The reason is that the tranny fluid pan has a filter inside. See the interchange info below. There are no electronic or as found in modern transmissions. It has a higher torque rating than the M-35 and M-36. Honestly, how often do people check their trans dipsticks? If the fluid looks good and doesn't smell burnt, then it could likely be a shift solenoid type issue.
The servo arms that hold the bands push againts the case. As is common in automatic transmissions of its generation, power brought to the transmission via the drives hydraulic fluid. If the transmission fluid level on your M35 is low, you need to add fluid through the dipstick tube. This regulates internal pressure by throttle position. The fix for this is to drill a small hole. In both these instances, the transmission will automatically change down into 1st gear when the car speed drops below 5 m. The fluid has to be the right temp, vehicle perfectly level.
I'll reference 140 degrees F for the sake of simplicity. It was used behind the 232 in larger vehicles. The Borg Warner 35 automatic transmission comprises a torque converter and a fully automatic 3-speed hydraulically controlled gear box. More importantly, what does it look and smell like? You should feel the oil if you stick your finger there as it should be just below the circle. Likewise, if it is way below the hole, it needs to be topped off. Prior and contemporary automatic transmissions were very inefficient and would work best with larger, more powerful engines, and even when used in those applications, the engines would often have higher and more power than the manual transmission versions. See the interchange info below.
See the interchange info below. The earlier ones I have seen have a larger hole- and shows in a '64 exploded pic. A disastrous fire in the factory forced makers to develop their own autos and ended its reign. See the interchange info below. There may be European models that were equipped with external coolers.
Both have the model number stamped on them. Be sure the engine is warm when you pull out the dipstick. The difference was that the 196 had different dowel pin sizes. Have the car level, accessible, safe, stable etc. Once this begins to take place the heat and wear inside the transmission increase and can do so very quickly. This usually indicates a higher torque load capability, but may refer to other variations that may not increase torque rating. If it smells burnt then that is another warning sign.
These trannies could be manually shifted as well. If you are having problems with the transmission in your M35, such as clunky shifting or hesitation, check the fluid level first - it is amazing how many drivers pay thousands of dollars for transmission work when a half quart of transmission fluid would have fixed the problem. It is essentially the same as the M-35 except that it has provisions for an external transmission oil cooler. By selecting L from stationary, or before an upward gear change into 2nd gear, the transmission will become locked in 1st gear. As much as the new units come without a dipstick, you can still fill them through an access hole on the side of the trans body - like a diff fill plug.
When adding transmission fluid to your M35, be sure to add it slowly as the transmission fluid capacity is reached quickly and it is difficult to remove excess fluid if you overfill. There is a Throttle Valve in the control valve body that is connected to the throttle linkage via a cable. This article also applies to variations—the M-36 and M-37. Various speed ratios are obtained by holding or clutching various combinations of elements of the planetary train. These two versions are not compatible. If you feel inclined to do it, I'll post some general instructions for dipstick-less systems like these below. If it looks or smells burnt or has particles in it, have a mechanic drain and change the fluid.
Infiniti has been developed sophisticated transmissions through years and it is critical that you add the exact type of transmission fluid stipulated by your owner's manual typically in the back of the manual in a section titled Fluid Capacities. Mechanical switching of gears is triggered by the increase or decrease of pressure. The bottom of this hole usually corresponds to the max level of oil at a certain temperature. The inards in the cast iron units are much larger and stronger than those used in the aluminum case trannies and nothing interchanges. See the interchange info below. The servo arms that hold the bands push againts the case.