The 1964 Checker Marathon has 17 automatic transmission parts with verified fitment on this page — 7 part types and 10 brands, covering all 6 engine options (3.7L 226cid L6, 3.8L 230cid L6, 4.4L 266cid L6, 4.6L 283cid V8 and more). Each part includes a manufacturer part number and application notes.
On the 1964 Checker Marathon, the automatic transmission covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts. Most of the listed parts are Extension Housing Seal (4 parts), Fluid Pump Seal (4 parts) and Fluid Pan Gasket (3 parts). The other 4 part types cover the remaining 6 parts.
The 1964 Checker Marathon was sold with 6 engines. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 1964 Checker Marathon automatic transmission parts are WJB / INMOTION PARTS (4 parts), NATIONAL (3 parts) and TIMKEN (2 parts), plus 7 more brands.
Each part number listed for the 1964 Checker Marathon opens a page with every vehicle that part fits.
Dipstick / Fluid Filler Tube Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP Fits: 4.4L 266cid L6 | JO16 | 🇺🇸 US | Trans. code T12Intake Filler Tube To Case | View on Amazon |
| PIONEER Fits: 4.4L 266cid L6 | 762008 | 🇺🇸 US | Trans. code T12Intake Filler Tube To Case | View on Amazon |
This table covers the seals at the Dipstick / Fluid Filler Tube. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
2 Dipstick / Fluid Filler Tube Seal parts are listed for the 1964 Checker Marathon, from ATP and PIONEER.
Listed part numbers: ATP JO16 and PIONEER 762008.
Extension Housing Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TIMKEN Fits: 4.4L 266cid L6 | KWK99156 | 🇺🇸 US | Kwik-Sleeve | View on Amazon |
This table covers the wear sleeves used to restore a Extension Housing seal surface.
One part is listed for the 1964 Checker Marathon — TIMKEN KWK99156.
Extension Housing Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA Fits: 4.4L 266cid L6 | NS473234 | 🇺🇸 US | Trans. code T12 | View on Amazon |
| NATIONAL Fits: 4.4L 266cid L6 | 473234 | 🇺🇸 US | 3 speed trans.Trans. code T12 | View on Amazon |
| TIMKEN Fits: 4.4L 266cid L6 | 8160S | 🇺🇸 US | View on Amazon | |
| WJB / INMOTION PARTS Fits: 4.4L 266cid L6 | WS473234 | 🇺🇸 US | 3 speed trans.Borg Warner trans. | View on Amazon |
This table covers the seals at the Extension Housing. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
4 Extension Housing Seal parts are listed for the 1964 Checker Marathon, from BCA, NATIONAL, TIMKEN and 1 other brand.
Listed part numbers: BCA NS473234, NATIONAL 473234 and TIMKEN 8160S, plus the other parts above.
Fluid Pan Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO Fits: 4.4L 266cid L6 | TOS18106 | 🇺🇸 US | 3 speed trans.Trans. code T12 | View on Amazon |
| MAHLE / CLEVITE Fits: 4.4L 266cid L6 | W38987 | 🇺🇸 US | Cork-RubberAutomatic Transmission Oil Pan Gasket | View on Amazon |
| VICTOR REINZ Fits: 4.4L 266cid L6 | 711496800 | 🇺🇸 US | Trans. code T1214 Bolt | View on Amazon |
This table covers the gaskets that seal the Fluid Pan. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
3 Fluid Pan Gasket parts for the 1964 Checker Marathon come from 3 brands — FEL-PRO, MAHLE / CLEVITE and VICTOR REINZ.
This group includes FEL-PRO TOS18106, MAHLE / CLEVITE W38987 and VICTOR REINZ 711496800.
Fluid Pump Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS Fits: 4.4L 266cid L6 | WS99193 | 🇺🇸 US | Front3 speed trans. | View on Amazon |
This table covers the precision wear sleeves used to restore a transmission pump seal surface.
One part is listed for the 1964 Checker Marathon — WJB / INMOTION PARTS WS99193.
Fluid Pump Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA Fits: 4.4L 266cid L6 | NS6988H | 🇺🇸 US | FrontTrans. code T12 | View on Amazon |
| NATIONAL Fits: 4.4L 266cid L6 | 6988H | 🇺🇸 US | Front3 speed trans. | View on Amazon |
| SKF Fits: 4.4L 266cid L6 | 19240 | 🇺🇸 US | Front | View on Amazon |
| WJB / INMOTION PARTS Fits: 4.4L 266cid L6 | WS6988H | 🇺🇸 US | Front3 speed trans. | View on Amazon |
This table covers the seals at the Fluid Pump. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
4 Fluid Pump Seal parts are listed for the 1964 Checker Marathon, from BCA, NATIONAL, SKF and 1 other brand.
This group includes BCA NS6988H, NATIONAL 6988H and SKF 19240 and the remaining parts above.
Manual Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NATIONAL Fits: 4.4L 266cid L6 | 7929S | 🇺🇸 US | 3 speed trans.Trans. code T12 | View on Amazon |
| WJB / INMOTION PARTS Fits: 4.4L 266cid L6 | WS7929S | 🇺🇸 US | 3 speed trans.Borg Warner trans. | View on Amazon |
This table covers the seals at the Manual Shaft. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
2 Manual Shaft Seal parts are listed for the 1964 Checker Marathon, from NATIONAL and WJB / INMOTION PARTS.
This group includes NATIONAL 7929S and WJB / INMOTION PARTS WS7929S.
Buying Automatic Transmission Parts for a 1964 Checker Marathon
On this vehicle, the automatic transmission covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts.
- Match the engine first. Every automatic transmission part here is engine-specific; each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the filter and pan gasket with every fluid service, and flush the cooler lines when replacing a failed unit.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Extension Housing Seal and Fluid Pump Seal .
Frequently Asked Questions
How many automatic transmission parts fit the 1964 Checker Marathon?
Our catalog currently lists 17 automatic transmission parts for the 1964 Checker Marathon across 7 subcategories and 10 brands, covering all 6 engine options (3.7L 226cid L6, 3.8L 230cid L6, 4.4L 266cid L6, 4.6L 283cid V8 and more). Each part is matched to the engine(s) it fits.
Do automatic transmission parts differ between 1964 Checker Marathon engines?
Yes. Every automatic transmission part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of automatic transmission problems on a 1964 Checker Marathon?
Common symptoms include delayed or harsh engagement, slipping under load, fluid that smells burnt, or shuddering at light throttle around 40 mph. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the filter and pan gasket with every fluid service, and flush the cooler lines when replacing a failed unit.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 1964 Checker Marathon was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 1964 Checker Marathon?
First match the engine — each row shows which engine(s) the part fits. Then use exactly the fluid specification in the notes — automatic transmissions are the least forgiving component on the vehicle about fluid choice. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1964 Checker Marathon
Automatic Transmission Parts for Other Checker Marathon Years
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