[Terrysch]

Richard,

Especially for critical rubber parts I personally recommend you use the best aftermarket parts that you find, and not use NOS. Over long periods of time rubber loses moisture, it dries out. This obviously varies by climate and each specific situation.
I am speaking as a mechanical engineering who worked for vehicle companies including John Deere. I did technical procurement including the rubber parts.

For my Jimmy I am HUGE on using the original OEM parts. I have purchased over 40 parts on the Forum in the last few months. Except for rubber parts. Plus another 40 plus original OEM on eBay.
I realize there will be some Forum members who will vehemently disagree with me. If members purchase and use original OEM parts that is their right.
Just recommend they understand the technical side and risk.

Terry