I have the lever shocks on my 47 3600. I used ATF in mine. I need to repair three of mine as they leak around the shaft. They work just fine for 78 years old. My truck rides very nice with them. I see no reason to replace them with tube shocks that won't stand the test of time like these lever shock. I replaced the RT front because it was seized and rusty inside. The other three just need new seals.
