[techteacher]

will a 1990 e40d fit a 1997 both diesel 4x4

 

[countryboyrob]

should.

 

[speeddemon31176]

It will bolt up with no problem. The issue you are going to run into is the connector for the solenoid pack. The older trans has a different plug configuration. You could swap the solenoid pack out with no problem though if yours is still good or just buy a new solenoid pack for it. They aren't very expensive.