50 Automatic transmission parts are listed for the 1978 Excalibur Phaeton, in 19 part types, covering the 7.4L 454cid V8 engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 1978 Excalibur Phaeton, 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 (5 parts), Fluid Pan Gasket (5 parts) and Governor / Modulator (5 parts). The other 16 part types cover the remaining 35 parts.
Every part on this page is matched to the 7.4L 454cid V8 — the only engine offered in the 1978 Excalibur Phaeton.
The most listed brands for 1978 Excalibur Phaeton automatic transmission parts are ATP (7 parts), DURA-BOND (7 parts) and PIONEER (6 parts), plus 12 more brands. Quality grades include High Performance, Economy and Standard Replacement.
3 parts on this 1978 Excalibur Phaeton page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including NATIONAL 9449 (Extension Housing Seal) and FEL-PRO TOS18621 (Fluid Pan Gasket). Click any part number to see every vehicle that part fits.
Band
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | JX58 | 🇺🇸 US | Front | View on Amazon |
| ATP | JX60 | 🇺🇸 US | Reverse | View on Amazon |
| PIONEER | 767043 | 🇺🇸 US | Front | View on Amazon |
| PIONEER | 767017 | 🇺🇸 US | Reverse | View on Amazon |
This table covers the apply bands inside the automatic transmission.
4 Band parts are listed for the 1978 Excalibur Phaeton, from ATP and PIONEER.
Part numbers include ATP JX58, ATP JX60 and PIONEER 767043, among others listed above.
Bushing Kit
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DURA-BOND | TK54 | 🇺🇸 US | View on Amazon | |
| DURA-BOND | TK54HP | 🇺🇸 US | High Performance Kit | View on Amazon |
This table covers the Bushing kits.
2 Bushing Kit parts for the 1978 Excalibur Phaeton come from DURA-BOND.
This group includes DURA-BOND TK54 and DURA-BOND TK54HP.
Center Support Bushing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DURA-BOND | 02101 | 🇺🇸 US | Center Support | View on Amazon |
This table covers the Center Support bushings. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles.
This group shows a single part: DURA-BOND 02101.
Dipstick / Fluid Filler Tube Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | JO16 | 🇺🇸 US | Intake Filler Tube To CaseElectrical Connector | View on Amazon |
| PIONEER | 762008 | 🇺🇸 US | Intake Filler Tube To CaseElectrical Connector | 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 1978 Excalibur Phaeton, from ATP and PIONEER.
This group includes ATP JO16 and PIONEER 762008.
Extension Housing Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NATIONAL Popular | 9449 | 🇺🇸 US | General Motors trans. | View on Amazon |
| BCA | NS9449 | 🇺🇸 US | External Markings: 1.890 X 2.700 X 0.582 | View on Amazon |
| SCHAEFFLER | SS2960 | 🇺🇸 US | Type of construction: FmsaMetal, Spring, Auxiliary Lip | View on Amazon |
| WJB / INMOTION PARTS | WS9449 | 🇺🇸 US | Width (In): 0.58199999999999996 In | View on Amazon |
| WJB / INMOTION PARTS | WS5208 | 🇺🇸 US | Material: NitrileWidth (In): 1 in | 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.
5 Extension Housing Seal parts are listed for the 1978 Excalibur Phaeton, from WJB / INMOTION PARTS, NATIONAL, BCA and 1 other brand. NATIONAL 9449 carries the "Popular" badge.
This group includes NATIONAL 9449, BCA NS9449 and SCHAEFFLER SS2960 and the remaining parts above.
Filter
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | TF29 | 🇺🇸 US | OE Replacement | View on Amazon |
| VARIOUS MFR | PT220 | 🇺🇸 US | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | B29 | 🇺🇸 US | Includes: (1) Gasket, (1) ScreenPremium Replacement | View on Amazon |
| PIONEER | 745041 | 🇺🇸 US | Includes (1) Gasket, (1) Screen | View on Amazon |
This table covers the replacement filters for this application — the table heading and notes say which circuit. Typical signs include restricted flow — long cranking, weak airflow, or dirty fluid after a short interval. Seat the new filter so it cannot bypass, and use the grade the notes call for.
4 Filter parts for the 1978 Excalibur Phaeton come from 3 brands — ATP, VARIOUS MFR and PIONEER.
The Economy section lists 2 options from ATP and VARIOUS MFR — the catalog's value-priced group. ATP TF29 is listed in this group.
In the Standard Replacement grade, ATP and PIONEER supply 2 parts: built to original-equipment specification. A representative part number is ATP B29.
Listed part numbers: ATP TF29, VARIOUS MFR PT220 and ATP B29, plus the other parts above.
