Skip to main content
  • Shop By Category
  • Core Return
  • About Us
  • Contact Us
  • Our Blog
MENU
My Cart Login
Home
Phone: (888) 856-9960
For Ebay Inquiries: (866) 423-6872
  • Login
  • Empty
    $0.00
  • Shop By Category
  • Core Return
  • About Us
  • Contact Us
  • Our Blog
  • Differential Components
  • Differential
  • Drive Axle Shaft
  • Transfer Case
Carriers
Bearing Kits
Ring and Pinion
Differential Gear Kit
Differential Clutch Pack
Shop All Products

A-D

Auburn Gear

E-J

Ford

K-N

Mopar

S-Z

US Powertrain
Shop All Products

FAST  2-3 Day Shipping! Same Day Shipping on Orders Before 1:30pm CST || FREE Shipping on EVERYTHING in The U.S.! (exc. HI&AK)

  • Choose Vehicle

Select Vehicle

Part Type

  • Differential (5) Apply Differential filter
  • Differential Ring and Pinion (2) Apply Differential Ring and Pinion filter

Gear Ratio

  • (-) Remove 3.90 filter 3.90

Axle Type

  • Chrysler 9.25" (3) Apply Chrysler 9.25" filter
  • Ram 9.25" (2) Apply Ram 9.25" filter
  • Chrysler 8.25" (1) Apply Chrysler 8.25" filter
  • Rear Differential (1) Apply Rear Differential filter

Part Type

  • Differential (5) Apply Differential filter
  • Differential Ring and Pinion (2) Apply Differential Ring and Pinion filter

Gear Ratio

  • (-) Remove 3.90 filter 3.90

Search found 7 items

  • (-) Remove 3.90 filter 3.90
  • New OEM 05038703AJ Mopar 3.90 Ratio Anti-Spin RWD
    440-1562
    $1,595.00
    view
    Quick View
  • New Chrysler/Dodge Ring and Pinion 8.25" 3.90 Ratio
    K740409
    $310.00
    view
    Quick View
  • New Ring and Pinion Dual Drilled 1974-Current Chrysler 9.25 inch 3.90 ratio
    K740135
    $315.00
    view
    Quick View
  • Remanufactured 1994-1999 Ram 1500 9.25 inch 3.90 ratio with Posi-Traction
    435-1758BP
    $2,175.00
    view
    Quick View
  • Remanufactured 1994-1999 Ram 1500 9.25 inch 3.90 ratio without Posi-Traction
    435-1758BO
    $1,900.00
    view
    Quick View
  • Remanufactured 1994-1999 Ram 1500 9.25 inch 3.90 ratio 4x2 with Posi-Traction
    435-1755CP
    $2,175.00
    view
    Quick View
  • Remanufactured 1994-1999 Ram 1500 9.25 inch 3.90 ratio 4x2 without Posi-Traction
    435-1755CO
    $1,900.00
    view
    Quick View
Displaying 1 - 7 of 7
1000027879.jpg
1000027880.jpg
1000027964.jpg
20240206_124239.jpg
Building 1.jpg

Shop

Drive Axle Shaft Oil Slinger
Differential Ring and Pinion
Complete Transfer Case Units
Differential Gear Set
4WD Indicator Light Switch
ABS Wheel Speed Sensor Tone Ring
Everything We Sell

Company

  • About Us
  • Contact Us
  • Core Charge Policy

Sign up for updates!

Find Us

1451 Peoria Avenue
Spirit Lake, Iowa 51360-0189
Office Hours: 8:00am-5:00pm CST
Monday through Friday
Phone: (888) 856-9960
For Ebay Inquiries: (866) 423-6872
©2025 US Powertrain
Website designed by Complete Web Solutions