The 1972 MG MGB has 38 automatic transmission parts with verified fitment on this page — 13 part types and 9 brands, covering the 1.8L L4 engine. Each part includes a manufacturer part number and application notes.
The automatic transmission on the 1972 MG MGB covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts. The largest groups are Rebuild Kit (8 parts), Extension Housing Seal (5 parts) and Filter (5 parts). The other 10 part types cover the remaining 20 parts.
Every part on this page is matched to the 1.8L L4 — the only engine offered in the 1972 MG MGB.
The most listed brands for 1972 MG MGB automatic transmission parts are ATP (14 parts), PIONEER (13 parts) and WJB / INMOTION PARTS (3 parts), plus 6 more brands. Quality grades include Master Kit, Overhaul Kit and Standard Replacement.
4 parts on this 1972 MG MGB page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including PIONEER 759016 (Extension Housing Seal) and ATP IL150 (Filter). Click any part number to see every vehicle that part fits.
Band
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PIONEER | 767030 | 🇺🇸 US | FrontFlex | View on Amazon |
This table covers the apply bands inside the automatic transmission.
One part is listed for the 1972 MG MGB — PIONEER 767030.
Extension Housing Bushing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | FB12 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| PIONEER | 755176 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the Extension Housing 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 Extension Housing Bushing parts for the 1972 MG MGB come from 2 brands — ATP and PIONEER.
This group includes ATP FB12 and PIONEER 755176.
Extension Housing Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PIONEER Popular | 759016 | 🇺🇸 US 🇨🇦 CA | without Bootwith Flange | View on Amazon |
| ATP | RO4 | 🇺🇸 US 🇨🇦 CA | Trans. code BW351-61/64" O.D. | View on Amazon |
| ATP | HO9 | 🇺🇸 US 🇨🇦 CA | without Bootwith Flange | View on Amazon |
| PIONEER | 759044 | 🇺🇸 US 🇨🇦 CA | Outer Diameter: 1.72" | View on Amazon |
| PIONEER | 759045 | 🇺🇸 US 🇨🇦 CA | Outer Diameter: 2.25" | 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 1972 MG MGB, from PIONEER and ATP. PIONEER 759016 carries the "Popular" badge.
This group includes PIONEER 759016, ATP RO4 and ATP HO9 and the remaining parts above.
Filter
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VARIOUS MFR | PTK22 | 🇺🇸 US | Trans. code T35 | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP Popular | IL150 | 🇺🇸 US 🇨🇦 CA | In-Line Filter KitInline Cooler Filter | View on Amazon |
| ATP | JX150 | 🇺🇸 US 🇨🇦 CA | In-Line Filter KitIncludes: (2) Hoses, (4) Clamps | View on Amazon |
| ATP | JX151 | 🇺🇸 US 🇨🇦 CA | In-Line Filter KitInline Cooler Filter | View on Amazon |
| PIONEER | 745119 | 🇺🇸 US 🇨🇦 CA | Inline Cooler FilterIn-Line Filter Kit | 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.
5 Filter parts for the 1972 MG MGB come from 3 brands — ATP, VARIOUS MFR and PIONEER. The "Popular" part is ATP IL150.
The Economy section lists 1 option from VARIOUS MFR — the catalog's value-priced group. VARIOUS MFR PTK22 is listed in this group.
In the Standard Replacement grade, ATP and PIONEER supply 4 parts: built to original-equipment specification. A representative part number is ATP IL150.
This group includes ATP IL150, VARIOUS MFR PTK22 and ATP JX150 and the remaining parts above.
Fluid Pan Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | RG6 | 🇺🇸 US | Exc. US Assembly | View on Amazon |
| ATP | RG1 | 🇺🇸 US | US Assembly | View on Amazon |
| PIONEER | 749033 | 🇺🇸 US | US Assembly | View on Amazon |
| PIONEER | 749174 | 🇺🇸 US | US Assembly | 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.
4 Fluid Pan Gasket parts for the 1972 MG MGB come from 2 brands — ATP and PIONEER.
Part numbers include ATP RG6, ATP RG1 and PIONEER 749033, among others listed above.
Fluid Pump Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS | WS99168 | 🇺🇸 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 1972 MG MGB — WJB / INMOTION PARTS WS99168.
Fluid Pump Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | RO1 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| PIONEER | 759043 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WJB / INMOTION PARTS | WS480479H | 🇺🇸 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.
3 Fluid Pump Seal parts are listed for the 1972 MG MGB, from ATP, PIONEER and WJB / INMOTION PARTS.
Part numbers include ATP RO1, PIONEER 759043 and WJB / INMOTION PARTS WS480479H.
