Inside the front storage where the jacks are mounted on to top of each end is a plastic cap where the gears are. Make sure they are full of grease( wheel bearing grease is fine). Plus I drilled a small hole in the side of the square tubing the acme thread shaft is housed. Just big enough to get my squirt oil can in. I raised the front up till the inner square tubing is out of the way and the acme shaft is visible. Then I take synthetic gear oil and put the can against the shaft and put about 20 squirts one each shaft. After a while it will leak down and on the inner square tubing outside. I wipe the excess off. That is the only way I have found to lube the shaft. Since I cannot get the trailer high enough to work from the bottom up outside.