How To Remove Differential From Axle Casing On An MGB

How to remove MGB Differential from Axle Casing

This guide captures ‘bygone’ advice on how to Remove the differential from an Axle casing on an MGB.

It is part of my series on MGB Differential Rebuild.

Go here for all my Classic Car Maintenance DIY Guides or visit SCOTTYS Technical Library and Supplier Library 

Useful information for Classic Car and Retro Car enthusiasts, as many of these tasks are no longer required on modern day cars.

Remember folks these are ‘bygone guides’ … useful but the safety and personal protective equipment measures are reflective of bygone awareness. Stay safe.





MGB Rear Axle Exploded View
This exploded view of an MGB “Salisbury” semi-floating rear axle shows the components which are involved in the overhaul

Step By Step Remove Differential from Axle Casing

Undo the twelve bolts which hold the differential cover in place and remove the cover and gasket.

Use a sharp centre­ punch or chisel to mark each bearing cap so that they can be replaced correctly.

How To Remove An MGB Differential
After removing the cover. use a hammer and a chisel to mark the two bearing caps so that they can be replaced correctly

Then undo the two bolts which secure each cap and lift away both of the caps.

Now use a socket spanner to undo the two bolts which secure each bearing cap so that the caps can be lifted away
How To Remove An MGB Differential Pic2

It may now be necessary to stretch the casing so that the differential carrier can be extracted and BL special tool 18G 131 C will be required to do this job. I doubt you will find one of these yet in many cases the carrier assembly can be prised out without stretching the casing simply by levering out the unit with the wooden handle of a hammer.

How To Remove An MGB Differential Pic 3
In many cases the carrier assembly can be prised from the casing by levering it out with the wooden handle of a hammer

Now lift out the spacers from the casing.

How To Remove An MGB Differential Pic4
Lift the carrier out of the casing together with the bearing races and place the assembly on a clean work-bench

Head back to MGB Differential Rebuild to select the next stage instructions.


Useful MGB Diff Parts on eBay


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