Fluid Pan Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO Popular | TOS18621 | 🇺🇸 US | View on Amazon | |
| MAHLE / CLEVITE | W39341 | 🇺🇸 US | Cork-RubberAutomatic Transmission Oil Pan Gasket | View on Amazon |
| MAHLE / CLEVITE | W39341TC | 🇺🇸 US | Cork with Metal CarrierAutomatic Transmission Oil Pan Gasket | View on Amazon |
| VICTOR REINZ | 711493800 | 🇺🇸 US | 13 Bolt | View on Amazon |
| VICTOR REINZ | 711989300 | 🇺🇸 US | Enhanced Design | 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.
5 Fluid Pan Gasket parts for the 1978 Excalibur Phaeton come from 3 brands — MAHLE / CLEVITE, VICTOR REINZ and FEL-PRO. The "Popular" part is FEL-PRO TOS18621.
This group includes FEL-PRO TOS18621, MAHLE / CLEVITE W39341 and MAHLE / CLEVITE W39341TC and the remaining parts above.
Fluid Pump Bushing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DURA-BOND | 44034 | 🇺🇸 US | Pump body | View on Amazon |
| DURA-BOND | 44034TG | 🇺🇸 US | Dry Film Lubricated | View on Amazon |
This table covers the Fluid Pump bushings. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles.
2 Fluid Pump Bushing parts for the 1978 Excalibur Phaeton come from DURA-BOND.
Listed part numbers: DURA-BOND 44034 and DURA-BOND 44034TG.
Fluid Pump Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA | NS88187 | 🇺🇸 US | Frontwith THM400 Transmission Code | View on Amazon |
| NATIONAL | 99187 | 🇺🇸 US | General Motors trans. | View on Amazon |
| WJB / INMOTION PARTS | WS99187 | 🇺🇸 US | FrontGeneral Motors trans. | View on Amazon |
This table covers the precision wear sleeves used to restore a transmission pump seal surface.
3 Fluid Pump Repair Sleeve parts are listed for the 1978 Excalibur Phaeton, from BCA, NATIONAL and WJB / INMOTION PARTS.
Part numbers include BCA NS88187, NATIONAL 99187 and WJB / INMOTION PARTS WS99187.
Fluid Pump Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA | NS6712NA | 🇺🇸 US | Front | View on Amazon |
| NATIONAL | 6712NA | 🇺🇸 US | FrontGeneral Motors trans. | View on Amazon |
| WJB / INMOTION PARTS | WS6712NA | 🇺🇸 US | FrontGeneral Motors 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.
3 Fluid Pump Seal parts are listed for the 1978 Excalibur Phaeton, from BCA, NATIONAL and WJB / INMOTION PARTS.
Listed part numbers: BCA NS6712NA, NATIONAL 6712NA and WJB / INMOTION PARTS WS6712NA.
Governor / Modulator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP Popular | JX76 | 🇺🇸 US | Adjustable 12-19.5 - EDA 2.48 - Black/Red - with EGR | View on Amazon |
| PIONEER | 747024 | 🇺🇸 US | Adjustable 12-19.5EDA 2.48 | View on Amazon |
| ROSTRA | 510017 | 🇺🇸 US | Dual Red Stripe Modulator | View on Amazon |
| ROSTRA | 510020 | 🇺🇸 US | ModulatorBlack & Red Stripe | View on Amazon |
| ROSTRA | 510062 | 🇺🇸 US | Single Red StripeAdjustable Modulator | View on Amazon |
This table covers the governors and modulators that control transmission shift pressure.
5 Governor / Modulator parts for the 1978 Excalibur Phaeton come from 3 brands — ROSTRA, ATP and PIONEER. The "Popular" part is ATP JX76.
This group includes ATP JX76, PIONEER 747024 and ROSTRA 510017 and the remaining parts above.
Kickdown Solenoid
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ROSTRA | 520604 | 🇺🇸 US | View on Amazon |
This table covers the Kickdown solenoids. Typical signs include a harsh or missing shift, or a code for this solenoid circuit. Check resistance and the connector before dropping the pan for a solenoid.
One part is listed for the 1978 Excalibur Phaeton — ROSTRA 520604.
Output Shaft Bushing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DURA-BOND | 8624988 | 🇺🇸 US | Output Shaft (Narrow) | View on Amazon |
This table covers the Output Shaft bushings. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles.
One part is listed for the 1978 Excalibur Phaeton — DURA-BOND 8624988.
Output Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SCHAEFFLER | SS2962 | 🇺🇸 US | Seal KitType of Construction: FM | 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.
This group shows a single part: SCHAEFFLER SS2962.
Rebuild Kit
Deluxe Kit (Master Kit + Filter, Band & Common Bushings)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PIONEER | 753024 | 🇺🇸 US | Includes: All paper gaskets, Pan gasket, Rubber O rings, Rubber Lip seals, metal clad seals, sealing rings, Friction Clutch plates, Steel Clutch Plates, Filter, Front & Rear Bushings, 2 Bands,and Modulator.PLUS Kit | View on Amazon |
Master Kit (Overhaul Kit + Friction & Steel Clutch Plates)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | JMS9 | 🇺🇸 US | Includes: All paper gaskets, Pan gasket, Rubber O rings, Rubber Lip seals, metal clad seals, sealing rings, Friction Clutch plates, Steel Clutch Plates, Filter, Front & Rear Bushings, 2 Bands,and Modulator.PLUS Kit | View on Amazon |
Overhaul Kit (Gaskets, Seals, O-Rings & Sealing Rings)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TRANSTEC | 81000348 | 🇺🇸 US 🇨🇦 CA | without PistonsDuraprene Pan Gasket | View on Amazon |
This table covers the rebuild kits for this assembly.
