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What is the correct interior door handle for a 1989 RW Superliner?

I got one of both, one on each door. These are the numbers on the back of the parts:

55QS23  Curved Handle

55QS23309A  Straight Handle

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Good question. I'm in the line to hear the answer.


Никогда не бывает слишком много грузовиков! leversole 11.2012

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Found out and it has to do with the year truck was made. 

55QS23 Curved handle was used up to 1979

55QS29309A Straight handle was used after 1979

Makes sense that the A designation is usually a revision for Mack

Both worked with the padded interior door panels with no rubbing. Extra clearance with the 55QS29309A  Found these online, New for $21 each with pins and Free shipping.

By the way there are two different window crank handles.

 

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7 hours ago, AZB755V8 said:

Found out and it has to do with the year truck was made. 

55QS23 Curved handle was used up to 1979

55QS29309A Straight handle was used after 1979

Makes sense that the A designation is usually a revision for Mack

Both worked with the padded interior door panels with no rubbing. Extra clearance with the 55QS29309A  Found these online, New for $21 each with pins and Free shipping.

By the way there are two different window crank handles.

 

"A" denotes an engineering improvement to the original 55QS29309 part number (no "A"). And so would a "B", "C" and so forth. But it has no relationship with the standard R/U/DM applicable 55QS23.

And when there is no "P" variation in the part number, it is considered to be a P1 (e.g. 55QS29309AP1).

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The window crank is the one I always remember rubbing holes in the door panel  

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