This page lists one automatic transmission part for the 1956 MG Mga: an Extension Housing Seal from BECK/ARNLEY, matched to the 1.5L L4 — the only engine offered in the 1956 MG Mga.
On the 1956 MG Mga, the automatic transmission covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts.
The part number opens a page with every vehicle that part fits.
Extension Housing Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY | 0520403 | 🇺🇸 US | 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.
This group shows a single part: BECK/ARNLEY 0520403.
Buying Automatic Transmission Parts for a 1956 MG Mga
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 1.5L 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: Extension Housing Seal .
Frequently Asked Questions
How many automatic transmission parts fit the 1956 MG Mga?
This page lists one automatic transmission part for the 1956 MG Mga: an Extension Housing Seal from BECK/ARNLEY, covering the 1.5L L4 engine.
What are the signs of automatic transmission problems on a 1956 MG Mga?
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 1956 MG Mga 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 1956 MG Mga?
Every part on this page is matched to the 1.5L 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 1956 MG Mga
Automatic Transmission Parts for Other MG Mga Years
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