If that nut should back off you will wind up with major problems. The nut will go through the end cover and you could mess up several gears and syncros when the input shaft moves around. I think that this is less common on Deloreans though, the engine isn't all that powerful. If the nut is properly staked on and you are not a maniac with the car it should never come loose (at least on a Delorean!). Don't forget, it is not the 5th gear retaining nut as much as the Input shaft retaining nut. Without it to keep the input shaft in place the input shaft can float "not a good thing". Anyway , it is good to know that parts are plentiful. The transmission is one of the more trouble-free areas of the car, there doesn't seem to be all that many problems with it. Use the braided steel clutch line, Castrol fluid (and change it every 2 years) check the oil level once in a while and don't force any shifts and it seems to last. The only weak points are the shift pin and the 5th gear shift fork when you abuse it. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, Martin Gutkowski <martin@xxxx> wrote: > > Let's not forget the 5th gear retaining nut backing off. I know of 3 > cars in this country that've suffered this fate, my own included, and > the gearbox specialist we use has seen many UN1's with the same issue. > The Lotus guys know about it as do the Alpine guys. It's one of those > "very rare, but it happens" problems! > > All UN1/369 gearbox parts are still available from Renault.... at a price. > > Martin > To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/