'93 Mayfair gearbox repair

[MiniR2]

Well had a bit of spare time today, so thought I would finally get around to taking the Mayfair apart to find out why I have no 4th or Reverse gears.

Not much to show for my efforts today, but have some poor qualitly pictures to look at. More tommorrow hopefully






Was quite suprised how good nick the car is in, has been fully undersealed from new.

[MiniR2]

Didn't get as much done today as I had hoped, mainly due to the fact I couldn't find my 1" 1/2 socket for the torque conv bolt

First thing that surprised me was how clean the engine is


Torque conv. had surface rust on, but nothing major


After removing the governor, I noticed that the return spring has been damaged. When compressed, it was coming out of the side of the mechanism and getting trapped. Can't see this is cause the gear problems I've been having, but will replace it anyways



Next up I noticed that the start interlock switch bracket was bent, I guess this is why I had to wiggle the gear selector to get it to start sometimes



The forward clutch assembly is showing signs of damage to the casing, but nothing that would affect its operation. I'm at a loss to explain the heat marks, anyone got any ideas?



Thats as far as I got today, not as much as I would like to have done, but at least I found somethings wrong. I also found loads of gunk in the valve block.

[MiniR2]

Well today I finally found out the cause of the gear change problems. This picture shows the Reverse clutch band. It appears something has become caught under the band and taken the friction material off.




When I striped the top & reverse clutch down I found lots if scoring marks on the metal plates and no friction material at all on the clutch disc's. This pictures shows what a good clutch plate looks like vs the one of the plates removed from the clutch assembly.




The rest of the engine seems in very good condition with very little wear on any of the components

[mollymoke]

Thanks for sharing, the photos are great and a good reminder why we should replace our oil 'more often' try and avoid that bit of something doing this type of damage.
Keep us up to date

[MiniR2]

No new pictures i'm afraid, but the car is back on the road on driving

Am going to run in for approx 50 miles then change the oil again just to make sure I have got rid of all the gunk that was in there. Might also whip the front cover off and re-check the brake band adjustments

[lyny]

Hi, how's things? photos are aweseome, I have auto gearbox trouble, do you have a 1275 auto gearbox and would you be intereste in fixing? Lyn