[cerberusiam]

Originally Posted by MSkyrman

I am now getting a MIL with code P1740-Rationality Error detected in Tcc solenoid or OD solenoid...does this additional info change anything in your recommendations? No other symptoms with the tranny...just towed 1,500 miles from Mass to Florida. Is this repair work you mention above constitute a tranny "rebuild", or is that something more involved and more $$$?

It depends on what is causing the issue. Now the other 2 solenoids are showing issues that indicate they are not reacting like they should.

Your original problem has been cured by changing the gov solenoid. If you have not done that yet, its the first step. The P1740 could be the solenoids getting dirty, the wrong fluid, or possibly the TC going bad.

If you have been doing a lot of towing over the life of the trans it may be time to pull it apart and check things out. The diretc clutches and TC clutch are the weak points and once they start going its time to rebuild.

FYI, do NOT order just a VB. Find a competent builder and have your done. With too many of the VB swaps you are getting a modified 47RE VB because there are so many more of them available. While they work there are subtle nuances that throw gremlins into a 48RE system that make it har dif not impossible to resolve issues.