What type of 4 speed or 5 automatic transmission can replace the stock 3 Chrysler in a jeep grand wagoneer and work with 360 v8 without having to modify anything else?

There isn't a direct, bolt-in replacement for the Chrysler TorqueFlite 3-speed automatic in a Jeep Grand Wagoneer (especially one with a 360 V8) that's a 4 or 5 speed automatic without modifications. The bellhousing pattern, output shaft dimensions, and possibly even the mounting points will be different.

While some transmissions *might* share some similarities, you'd almost certainly need to:

* Adapt the bellhousing: This is a major undertaking, potentially requiring custom fabrication or sourcing a bellhousing adapter.

* Modify or replace the driveshaft: The length and possibly yoke style will be different depending on the transmission.

* Address the computer control: Later automatics (especially 5-speeds) are electronically controlled, and integrating that into the older Wagoneer's electrical system would be a complex project.

* Potential modifications to the transmission cooler lines: The cooler lines may not match up.

In short, while there might be *some* transmissions that *could* be adapted, it's far from a simple swap. You'd be looking at a significant mechanical project requiring expertise and specialized parts. A professional transmission shop would be needed for a successful conversion. Searching for "Jeep Grand Wagoneer transmission swap" on forums dedicated to classic Jeep restorations will likely reveal the complexities and challenges involved and what others have done.