You may need fuel filters too. My SD got to the point where it wouldn't go over 40mph on the interstate. I didn't know better or would have changed the filters. Instead I tried to rent a flat bed to tow with the cummins Ram that I'd bought on the same trip. No flat beds available and no internet. Ended up driving onto a tow dolly and dropping the drive shaft in 100* temps.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.