Any of these items indicated will require a tear down and analysis of the transmission to prevent a major failure before it happens. Somewhere way past 100,000 miles this surface gets badly worn, and the shift lever action gets sloppy. The flat top surface of the spherical part should sit about flush with a flat surface inside the housing. That results in a nasty noisy rattling vibration of the hand lever at an engine speed right around highway cruising speed in top gear, which may drive you nuts on the open road. Some transmissions have a magnetic drain plug. After a while, this final specimen ended up in The Heritage Motor Center alongside 300 other classic, vintage, and veteran British cars.
I have looked in all the places suggested, plus everywhere else I can to with a light and magnifying mirror, but I cannot find a date stamp. See what is sticking to it if you have one. You need to remove the rear flange nut on the 1600 type gearbox. Then about two years ago something went wrong in the transmission the cluster gears? From under the top cover, remove the interlock arm assembly. One of them is the casting date for the housing. Car was three years old and I had a leak on engine rear main seal.
See article Remote shift housing rebuild. If you have trouble here, refer to removing the top spacer plate repeat over and over and the speedometer drive spindle. Although some leakage on British cars is normal and accepted—and legendary—heavy leaks are indicative of other potential problems and will cause low oil conditions, dangerous to all moving parts in the transmission. I won my case against them. Have fun If ignorance is bliss, I must be the happiest man alive! If the oil is brass colored then a thrust washer is failing. You can't go wrong by calling Dick Moritz.
The following seems to fit my car from what I can see: 1974-½ through 1980 rubber bumper 4. I have heard of this condition only once so hopefully it is rare, possibly a result of incorrect bolt being too long. If you find items in the oil of either unit, both units will have to be dismantled and cleaned to eliminate the contamination of the shared oil unit. If the interlock arm is loose it can be remedied by tightening the shoulder rivet. So if you need to fix this problem, the shift extension assembly should be removed to gain access to the anti-rattle detent parts.
You can make a spline wrench from an old clutch disc by extricating the splined hub from the assembly. Therefore, two days ago I put the car in the shop. At the bottom end of the hand lever is a smaller ball which sits in a cylindrical hole in the rear lever. This morning I picked it up. Insert a thin blade between the tip of the pin and the base of the slot and tap it in to wedge the pin back just a bit. Very few people know how automatic gearboxes actually work, and even fewer people have the knowledge to tear down and rebuild one. Fortunately the year before I had marked all major car parts with a new electric pencil.
Then remove the clutch release arm and front cover save the bearing shims. The ones inside of the main part of the gearbox are usually perfect. The casting number on mine is one of 7 number sets. Removing the front main ball bearing from the input shaft requires removal of the large hex nut in front. A reduction gear starter adds power and reliability.
It is important to realize that the overdrive shares oil with the transmission. Some had Transmission Controlled Spark Advance to overcome problems caused by all the emissions mods which limited vacuum advance to 4th gear only. Picked it up next day and it did not shift the same. If there are metal pieces in the filter something is failing. A bolt on transmission mount. Robert Robert Browning Of course it is possible that no date was stamped on the tranny you have in the car! I am just curious, which I guess is even more dangerous.
I had a 1969 Olds Cutlass Supreme purchased new. Clean the filters and magnets and reassemble. Remember, a transmission is like a metal Cuisinart. Nissan clutch kit includes clutch cover, clutch plate and throw outbearing. Be sure above mentioned spacer plate was removed to allow free rotation of the remote control lever.
The rest of a gearbox rebuild is a fairly simple matter of disassembly, inspection, a few replacement parts, and reassembly. So safely jack up the car and get under it in the center where the transmission is unless you have a Mini! With this new edition, Veloce Publishing has taken over the job of publisher from Haynes. So why are we talking about it here? I did check it, but thanks for asking. Lawn chairs are in the shop and always time to talk. You may also find pieces of a snap ring or circlip in the filter or magnet.