about 45 to 50 miles per hour
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1994 Cadillac Fleetwood Question: What causes shudder at torque converter lockup
Answer #1pushrod February 14, 2013, 18:24Master
Torque converter itself or engine misfire(s) that's more pronounced with converter locked. Light on?
Replymekimmcar, February 14, 2013, 18:30Rookie
No CEL after fully warm 30 min any heavy gas pedal and its there add on occasional not
Replypushrod, February 14, 2013, 18:39Master
GOOD tune up should do the trick!
Replymekimmcar, February 14, 2013, 18:44Rookie
New plugs & wires. it has slight hickup idling in gear at stop light and car tries to move with miss at times but goes smooth when put in neutral
Replypushrod, February 15, 2013, 09:32Master
When the car gets into the highest gear (converter locked) ANY engine misfire is amplfied and just might feel like a shudder.
Probably not felt in any lower gear. Scanner needed!!
Answer #2ziptie12 February 14, 2013, 21:05Master
If it's only when 'lock-up' occurs , try doing a trans fluid chang, using factory fluid. (NOT a flush) see if that helps the symptom.