Heavy Duty Truck Parts

New Parts Added! Sign Up for Updates

SKU: TRN03643

Manual Transmission Main Shaft 4th Gear 28,18 Tooth |, S-39612, S39612

Regular price $141.97
Shipping calculated at checkout.


If you need to order multiple parts, give us a call so our sales team can work to combine your order into fewer packages and save you money on shipping! 858-898-1558

Delivery and Shipping

This part typically ships within 1 to 2 business days.

This Manual Transmission Main Shaft Gear is precision manufactured to OEM synchronizer, gear, and bearing specifications for smooth, notch-free gear engagement in commercial trucks.

Specifications

Gear Position 4th Gear
Inner Tooth Quantity 18
Outer Tooth Quantity 28
Warranty Period 1 Year or 100,000 Miles

Interchange / Cross-Reference Numbers

Brand Part Number
Tremec
Genuine Newstar S-39612
Genuine Newstar S39612

Payment & Security

Payment methods

  • Amazon
  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.