> >As I read the truck discussions on some of the farm pages, the thing to >watch out for in the NV 5 and 6 speed transmissions is the nut that >holds the 5th gear to the shaft. It tends to come loose and cause a >mess. I suspect looseness is detectable before there's damage, but >people making a truck work don't necessarily pause for prevention. > There has been a serious problem with the nut that holds 5th gear on the 5 speed NV4500 although the problem appears to have been solved with a new style of nut. This nut is put on with locktite, torqued to 350 ft lbs and then has an allen screw that tightens it further Apparently it does not give any warning but is not disabling as many of our transport drivers have had to return home in 4th gear. The fifth gear is mounted on the rear of the transmission in the tailshaft housing. When the nut comes off it slides back along the output shaft and the gear works off the splines and end up riding on the shaft also. I have not personally experienced the problem and do have the newest nut on mine. I have known others to see it within 30k miles. There has been at least one class action lawsuit filed because of this problem which only seems to appear on the Dodge diesels. At least I have not heard of it on a chev. I also have not heard of the problem on the six speed but they are few and far between at this point. If it is a regular problem I will hear of it soon since our guys log so many miles compared to the average user. Anyone considering a used Dodge Turbo diesel 99 or older would do well to find out if "the fix is in" Rick Davis 1602 Jamestown, Tn 54 safari 69 Ambassador 70 Globetrotter To unsubscribe or to change to a daily Digest, please go to http://www.airstream.net/vaclist/listoffice.html If replying back to this message, please delete all the unnecessary original text from your reply.
