* Bellhousing to Engine Block: These are the most likely culprits for "hidden" bolts. You'll need to work your way around the bellhousing (the housing connecting the engine to the transmission). Many are accessible from the top, but some may require reaching from underneath the vehicle. A flexible extension and a swivel socket will be your best friends. Look very carefully between the engine and transmission. Often, bolts are tucked away in tight corners or partially obscured by other components.
* Torque Converter Bolts (Automatic Transmission Only): If you have an automatic transmission, there might be bolts securing the torque converter to the flexplate. These are typically accessed from the back of the engine, requiring removal of the starter and possibly other components. This area is notoriously difficult and requires a good understanding of the engine layout.
* Transmission Mount Bolts: While not directly connecting the transmission to the engine, these bolts secure the transmission to its mount, which in turn supports it on the engine. Loosen these *after* separating the transmission from the engine. These will be very close and look very similar to the other bolts.
To find the elusive bolts:
1. Consult a Repair Manual: This is crucial. A factory service manual for your specific year and model LeSabre will have diagrams showing the location of *all* transmission-to-engine bolts. This is the single best resource you can use. Haynes and Chilton manuals are cheaper alternatives, but factory manuals are more detailed and accurate.
2. Thorough Visual Inspection: Carefully examine the bellhousing from both the top and the bottom. Use a flashlight and a mirror to see into tight spaces.
3. Work Methodically: Don't rush. Systematically work your way around the bellhousing, checking for any bolts that might be hidden behind components.
4. Use a Mechanic's Light: A strong, flexible mechanic's light will illuminate hidden areas much better than a regular flashlight.
5. Digital Camera or Smartphone Camera: Take pictures as you go. This can help you keep track of which bolts you've removed and help you see things from different angles.
Important Safety Precautions:
* Support the Transmission: Before disconnecting any bolts, securely support the transmission using a transmission jack. The transmission is heavy and can cause serious injury if it falls.
* Disconnect the Battery: This is a standard safety precaution before working on any vehicle's electrical system.
* Proper Tools: Use the correct sockets and wrenches to avoid damaging bolts.
If you're not comfortable performing this repair yourself, it's highly recommended to take your LeSabre to a qualified mechanic. Transmission removal is a complex procedure, and mistakes can lead to significant damage.
