28 Automatic transmission parts are listed for the 1965 Checker Marathon, in 14 part types, covering all 4 engine options (3.8L 230cid L6, 4.6L 283cid V8, 5.2L 318cid V8 and 5.3L 327cid V8). Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 1965 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 11 part types cover the remaining 17 parts.
The 1965 Checker Marathon was sold with 4 engines. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
11 brands supply automatic transmission parts for the 1965 Checker Marathon, led by SKF (6 parts), TIMKEN (4 parts) and WJB / INMOTION PARTS (4 parts), plus 8 more brands.
Each part number listed for the 1965 Checker Marathon opens a page with every vehicle that part fits.
Dipstick / Fluid Filler Tube Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP Fits: 3.8L 230cid L6 | JO16 | 🇺🇸 US | Trans. code T12Intake Filler Tube To Case | View on Amazon |
| PIONEER Fits: 3.8L 230cid 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 for the 1965 Checker Marathon come from 2 brands — ATP and PIONEER.
Part numbers include ATP JO16 and PIONEER 762008.
Extension Housing Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TIMKEN Fits: 3.8L 230cid L6 | KWK99156 | 🇺🇸 US | Kwik-Sleeve | View on Amazon |
This table covers the wear sleeves used to restore a Extension Housing seal surface.
This group shows a single part: TIMKEN KWK99156.
Extension Housing Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA Fits: 3.8L 230cid L6 | NS473234 | 🇺🇸 US | Trans. code T12 | View on Amazon |
| NATIONAL Fits: 3.8L 230cid L6 | 473234 | 🇺🇸 US | 3 speed trans.Trans. code T12 | View on Amazon |
| TIMKEN Fits: 3.8L 230cid L6 | 8160S | 🇺🇸 US | View on Amazon | |
| WJB / INMOTION PARTS Fits: 3.8L 230cid 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 for the 1965 Checker Marathon come from 4 brands — BCA, NATIONAL, TIMKEN and 1 other brand.
This group includes BCA NS473234, NATIONAL 473234 and TIMKEN 8160S and the remaining parts above.
Fluid Pan Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO Fits: 3.8L 230cid L6 | TOS18106 | 🇺🇸 US | 3 speed trans.Trans. code T12 | View on Amazon |
| MAHLE / CLEVITE Fits: 3.8L 230cid L6 | W38987 | 🇺🇸 US | Cork-RubberAutomatic Transmission Oil Pan Gasket | View on Amazon |
| VICTOR REINZ Fits: 3.8L 230cid 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 are listed for the 1965 Checker Marathon, from FEL-PRO, MAHLE / CLEVITE and VICTOR REINZ.
Listed part numbers: FEL-PRO TOS18106, MAHLE / CLEVITE W38987 and VICTOR REINZ 711496800.
Fluid Pump Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS Fits: 3.8L 230cid L6 | WS99193 | 🇺🇸 US | Front3 speed trans. | View on Amazon |
This table covers the precision wear sleeves used to restore a transmission pump seal surface.
This group shows a single part: WJB / INMOTION PARTS WS99193.
Fluid Pump Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA Fits: 3.8L 230cid L6 | NS6988H | 🇺🇸 US | FrontTrans. code T12 | View on Amazon |
| NATIONAL Fits: 3.8L 230cid L6 | 6988H | 🇺🇸 US | Front3 speed trans. | View on Amazon |
| SKF Fits: 3.8L 230cid L6 | 19240 | 🇺🇸 US | Front | View on Amazon |
| WJB / INMOTION PARTS Fits: 3.8L 230cid 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 for the 1965 Checker Marathon come from 4 brands — 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: 3.8L 230cid L6 | 7929S | 🇺🇸 US | 3 speed trans.Trans. code T12 | View on Amazon |
| WJB / INMOTION PARTS Fits: 3.8L 230cid 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 for the 1965 Checker Marathon come from 2 brands — NATIONAL and WJB / INMOTION PARTS.
This group includes NATIONAL 7929S and WJB / INMOTION PARTS WS7929S.
O-Rings & Seals
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SCHAEFFLER Fits: 3.8L 230cid L6 | SS2611 | 🇺🇸 US | Rearwith 1.563 In Shaft | View on Amazon |
This table covers the O-rings and seals at this joint.
This group shows a single part: SCHAEFFLER SS2611.
Output Shaft Bearing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKF Fits: 3.8L 230cid L6 | 6307NRJ | 🇺🇸 US | Rear | View on Amazon |
This table covers the Output Shaft bearings. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly.
This group shows a single part: SKF 6307NRJ.
Output Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKF Fits: 3.8L 230cid L6 | 15620 | 🇺🇸 US | Rear | View on Amazon |
This table covers the seals at the Output 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.
One part is listed for the 1965 Checker Marathon — SKF 15620.
Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SCHAEFFLER Fits: 3.8L 230cid L6 | SR3482 | 🇺🇸 US | Rearwith 1.563 In Shaft | View on Amazon |
| SKF Fits: 3.8L 230cid L6 | 99193 | 🇺🇸 US | Shaft Diameter: 1.937 In | View on Amazon |
This table covers the wear sleeves used to restore a grooved seal surface.
2 Repair Sleeve parts for the 1965 Checker Marathon come from 2 brands — SCHAEFFLER and SKF.
Part numbers include SCHAEFFLER SR3482 and SKF 99193.
Shift Shaft Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKF Fits: 3.8L 230cid L6 | 99076 | 🇺🇸 US | Shaft Diameter: 0.750 In | View on Amazon |
| TIMKEN Fits: 3.8L 230cid L6 | KWK99076 | 🇺🇸 US | Kwik-Sleeve | View on Amazon |
This table covers the wear sleeves used to restore a Shift Shaft seal surface.
2 Shift Shaft Repair Sleeve parts for the 1965 Checker Marathon come from 2 brands — SKF and TIMKEN.
Part numbers include SKF 99076 and TIMKEN KWK99076.
Shift Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SCHAEFFLER Fits: 3.8L 230cid L6 | SS3644 | 🇺🇸 US | 3 speed trans.Trans. code T12 | View on Amazon |
| SKF Fits: 3.8L 230cid L6 | 7556 | 🇺🇸 US | View on Amazon | |
| TIMKEN Fits: 3.8L 230cid L6 | 240816 | 🇺🇸 US | Material: S-Nitrile | View on Amazon |
This table covers the seals at the Shift 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.
3 Shift Shaft Seal parts for the 1965 Checker Marathon come from 3 brands — SCHAEFFLER, SKF and TIMKEN.
Part numbers include SCHAEFFLER SS3644, SKF 7556 and TIMKEN 240816.
Torque Converter Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SCHAEFFLER Fits: 3.8L 230cid L6 | SR3509 | 🇺🇸 US | 3 speed trans.Trans. code T12 | View on Amazon |
This table covers the wear sleeves used to restore a Torque Converter seal surface.
This group shows a single part: SCHAEFFLER SR3509.
Buying Automatic Transmission Parts for a 1965 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 1965 Checker Marathon?
Our catalog currently lists 28 automatic transmission parts for the 1965 Checker Marathon across 14 subcategories and 11 brands, covering all 4 engine options (3.8L 230cid L6, 4.6L 283cid V8, 5.2L 318cid V8 and 5.3L 327cid V8). Each part is matched to the engine(s) it fits.
Do automatic transmission parts differ between 1965 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 1965 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 1965 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 1965 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 1965 Checker Marathon
Automatic Transmission Parts for Other Checker Marathon Years
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