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Holley Terminator X Maxx on a 351W with 4r70W issue.

hopp150

Jr. Member
Joined
Apr 26, 2008
Messages
69
Hi, so just installed the Terminator X Maxx on the 351W. The engine runs really well but I'm having problems with the transmission control. The trans is a1999 4R70W. First drive went well and initial shifted through all the gears. Then suddenly a neutral drop, Holley screen says trans is in 3rd but it's clearly dropping into neutral. I'm assuming this is a trans issue and not a controller issue??? It will go back into gear and then I have 1st and 2nd but no 3rd or OD. Anyone else experience anything like this? It's not consistent sometimes it drives just fine...
 
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