Ok, I need a new transmission and I need to know which ones will bolt up to my engine/transfer case without an adapter. Can anyone help me on this subject. Its a buick 225 v6 with a dana 18. I had a th400 (before it went out) and I was thinking I would like to convert to a manual transmission. I like the low gear of a 4 speed but I was also thinking it would be nice to have that extra 5th speed for highway mileage. Is there any 5 speed transmission with a granny first gear that would bolt up or will it take an adapter. Also what 4 speed could I put in. Any help would be great because my jeep is sitting idle until I can get it fixed. I cant wait to drive it again and I dont exactly know what to do.