Morris Minor/MG Midget/AH Sprite Ribcase gearbox stripdown overhaul and rebuild (part 1 of 3)

A 3 part series to show the stripping, overhaul and rebuild of the 4 speed Ribcase gearbox fitted to the AH sprite, Morris Minor and MG midget. Doing this for the first time using garage tools i aim to show how you can overhaul your gearbox as well
1:49 Side cover removal
2:00 Front cover removal
2:45 Remove plungers
3:50 Remove rear case
4:24 Remove selector levers
6:07 Remove layshaft and reverse shaft
6:48 Remove gearset
7:25 Remove input shaft
8:09 Laygear end float check
9:17 Rear case disassembly
9:40 Remote housing disassembly

[@misunderestimator5283]

Thanks for posting this. I’m gonna have a go at the rib case from my A40 farina note that the mysteries have been unlocked a little 🙂

[@mgmidget-thebirthofaraceca4349]

Glad I could help

[@kellybreen5526]

Thanks for posting. I have the less loved 1500 Midget, but the concepts are the same. Right now I have no real problems with the car, but I drive it about 7 months per year, so problems will come in due course.

[@mgmidget-thebirthofaraceca4349]

Good luck with the build. Thanks for watching

[@D2KMotors]

This will be great when we need to dig into our camaro transmission

[@mgmidget-thebirthofaraceca4349]

Thanks for watching

[@jptoro2007]

I am a about to rebuild my 1275 transmission. Would it be possible to share the link for the video in normal video camera speed? Want to make sure I do not miss a step. Your videos are excellent and encouraging. Thank you.

[@mgmidget-thebirthofaraceca4349]

Apologies, the original videos are deleted now

[@nickb5391]

These type gearboxes originate from the Austin A30 from 1951 which was designed by Austin & used later in the Morris Minor (1952), A40 Farina (1958) & Austin Healey Sprite (1958) & M G Midget (1961)

[@mgmidget-thebirthofaraceca4349]

thanks for the feedback and thanks for watching

[@therochandima6489]

Thank you very much. I am from sri lanka

[@mgmidget-thebirthofaraceca4349]

You are welcome

[@ethan073]

What literature did you use as reference for how to take it apart and the various tolerance specs etc?

[@mgmidget-thebirthofaraceca4349]

A Haynes manual and 30 years of automotive engineering experience 😁👍 thanks for watching . Hope you find it useful

[@patrickfitzhorn6716]

Great videos - thanks. One issue I'm having. I cannot remove the c-clip off the input shaft bearing retainer. It sits in a machined groove and all of my attempts to open the clip only serve to snug it up along the outside lip of the groove, without any "daylight" between the clip and the retainer. Cannot get a tool in anywhere when the clip is open. How did you solve that problem?

[@mgmidget-thebirthofaraceca4349]

the large C clip is sitting in the bearing itself (it has a groove in it). the size of the input shaft end means it has to go into the case to be removed so you have the take the clip off the bearing to be able to knock the input shaft through. i was using small screwdrivers, metal pointed scribes and thin blades to open the clip and then get under it to lever it up. i guess it could be corroded into the bearing which could make life hard. another approach you could try is tapping the input shaft out the wrong way as far as it will go (use heat on case if necessary) to move the clip a small amount away from the case making it easier to remove as it wouldnt be lodged hard up against the case. good luck and let me know how you get on.

[@rowanhobbb2762]

What rebuild kit will did you purchase

[@mgmidget-thebirthofaraceca4349]

One off of a popular auction website 👍

[@user-iu6mq7sj7y]

I have Morris Minor 1000, it's second gear suddenly realized, how to fix this trouble

[@mgmidget-thebirthofaraceca4349]

Sorry, not sure i understand your problem. can you explain more? thanks for watching and hope its helped you solve your problem.

[@user-iu6mq7sj7y]

I have a Morris Minor 948cc car. When it is driven in second gear, the second gear is released when the accelerator is released.

[@mgmidget-thebirthofaraceca4349]

Understand. I have a gearbox which jumps out of first at high revs so similar problem. Every cause is different but I would be looking to check the condition of 3 things here. Firstly check the condition of the gears themselves, any damage, broken teeth, excessive wear in the problem gear should be replaced. Next check the Baulk rings (synchro rings) for wear. look online for the dimension between gears and if excessive replace these. Finally check the selector rods. the balls and springs hold the rods in place and hence the gears in place. If these are worn or damaged they wont hold the gears in place properly. Hope that helps and gives you a place to start looking

[@user-iu6mq7sj7y]

Ok, I will check, thanks friend

[@user-iu6mq7sj7y]

Dear friend, please explain to me how to install piston rings to Morris Minor 1000 piston, I want to know rings installing order

[@johanjanssen4637]

Would this rebuild the ribbed gearbox on Morris Minor 1098cc engine 1969

[@mgmidget-thebirthofaraceca4349]

Not sure but the principles will be the same