Governor / Modulator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | RX20 | 🇺🇸 US | View on Amazon | |
| ROSTRA | 510054 | 🇺🇸 US | Brown Stripe Adjustable Modulator Screw-In Type | View on Amazon |
This table covers the governors and modulators that control transmission shift pressure.
2 Governor / Modulator parts for the 1972 MG MGB come from 2 brands — ATP and ROSTRA.
Listed part numbers: ATP RX20 and ROSTRA 510054.
Manual Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NATIONAL | 311189 | 🇺🇸 US | 3 speed trans.with Borg-Warner T35 Transmission | View on Amazon |
| WJB / INMOTION PARTS | WS311189 | 🇺🇸 US | 3 speed trans.with Borg-Warner T35 Transmission | 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 1972 MG MGB, from NATIONAL and WJB / INMOTION PARTS.
Listed part numbers: NATIONAL 311189 and WJB / INMOTION PARTS WS311189.
Rebuild Kit
Master Kit (Overhaul Kit + Friction & Steel Clutch Plates)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP Popular | RM4 | 🇺🇸 US | View on Amazon | |
| PIONEER Popular | 752071 | 🇺🇸 US | Standard Kit | View on Amazon |
| ATP | RM5 | 🇺🇸 US | View on Amazon | |
| PIONEER | 752072 | 🇺🇸 US | Standard Kit | View on Amazon |
Overhaul Kit (Gaskets, Seals, O-Rings & Sealing Rings)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP | RGS6 | 🇺🇸 US | View on Amazon | |
| ATP | RGS7 | 🇺🇸 US | Foreign | View on Amazon |
| PIONEER | 750068 | 🇺🇸 US | Overhaul Kit | View on Amazon |
| PIONEER | 750069 | 🇺🇸 US | Overhaul Kit | View on Amazon |
This table covers the rebuild kits for this assembly.
8 Rebuild Kit parts are listed for the 1972 MG MGB, from ATP and PIONEER. ATP RM4 carries the "Popular" badge.
The Master Kit (Overhaul Kit + Friction & Steel Clutch Plates) section lists 4 options from ATP and PIONEER — grouped under the catalog's "Master Kit (Overhaul Kit + Friction & Steel Clutch Plates)" designation — the notes column spells out what sets them apart. ATP RM4 is listed in this group.
In the Overhaul Kit (Gaskets, Seals, O-Rings & Sealing Rings) grade, ATP and PIONEER supply 4 parts: 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 ATP RGS6.
This group includes ATP RM4, PIONEER 752071 and ATP RM5 and the remaining parts above.
Torque Converter Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SCHAEFFLER | SR3491 | 🇺🇸 US | 3 speed trans.Trans. code T35 | View on Amazon |
This table covers the wear sleeves used to restore a Torque Converter seal surface.
One part is listed for the 1972 MG MGB — SCHAEFFLER SR3491.
Transmission Fluid
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE | VV3246 | 🇺🇸 US 🇨🇦 CA | Max Life Multi-Vehicle or Maxlife Multi-Vehicle Full Synthetic ATF1 Quart | View on Amazon |
| VALVOLINE | 773775 | 🇺🇸 US 🇨🇦 CA | Max Life Multi-Vehicle or Maxlife Multi-Vehicle Full Synthetic ATF1 Gallon | View on Amazon |
| VALVOLINE | 881051 | 🇺🇸 US 🇨🇦 CA | Maxlife Multi-Vehicle Full Synthetic ATF5 Gallon Bay Box | View on Amazon |
This table covers the automatic-transmission fluids specified for this gearbox. Typical signs include harsh or delayed shifts, fluid that smells burnt, or a shudder at light throttle. Use exactly the specification in the notes. Automatic transmissions are unforgiving of the wrong fluid.
3 Transmission Fluid parts for the 1972 MG MGB come from VALVOLINE.
Part numbers include VALVOLINE VV3246, VALVOLINE 773775 and VALVOLINE 881051.
Transmission Mount Bushing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ENERGY SUSPENSION | 101101G | 🇺🇸 US | Performance PolyurethaneTransmission Buffer Mount Set | View on Amazon |
This table covers the Transmission Mount 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 1972 MG MGB — ENERGY SUSPENSION 101101G.
Buying Automatic Transmission Parts for a 1972 MG MGB
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 1.8L L4 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: Rebuild Kit and Extension Housing Seal .
Frequently Asked Questions
How many automatic transmission parts fit the 1972 MG MGB?
Our catalog currently lists 38 automatic transmission parts for the 1972 MG MGB across 13 subcategories and 9 brands, covering the 1.8L L4 engine. Each part is matched to the engine(s) it fits.
What are the signs of automatic transmission problems on a 1972 MG MGB?
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 1972 MG MGB 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 1972 MG MGB?
Every part on this page is matched to the 1.8L L4 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 1972 MG MGB
Automatic Transmission Parts for Other MG MGB Years
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