Posting an issue that my friends 1998 Berlinetta is experiencing. On a drive 2 years ago his clutch slave ruptured and left him stranded on a main road. In an attempt to get the car to a safe spot on a side road he forced the car in gear by holding the gear lever into gear and driving the car a few meters. The car was towed to me and I replaced the throw out bearing and flange with Hill Engineering parts. On the first drive it was apparent that second synchro was gone as it wouldn’t select second and made an awful grinding noise when trying to select it. It was then sent to local specialist for an expensive gearbox removal and they replaced the second gear synchro. Since then first gear is mostly impossible to select unless you double clutch into first. I have adjusted the linkage, changed the pressure plate, flywheel, clutch etc. Clutch line bled and no leaks in the circuit. It has has fresh gear oil and is impeccably maintained otherwise. What would be the next step? I’m thinking it’s perhaps the 1-2 selector fork? We have just ordered that part but just wanted to see if anyone else has had an issue like this. Here is a video of the car with engine running and the issue highlighted: https://youtube.com/shorts/uY6zL3zzjDA?feature=share hopefully we can sort this out as it’s an issue my friend really wants to address.
Not on my car but I find my motorcycle years sometimes mimic this I believe you are correct and they should have in my opinion checked that shift fork I had a similar problem with my zx7 RR. When the first gear dogs rounded and I had to hold in gear at a race I took the transmission apart and replaced and undercut the gear box so this would not happen again but changed the shift fork as when I bench tested it it was not working as it shouldalso not it buggered the engagement gear as well so I had to re-lace 2 gears not just the one. I guess it could have been rebuilt wrong but you will know once you remove it. I would have thought they would be thick enough but I can not answer as I have not enough experience to comment on the mechanics Sorry Elliot Good luck
Elliott did the shop inspect the box when they had it out of the car or did they just slap a new synchro on 2nd and call it a day? Seems like a call to the shop is in order, especially since the problem has been present since day one.
Yes it seems it was a quick removal and slap in a new synchro. To be fair it fixed the shifting issue that prevented second gear selection but not fully did the gearbox service bring it back to how it was before the clutch slave ruptured. So we know the gearbox is sound otherwise. Something tells me there is a selector issue has the adjustment range window to have the gears operational is very minute. One fraction either way and it won’t select most gears.
Just watched the video. If it was an internal gearbox problem it seems strange that pumping the clutch pedal would have any affect on it. Likewise for a linkage problem (such as a slightly bent component) between the shifter and gearbox input shaft. So it never goes into 1st with single depression of the clutch but it does every time when you double-pump it? (I'm saying double-pump because that's not really double-clutching, which you do while driving, not while idling). I wonder if there is indeed an internal problem and double-pumping the clutch MC builds up just a little more pressure and movement in the slave cyl to overcome whatever is bent or damaged inside?
He should have replaced the 1st, 2nd, and 3rd gear synchros as well as the shift sleeves for 1-R and 2-3 gears. Doing it peacemeal (with gearbox) get you this. Now you have to do it again.
It does occasionally go in, without double pumping. It does seem strange, but we have exhausted all the other areas that could be an issue - which is why I’m certain it’s an internal issue and has to do with how the gearbox was rebuilt.
Yeah this is the sort of thing he needs to hear. I think the technician who performed the work while skilled, opts for the cheapest way out of the problem and the owner has resigned himself to the fact that the gearbox has to come out again we just wanted some guidance as to what is the proper procedure to fix it properly. The owner isn’t tight on maintenance, and this is why it’s not going back to the same tech to correct it. Thanks for the input.
