My 73 Duster is on it's third replacement idler arm in maybe 30,000 miles. The last one that failed was a moog problem solver which looked pretty robust but had gone completely loose at the centerlink pivot. loose enough that the linkage was hitting the header where it did not before. Current one installed over the week end is a TRW which surprisingly uses the same forging as the moog but does not have problem solver stamped on the cover plate. It too looks up to the task.
The car has...
Idler Arm Failure
