[jasonb69]

I have a 1999 S-10 ZR2. Recently my service engine light has been coming on, And..When it changes gears it hits VERY hard....and wont shift into overdrive. I was talking to a buddy and he said the same thing happened to him. He took it in and was told it was the valve body. Could this be a do it yourself fix? I havent messed with auto transmissions before, Never even changed the fluid in one. Is this a very big job to do myself??

Thanks