Ok. If you've read my intro thread then you know about my code p1247. I'm assuming the shake is related to the low power......... but when driving with overdrive on at 1,500rpms or lower, the truck will just about jar your teeth out. It's also a little rough on take off from a stop, in or out of OD. Would this be attributed to the lower power issue? According to a receipt I got with the truck, Aamco put a new 4r100 and a new transfer case in it in 2003, but it's only had 11,000 miles put on it since then due to being locked up in an estate. It drives fine at higher rpms/speeds. Any ideas?