Help needed to decode 42RH trans number

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Headintheclouds

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Please can someone help me with any extra information on the origin of my 42RH?

The top rib has the number 4461106 E - 4
Then a sort of N and P combined in a circle.

On the right of this 2 Circles, one above the other. The top one has 90 in the inner circle, the bottom one 91.
09104 between the two circles.
 
Picture attached.

The serial is PK53009261 Date code 0939. As it is a 42RH I guess it must be between about 1988 and 1993 but I can't make any sense of this with the 10000 day formula.

IMG_5140.jpg
 
From the 1991 Dodge truck parts catalog.
PK 53009261 A500 with 5.2 engine , with electronic Torque Converter Lock-up used after March 6,1991. Found on Dodge pickup and vans.
Date code is July 10,1991.
 
From the 1991 Dodge truck parts catalog.
PK 53009261 A500 with 5.2 engine , with electronic Torque Converter Lock-up used after March 6,1991. Found on Dodge pickup and vans.
Date code is July 10,1991.
Any chance you can help me decode the 42Rh below?

Thanks for your help!

IMG_7559.jpeg
 
PK4505165 A500 with 5.2 Engine with Electronic Torque Converter Lock- Up Used in Vans and Pickups.
Date code is May 3,1990
 
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