3 Rebuild Kit parts are listed for the 1978 Excalibur Phaeton, from PIONEER, ATP and TRANSTEC.
In the Deluxe Kit (Master Kit + Filter, Band & Common Bushings) grade, PIONEER supplies 1 part: grouped under the catalog's "Deluxe Kit (Master Kit + Filter, Band & Common Bushings)" designation — the notes column spells out what sets them apart. A representative part number is PIONEER 753024.
The Master Kit (Overhaul Kit + Friction & Steel Clutch Plates) section lists 1 option from ATP — grouped under the catalog's "Master Kit (Overhaul Kit + Friction & Steel Clutch Plates)" designation — the notes column spells out what sets them apart. ATP JMS9 is listed in this group.
In the Overhaul Kit (Gaskets, Seals, O-Rings & Sealing Rings) grade, TRANSTEC supplies 1 part: grouped under the catalog's "Overhaul Kit (Gaskets, Seals, O-Rings & Sealing Rings)" designation — the notes column spells out what sets them apart. A representative part number is TRANSTEC 81000348.
Part numbers include PIONEER 753024, ATP JMS9 and TRANSTEC 81000348.
Shift Improvement Kit
Daily Driver
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TRANSGO | SK400 | 🇺🇸 US | Shift KitFor 400 Transmissions | View on Amazon |
High Performance
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TRANSGO | 40012 | 🇺🇸 US | Reprogramming KitWith Gear Command | View on Amazon |
| TRANSGO | 4003 | 🇺🇸 US | Reprogramming KitWith Manual Shift Control | View on Amazon |
| TRANSGO | 400PRO | 🇺🇸 US | Reprogramming KitWith Gear Command | View on Amazon |
This table covers the Shift Improvement kits.
4 Shift Improvement Kit parts for the 1978 Excalibur Phaeton come from TRANSGO.
In the Daily Driver grade, TRANSGO supplies 1 part: grouped for everyday commuting duty. A representative part number is TRANSGO SK400.
The High Performance section lists 3 options from TRANSGO — engineered beyond original-equipment specification. TRANSGO 40012 is listed in this group.
This group includes TRANSGO SK400, TRANSGO 40012 and TRANSGO 4003 and the remaining parts above.
Stator Support Shaft Bushing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DURA-BOND | 8623944 | 🇺🇸 US | Stator Support (Front & Rear), Sun Gear Shaft (Front & Rear)Bronze | View on Amazon |
This table covers the Stator Support Shaft bushings. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles.
This group shows a single part: DURA-BOND 8623944.
Torque Converter
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TC REMANUFACTURING | B3M | 🇺🇸 US | Reman. | View on Amazon |
| TC REMANUFACTURING | B3 | 🇺🇸 US | Standard Stator, 3 Mounting PadsMedium Stall | View on Amazon |
This table covers the Torque converters. Typical signs include a sulfur smell, rattling substrate, or an efficiency code. Confirm CARB vs Federal certification in the notes before ordering.
2 Torque Converter parts for the 1978 Excalibur Phaeton come from TC REMANUFACTURING.
Part numbers include TC REMANUFACTURING B3M and TC REMANUFACTURING B3.
Torque Converter Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SCHAEFFLER | SR3506 | 🇺🇸 US | 0.531 In Width1.875 In Inside Diameter | View on Amazon |
This table covers the wear sleeves used to restore a Torque Converter seal surface.
One part is listed for the 1978 Excalibur Phaeton — SCHAEFFLER SR3506.
Buying Automatic Transmission Parts for a 1978 Excalibur Phaeton
On this vehicle, the automatic transmission covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts.
- Confirm you have the 7.4L 454cid V8 engine — every part on this page is matched to it.
- 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 Pan Gasket .
Frequently Asked Questions
How many automatic transmission parts fit the 1978 Excalibur Phaeton?
Our catalog currently lists 50 automatic transmission parts for the 1978 Excalibur Phaeton across 19 subcategories and 15 brands, covering the 7.4L 454cid V8 engine. Each part is matched to the engine(s) it fits.
What are the signs of automatic transmission problems on a 1978 Excalibur Phaeton?
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 1978 Excalibur Phaeton 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 1978 Excalibur Phaeton?
Every part on this page is matched to the 7.4L 454cid V8 engine. 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 1978 Excalibur Phaeton
Automatic Transmission Parts for Other Excalibur Phaeton Years
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