View Poll Results: What should I do
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LS 430 Transmission Failure & Replacement
Instructor
Joined: Oct 2010
Posts: 1,241
Likes: 55
From: CA
Dicer sorry to hear about the problems. Going after the electrical side sounds like a good direction. It's interesting that dealer went after possible electrical to start. How often do 430 transmissions suddenly fail mechanically? Were there any warning signs like hard shifting, slippage, leaks? If the parts company is willing to replace the computer, that seems like a good option. You've got the part. Get an estimate to install. If it works, dealer should be thinking about refund of labor costs.
Instructor
Joined: Oct 2010
Posts: 1,241
Likes: 55
From: CA
If the new or replacement transmission didn't work then, the problem most likely was not with the transmission but with something to do with the car or rather the electrics in the car. It could be a bad transmission controller or even just wiring or the shifter switches or what ever it is they use to translate the shift movement into gear selection. On the older stuff it was pretty easy manual shift valves and linkage, but newer stuff is mostly translated by a computer into correct solenoids to accomplish a fluid redirection in the valve body.
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