GM 300THM (ST300 AKA Jetaway) transmission

General Motors 300THM (ST300 AKA Jetaway) Transmission Parts for Sale

ATTENTION International Customers

I will no longer ship parts Internationally via the Postal Service. I have had WAY to many problems with VERY long delivery times. If you want parts shipped to International addresses you must fill out the International Shipping Cost Request form so I can quote FedEx or DHL rates INSTEAD of clicking on "Add to Cart".

I can get 100's of additional parts for these transmissions that I don't yet have listed. E-mail me with a list of other parts you may need for these. If I can get them, I will list them for you.

PLEASE include your ZIP Code (or shipping address if for international delivery)
so that I can quote shipping and handling charges.

Parts to be shipped from Belleville, MI AFTER received from supplier(s) (which can take a week or more)

PayPal will add each item's shipping charges,
but I will refund excess shipping charges based on how I can combine items to minimize shipping costs.
Sturdiness of parts as well as size and weight may impact how parts can be combined,
but I will try to get the costs as low as practical for you.

Currently shipments can take MUCH longer than normal due to delays within the shipping carriers networks.

Click on category below to jump to that section of this page

Overhaul/Rebuild Kits
Filters
Bushings
Miscellaneous Gaskets and Seals
Electrical Components
Vacuum Modulator
Pans
Pumps and Related Parts
Other Hard Parts
Speedo Gears and Related Parts
Manuals

Overhaul/Rebuild Kits
For International Shipping Rates click here
300THM (aka ST300 or Jetaway) Overhaul Kit (1) sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (157.00+22.05 shipping and handling)

300THM (aka ST300 or Jetaway) Master Rebuild Kit (3) sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (308.00+22.05 shipping and handling)

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Filters
For International Shipping Rates click here
300 THM Filter sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (90.00+22.05 shipping and handling)

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Bushings
For International Shipping Rates click here
300THM Front Bushing sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (45.00+15.40 shipping and handling)

300THM Case to Output Shaft Bushing sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (75.00+15.40 shipping and handling)

300THM Extension Housing Bushing sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (45.00+15.40 shipping and handling)
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Miscellaneous Gaskets and Seals
For International Shipping Rates click here
New 300THM Manual Shaft Seal sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (20.00+9.65 shipping and handling)

New 300THM Servo Cover O'ring sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (20.00+9.65 shipping and handling)

New 300THM Pan Gasket sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (45.00+9.65 shipping and handling)

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Electrical Components
For International Shipping Rates click here
Used 300THM Electrical Connector (1 Prong) sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (35.00+9.65 shipping and handling)

Used 300THM Electrical Connector (2 Prong) sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (35.00+9.65 shipping and handling)

New 300THM Electrical Connector O'ring sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (10.00+9.65 shipping and handling)

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Vacuum Modulator
For International Shipping Rates click here
300THM Vacuum Modulator sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (65.00+15.40 shipping and handling)

New "L" Shaped Modulator Elbow Hose sent to anywhere in the lower 48 USA states via US Postal Mail (10.00 + 9.65 shipping and handling)

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Pans
For International Shipping Rates click here
(Click to see Special Notice on this Part) Used 300THM Type 1 Bottom Pan sent to anywhere in the lower 48 U.S.A. states via Standard Post Mail®
Used 300THM Type 2 Bottom Pan sent to anywhere in the lower 48 U.S.A. states via Postal Mail (125.00+27.45 shipping and handling)

Used 300THM Type 3 Bottom Pan sent to anywhere in the lower 48 U.S.A. states via Postal Mail (125.00+27.45 shipping and handling) Notice: The one in the picture has been powder coated, but this one has not.

Used 300THM Bottom Pan Bolt (This is for one bolt. The pan requires 14.) sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (1.00+9.65 shipping and handling)
Please note that there are THREE different pans for these transmissions.

Type 1 Type 2 Type 3

Click on Pictures to Enlarge

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Pumps and Related Parts
For International Shipping Rates click here
(Click to see Special Notice on this Part) Used 300THM Front Pump (for use with variable pitch stator torque converter that has solenoid attached to the pump) (does NOT include solenoid) (2) sent to anywhere in the lower 48 U.S.A. states via Ground Transportation Click to get a shipping quote.
(Click to see Special Notice on this Part) Used 300THM Front Pump (for use with variable pitch stator torque converter that has solenoid attached to the valve body) (does NOT include solenoid) (2) sent to anywhere in the lower 48 U.S.A. states via Ground Transportation Click to get a shipping quote.
(Click to see Special Notice on this Part) Used 300THM Front Pump (for use with non-variable pitch stator torque converter) (2) sent to anywhere in the lower 48 U.S.A. states via Ground Transportation Click to get a shipping quote.
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Other Hard Parts
For International Shipping Rates click here
Used 300THM Lo Servo Cover (#11 in this picture) sent to anywhere in the lower 48 USA states via US Postal Mail (35.00 + 15.40 shipping and handling)

