This weekend I had 20 minutes to try to get my jeep greased up and started to be put away for the season. I have a dual cardigan (sp) drive shaft on the rear and one of the two u joints but the transfer case would not accept grease. First I removed the little reverse nipples meant to accept a grease needle. I screwed in new zerks, but I could not get grease in.
So I went for a ride and got it warm, then tried, no luck.
I was thinking of a small propane torch to heat it up, but I fear melting the rubber seals.
My tractor u joints always take grease......
So what other tricks do you use to get grease into places that need it.