Will a trans out of a 2002 with a v8 motor.Will the trans bolt up to a 1998 4.0 motor.

in order to answer that question you need to first provide motor details of recepient engine block and part number of donor transmission. like a 4r100 transmission has a bell housing that will only pair up to ____BLANK____ motors need more details here buddy

for instance a 98 laredo with automatic transmission is a a500 42re transmission this transmission was used in 1993-1998 grand cherokees in 2000-2004 same model but different transmission control unit example https://www.quadratec.com/jeep_knowledgebase/article-94.htm

each of these have different length brackets connectors even if bell housing lined up u would need a custom drive shaft or it may not bolt up to your transfer case since this is 4wd transfer cases themselves are not universal np 242 fits 4.0s from 97-2001 you need to look at your transmission name plate and get the model number

https://upload.wikimedia.org/wikipedia/commons/thumb/7/70/2011-07-11_20.15.54.jpg/1200px-2011-07-11_20.15.54.jpg example of name plate sticker