Used 300THM Manual Lever Arm for Console Shift sent to anywhere in the lower 48 USA states via US Postal Mail (76.00 + 15.40 shipping and handling)

(Click to see Special Notice on this Part) Used 300THM Front Clutch Plate Cushion Spring sent to anywhere in the lower 48 U.S.A. states via US Postal Mail

(Click to see Special Notice on this Part) Used 300THM Reverse Clutch Plate Cushion Spring sent to anywhere in the lower 48 U.S.A. states via US Postal Mail

(Click to see Special Notice on this Part) Used 300THM Manual Shaft sent to anywhere in the lower 48 U.S.A. states via US Postal Mail

(Click to see Special Notice on this Part) Used 300THM Manual Outer Lever (U Shaped) sent to anywhere in the lower 48 U.S.A. states via US Postal Mail

(Click to see Special Notice on this Part) Used 300THM Park Actuator Rod sent to anywhere in the lower 48 U.S.A. states via US Postal Mail
Used 300THM High Clutch Drum sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (260.00+22.05 shipping and handling)

Used 300THM Reverse Clutch Cushion Spring sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (75.00+22.05 shipping and handling)

New After Market Universal GM Torque Converter/Flywheel Cover sent to anywhere in the lower 48 U.S.A. states via Ground Transportation (45.00+31.70 shipping and handling)

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Speedo Gears and Related Parts
For International Shipping Rates click here
New 300THM Extension Housing to Case Square Cut Seal (A) sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (17.00+9.65 shipping and handling)
New 300THM Extension Housing to Speedo Adapter O'ring (B) sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (10.00+9.65 shipping and handling)

~~Sold Out New 300THM Speedo Gear to Speedo Adapter Improved Lip Seal (C) sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (17.00+9.65 shipping and handling)~~

New 300THM Speedo Gear to Speedo Adapter OEM Style Lip Seal (D) (requires retainer listed below) sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (8.00+9.65 shipping and handling)

Used 300THM Speedo Gear to Speedo Adapter OEM Style Lip Seal Retainer (E) sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (8.00+9.65 Shipping and handling)

Used 300THM 34 Tooth Speedo Driven Gear Looks similar to (F), but a different color sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (17.00+15.40 shipping and handling)

Used 300THM 37 Tooth Speedo Driven Gear (F) sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (17.00+15.40 shipping and handling)

Used 300THM 38 Tooth Speedo Driven Gear Looks similar to (F), but a different color sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (17.00+15.40 shipping and handling)

Used 300THM Speedo Adapter (34 Tooth to 39 Tooth only) (G & H) sent to anywhere in the lower 48 U.S.A. states via US Postal Mail (17.00+15.40 shipping and handling)

A B C D E F G H

Click on pictures to enlarge

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Manuals
For International Shipping Rates click here
300THM Transmission Repair Manual (78 pages) on USB Drive sent to anywhere in the lower 48 USA states via US Postal Mail (35.00+9.65 shipping and handling)

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(1) Overhaul Kit includes: gaskets, o'rings, lip seals, sealing rings (rotating ones only), and metal clad seals (but no clutch plates).

(2) Please E-mail me with the casting numbers on your 300THM Pump AND tell me if you transmission is air cooled or water cooled to insure you get the correct one.
(3) Master Rebuild Kit includes: gaskets, o'rings, lip seals, sealing rings (rotating ones only), metal clad seals, steel (unlined) clutch plates, and friction (lined) plates.
(Special Notice)
Due to severe disruption in the supply sources for this part, you must E-mail to me to find out about price and availability of this part. Make SURE that in your email you include 1. Name of the transmission, 2. The name of the part, 3. The year of the vehicle, 4. The model of the vehicle, 5. The engine size of the vehicle, 6. Your country, and Your Postal (ZIP) Code.
(Ground Shipping Cost Request)

Since Ground Transportation prices have skyrocketed and are continually changing, I can no longer put those charges into my listings. You must fill out the form that you can access HERE. After filling it out, save it to your desktop. You can then attach it to the E-mail you send to me to find out the cost for ground transportation on heavy and/or bulky items. If you need instructions on how to save the file to your computer, click HERE. You will need Acrobat Reader to access the form. If you don't have it, you can download it for free HERE.

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