial diesel transmission. Match the listed part and engine identifiers before ordering.
2-Year WarrantyPAI Industries
$128.62
In stock — confirm dispatch timing 5 available
Fitment details

Want us to check the fit? Share any details you have below. All fields are optional. Your request will be included with your order, and a specialist may contact you before fulfillment.

Secure Checkout Review Return Policy Warranty Details Ask About Same-Day Shipping
PAI Part #900043
JAK'S Part #JAKS-900043
Catalog refFULLER 4304057
Catalog refFULLER 4304063
Catalog refGMC TRUCK 12474728
Catalog refMACK 3088-4304057
Not sure it's the right fit? Call a specialist
(720) 445-6249
Talk to a tech or text a photo of your part tag — we'll confirm fitment before you buy
Complete The Rebuild

Suggested Additional Parts

Commonly sold with this product. These parts are sold separately.

  1. 4th MAINSHAFT GEAR
    9000474th MAINSHAFT GEAR In stock
    $133.35View ›
  2. 2nd MAINSHAFT GEAR
    9000292nd MAINSHAFT GEAR In stock
    $105.44View ›
  3. SYNCHRONIZER ASSEMBLY
    900114SYNCHRONIZER ASSEMBLY In stock
    $95.23View ›
  4. 3rd/4th SYNCHRONIZER ASSEMBLY
    9001063rd/4th SYNCHRONIZER ASSEMBLY In stock
    $144.23View ›
  5. 5th MAINSHAFT GEAR
    9000485th MAINSHAFT GEAR In stock
    $83.48View ›
900043 3rd MAINSHAFT GEAR
BrandPAI Industries

3rd MAINSHAFT GEAR

Fits:

  • FULLER 5406 SERIES
  • FULLER 6406 SERIES

OEM cross-references:

  • FULLER 4304057
  • FULLER 4304063
  • GMC TRUCK 12474728
  • MACK 3088-4304057
  • MACK 3088-4304063
  • MACK 4103-5001863893
  • RENAULT 5001863893
  • PAI 900043

Warranty: 24 months