The e40d crossmember i have wont line up to the frame corectly with out modification, im trying to find one that will bolt in so i know the trans will be in the right spot when finnished. i have a 90 f-350 that has one in it and im planinng on pulling it out to find out if it will work but i need to put it back in so i can still drive the truck. i would think the 88 would be the same as the 90 i have so if it works ill let you know. i have also tryed a 95 2wd zf crossmember but its not the same & wont work. and its for a 94 f-350 im working on.