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Restoring HB9116754 Lemans
- Thread starter jumpinjan
- Start date
jumpinjan
Bronze Level Sponsor
I did some gear patterns on this factory stock diff for the Lemans. It was dissembled and cleaned. The pinion bearings & carrier bearings look fine, so no replacement bearings needed. The gears look fine too.
So with everything torqued down, I did some pattern checking. If you look at the drive side pattern it is near the toe (acceptable), with no oil. With oil, I expect the backlash to decrease and the pattern will move toward the center, so I think this is a good pattern....and this is with factory shims
Jan
So with everything torqued down, I did some pattern checking. If you look at the drive side pattern it is near the toe (acceptable), with no oil. With oil, I expect the backlash to decrease and the pattern will move toward the center, so I think this is a good pattern....and this is with factory shims
Jan
jumpinjan
Bronze Level Sponsor
The Lemans, 25% overdrive unit repair is coming along fine, but I found a problem in the planetary gears where one gear was binding and hard to turn. The problem was a bad needle bearing in that planet gear. I found a replacement for the two bearings and ordered them from McMaster-Carr.
The brass rod I made to press out the two bearings using my Dake arbor press.
(By the way, the 25% ODs have the double gear planets, while the 32% ODs have a single gear planet. 32% ODs were used in the early S-I Alpines)
Jan
Here's a look at the planetary carrier:
The brass rod I made to press out the two bearings using my Dake arbor press.
(By the way, the 25% ODs have the double gear planets, while the 32% ODs have a single gear planet. 32% ODs were used in the early S-I Alpines)
Jan
Here's a look at the planetary carrier:
Last edited:
jumpinjan
Bronze Level Sponsor
These ODs can be the trickiest things to repair and also getting new parts. I had to find new ball & needle bearings, 32% clutch cone (very different to the 25% clutch) and small miscellaneous pieces. One guy here in the States has some parts and another vendor in the UK is the main supplier. The ball bearings look to be made in china. There's some shimming required on the annulus ball-bearing and I had to make those shims.
Again, I'm working on two ODs on the bench:
Again, I'm working on two ODs on the bench:
Gordon Holsinger
Diamond Level Sponsor
My od was rebuilt in UK but never installed. I bought this from the estate of Wally Swift who was a good friend for 40 years.
When Wally’s Tiger got hit I took the car apart, got the engine rebuilt while another club member did the body work and got the car painted!
