Made in USA
GM TH350 Performance Automatic Transmission for Buick, Oldsmobile, or Pontiac, 2WD
InfoVehicle Info Needed
JEGSPART NUMBER: 555-60305

GM TH350 Performance Automatic Transmission for Buick, Oldsmobile, or Pontiac, 2WD

$1,54099$1694.99You Save$154.00
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ShippingShips on Oct 05, 2026
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GM TH350
Performance Automatic Transmission
  • TH350
  • Buick, Oldsmobile, Pontiac
  • Short 6 in. Tailhousing
  • Case Fill
  • Dyno Tested

    Transmission Dimensions

    Transmission Fluid Fill Capacities

    JEGS 555-60305 GM TH350 Performance Automatic Transmission Features:

    • Handles Up To 450 HP
    • Firm, Crisp Shifts
    • Designed to work without a throttle valve or kick-down cable
    • Removal of the kick-down block-off plug voids the warranty
    • Can be used with adapter 555-60170 to work with the Chevy bolt pattern
    • Speedometer drive gear and driven gear not included
    • Overall Length: 27 5/8 in.
    • Total transmission fluid capacity: 10 quarts
    • Transmission fluid service capacity: 4 quarts

    JEGS 555-60305 GM TH350 Performance Automatic Transmission IMPORTANT Notes::

    • This JEGS Performance Transmission has gone through rigorous testing to provide you with the best possible replacement transmission
    • Here are a few tips to ensure a successful installation
      • Follow the manufacturer's instructions thoroughly
      • Before installation, flush any old fluid from your system, including transmission lines, oil cooler, and torque converter to remove any contaminants that could harm your new transmission
      • When installing your torque converter, follow the instructions carefully to ensure proper fitment into the transmission input shaft and also attaching to your engine. Specific tolerances are required so that you do not damage the front pump in the transmission or the converter.
    • If you have any problem installing this transmission, before returning it please call the JEGS technical support line. Our experts may be able to assist you with the proper installation.
  • Part TypeAutomatic Transmission
    BrandJEGS
    Package Height24.0
    Package Width26.0
    Package Length40.0
    Weight151.0 PG
    Part CategoryReplacement Parts
    Shift PatternForward
    Bellhousing Bolt PatternBuick
    Transmission Mfr.GM
    Transmission Drive TypeRWD
    Pan TypeStock
    First Gear Ratio (Automatic Transmissions)2.52
    Transmission Mfr. CodeTH350
    Yoke StyleSlip On
    Dipstick IncludedNo
    Valve Body StyleAutomatic
    Trans-Brake IncludedNo
    Tailshaft Length6 in (152.4 mm)
    Input Spline Quantity30 in (762 mm)
    Trans ModelTH350
    Horsepower450
    Fluid Fill LocationCase
    Part FitmentSemi Universal
    Case MaterialAluminum
    Safety RatingNot SFI Approved
    LockupNo
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews

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    EASY KITS

    Some parts are not legal for use in California or other states with similar laws / regulations
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