Hey also looking for details as far as the RB25DET auto into an 89 240SX. Engine is running and moves as far as it going from 1st and 2nd gear. It does not shift into 3rd gear...... Bought a new automatic transmission computer for the 89 240sx. This still did not fix the problem.. Please help just need to figure out how to get all gears working properly. Text or call (605)350-4521 or write me back here or [email protected] Thank you so much!!! If needed a payment for information will do just need the project to be completed.