Hi, i think its my first post, but i'm doing a full service on Cabrio 1987 with 18.000 miles. The car an engine are in great conditions, but most of the gaskets/plastic/rubber/seals are inidicating its age. I was in the plan to replace shifter shaft seal, so I take down the gear box pan, the 3 springs, 2 separators and 3 ball bearins came as expected, but additionaly 3 things came out and they look smashed some how. The car is running fine, and shift are all precise, fast and effforless. Can some one tell me where are this from? and if it s important (looks like its no...) Image Unavailable, Please Login Image Unavailable, Please Login
They are components of one of the syncro ring selection mechanisms -- see items 24, 25, and 28 here: https://www.ferrariparts.co.uk/diagram/ferrari/32-mondial---cabriolet/031-lay-shaft-gears Looks like the Selector Block 24 broke/fractured allowing the spring 25 and pawl 28 to fall out.
Unfortunately, I don't think that it can be replaced without disassembling the Lay Shaft components from the Lay Shaft (and, therefore, most of the gearbox) as an (unbroken) Selector Block 24 is captively held in place by the Outer Syncro Sleeve 22 -- i.e., Outer Syncro Sleeve 22 has to move a large distance away from the Inner Syncro Sleeve 27 to install the Selector Blocks 24. You might want to drop the gearbox pan to ensure that you recover the rest of the broken 24 part (and the spring looks a little broken, too, like there might be more pieces). My guess would be that having only 2 of the 3 Selector Blocks in place isn't great, but not sure if it's instantly fatal (if the broken pieces didn't cause the gearbox to grenade when it broke ) -- as you indicated, you haven't noted any problem (yet?), but it probably would cause some uneven wear somewhere eventually.
yes I removed the gearbox pan, and I think 100% of that syncro pin, spring and block are out ... is there a inspection door from the left of the gearbox, maybe moving the LayShaft give space to take the outer syncro sleeve and put the trio (ping/spring/block) without completelly removing the layshaft from the car?
i have done a lot of racing bikes, and most use a "cassette gear box" , basically you just remove the side cover of the gearbox, and after removing the out side controls, you can get both shafts within secconds without removing the gearbox from the bike... i will check if its possible and confirm
another question... how many liters takes the gearbox? I see the manual says 4, but most of the posts talk about 5... I know its until "the filler hole starts bleeding", but the starting reason for the procedure was I found like half a liter more than 4 (yes 4.5) so I suspected oil from the engine was going to the gearbox... maybe its not the case then?
I believe it's 4 liters, but many post here are US-based posts so that requires buying 5 quarts of gearbox oil. Your overfill could be engine oil getting into the gearbox, but it can also be someone adding a little too much gearbox oil into the transfer gear reservoir after the main reservoir has been closed, or adding it all into the transfer gear reservoir fill plug and not waiting long enough to let the excess drain out and just closing the main reservoir immediately when some appears at the main reservoir fill plug. I would suggest that you add something like .25 liter into the transfer gear reservoir fill plug and then proceed with putting the rest of it thru the main reservoir fill plug (that should give enough time for the excess in the transfer gear reservoir to make its way into the main reservoir), or, if you add it all thru the transfer gear reservoir fill plug, wait a long time for the excess to drain out before closing the main reservoir fill plug.
Ok... Will replace the seal anyway... Will inspect all gears tomorrow to confirm if the other two synchs are un placer
Don't disagree at all -- if you've already got the gearbox pan off, makes perfect sense to refresh the shift shaft seals (and maybe even the shift shaft boot) unless they were just recently replaced.
