Ok and thanks in advance. I bought this 96 ranger 3 years ago with 123K on it, it now has 160K. When I first got it I swapped out the trans fluid ( which is ATF ) and put amsoil motor oil in there and it shifted SO SMOOTH. I loved shifting it. Well soon after that I had to put a new clutch. Well when the shop put the new clutch in they changed out the fluid again and put ATF back in. Well I left it in there for a long time. It shifted good after the new clutch but never did shift as smooth as when I had the old clutch and the Amsoil motor oil 5W30 ( which is almost the same viscosity as thick ATF ). Well now 3 yrs later it is not going into 1rst smoothly. Sometime it wont go in at all. Sometimes I will have to turn the car off and put it into 1rst and then restart the car. Its only been that bad a couple times. It will always go smoothly into 1rst if im at a SLOW rolling stop. It shifts fine other than that. No problem going into reverse. However sometimes it just wont go into any gear at all. And sometimes when it does that It will just take a little momentum and then it will go into gear. Sometimes if I just move the gear shift around it will go into gear more smoothly. This does not happen when the truck is just started and is cold. I talked to one mechanic and he said it could be just air in the hydraulics or it could be a bearing in the transmission itself. What do you guys think? Has this happened to you guys? Thanks for any help. Oh I have since tried the amsoil MTF and it helped but not very much.