Thread: Odd problem
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Old 03-06-2009, 05:30 PM
msega msega is offline
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Join Date: Dec 2008
Location: N. Texas
Posts: 58
Originally Posted by pmckechnie View Post
Is it possible the transmission is not shifting into 4th? Try the good 420 in 3rd gear at 60 mph and see what RPM it is at. To the best of my knowledge, all 420's have the same rearend, but yes, it could have been changed but why would anyone want to do that to such a fine car?
It does has a fourth gear. If it's in fourth and downshifted, the RPMs go up to about 3500.

Originally Posted by brownrestoratio View Post
Hey, just a thought hear maybe the lock up torque converter is not locking up.
How can you check it to see if it's not working right?
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