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JEGS TH350 Performance Transmission for Buick, Oldsmobile, or Pontiac 2WD


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TH350 Performance Transmission for Buick, Oldsmobile, or Pontiac 2WD
Truck Freight: $144.99
TH350 Performance Transmission
  • Buick, Oldsmobile, Pontiac with Short 6 in. Tailshaft
  • Case Fill
  • Dyno Tested
  • Thank you! We will notify you when this product becomes available.


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    60305 is rated 4.5 out of 5 by 2.
    Rated 5 out of 5 by from Very pleased put behind a 403 olds. Pulls hard shifting grate. Best transmission for the $
    Date published: 2016-03-04
    Rated 4 out of 5 by from Jegs TH350 BOP Transmission arrived with no speedometer housing and the box soaked with trans fluid, otherwise it looked ok. Have it installed now and it is working as expected.
    Date published: 2021-09-14
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    What is the max torque this transmission can handle?

    Asked by: bmolsy22
    This transmission will hold up to 450 ft lbs of torque.
    Answered by: Rusty B
    Date published: 2018-06-12

    Can I use on a 455 bored .030 over 1972 Pontiac engine ?

    Asked by: Pontiac torque
    Yes, this will fit your application as long as the HP is within the range of the TH350.
    Answered by: Rusty B
    Date published: 2018-06-07

    Will this fit a 454 tbi chevy engine because the truck I have is a 1994 chevy 1500 4x4 with a 7.4 454 not the original 5.7 350

    Asked by: Israel c
    No, this is a trans for a Buick, Olds, or Pontiac application. You need to look at this transmission - http://www.jegs.com/i/JEGS-Performance-Products/555/60310/10002/-1
    Answered by: Rusty B
    Date published: 2018-04-10

    Do you all refund a portion of the cost like the parts places do when I turn my old transmission in. I don’t need it.

    Asked by: JonnyQuess
    We do not take transmission cores. You might try contacting a local transmission shop and see if they will purchase your core from you.
    Answered by: Matt_B
    Date published: 2018-03-31

    why cant a person hook up the kick down cable to this transmission? Why would it void warranty?

    Asked by: belushi
    The valve body has been modified and is not designed to work with a kickdown cable.
    Answered by: Jon Jegs Tech
    Date published: 2018-03-18

    What size bolt does the transmission mount use on this?. The 2 holes on the bottom where the mount mounts.

    Asked by: 68camarors
    The trans mount bolt is 7/16"-14.
    Answered by: Dean R
    Date published: 2018-01-18

    what is minimum amount of vacuum needed for transmission to run right I have 8 inches in park and 6 inches in drive

    Asked by: Bigg Redge
    8'' of vacuum @ 2000 rpm
    Answered by: SteveM
    Date published: 2017-12-06

    Will this fit a 1965 GTO 326 that has a turbo 300

    Asked by: TomDon
    This will fit, but you may need to change the torque converter and the driveshaft.
    Answered by: Rusty B
    Date published: 2017-11-13
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    What Are The Top JEGS Performance Transmissions?

    The most popular JEGS brand performance transmissions include the JEGS 700-R4 2WD SBC transmission, JEGS 4L60E performance transmission, and the JEGS TH350 performance transmission. Each of these transmissions are designed for small block Chevy or GM LS-series engines. They can be made to fit other engines using a transmission adapter plate, depending on the application.

    How Much Do JEGS Performance Transmissions Cost?

    JEGS transmissions range in price from a little over $1100 for a GM TH-350 with Buick/Oldsmobile/Pontiac Bellhousing to over $3000 For a GM 4L70E overdrive transmission used in 4WD trucks. The price will vary depending on the application and transmission type.

    What Are The Main Benefits of JEGS Performance Transmissions?

    JEGS brand transmissions are remanufactured from OE specifications with new bands, clutch plates, steel plates, seals, gaskets, and other internal parts. In addition, a performance shift kit is installed to provide firmer and quicker shifting. This adds life to the transmission as well as improves vehicle acceleration.

    How To Install JEGS Performance Transmissions

    The installation steps to install an automatic transmission will change depending on the year, make, and model of the vehicle as well as the engine. The following is a general process for transmission replacement:

    • Remove the original transmission.
    • Safely raise the vehicle high enough to allow room for transmission removal.
    • Drain the transmission fluid from the pan and remove the driveshaft from the transmission and rear axle housing assembly.
    • Disconnect any wiring, fluid cooler line, vacuum line, detent / kick down cable, and shift cable connections.
    • Unbolt the torque converter from the flexplate, transmission mount from the crossmember, and the crossmember from the vehicle frame.
    • Support the bottom of the transmission with a transmission jack or floor jack with a proper size and strength wood block properly placed to avoid damage to the fluid pan or other parts.
    • Remove the transmission bellhousing to engine bolts.
    • Raise the transmission high enough at the rear to allow removal of crossmember.
    • Slowly lower the transmission, making sure there aren't any components that still need disconnected and then remove from the vehicle.
    • Installation is in the reverse order of removal as well as properly filling the transmission fluid and detent/kick down cable adjustment per the instructions.
    Some parts are not legal for use in California or other states with similar laws / regulations

    Motor Vehicles

    WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.


    WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.

    Electrical Cords

    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.