my 1998 blazer 4.3 auto 4x4 shifts hard going from 1st gear to 2nd, this isnt all the time just sometimes, it lets the rpms get a little high then it shifts really hard,it chirps the tires sometimes, what could make this happen? i just got the blazer about 2days ago an im wanting to get it all fixed cause its going to be my family vehichle/light trail rider

 

My 95 4wd has a hard shift from 1-2 as well, but it doesnt chirp tires although it now does it basically all the time. I had it checked out yesterday and was told I need to replace my torque converter. And the part isnt all that expensive thank goodness.

 

thanks, im gonna get mine checked out as well but i have to wait until next week. i hope its something simple like that an not the whole tranny

 

If it were the tranny as a whole then u would be having symptoms in other gears as well most generally anyways. Good luck and let me know what ya find out Sure hope I helped ya though

 

I might be wrong but I believe there was a TSB on hard 1-2 shifts. I will have to do some digging when I get home lol.

 

What is TSB short for?

 

Probably a thread

 

Technical Service Bulletin

 

check the 1-2 shift solenoid it should have a resistance between 19 and 24 ohms cold around 68 degrees f and 24-31 hot up 200 d f so if its between 19 and 31 ohms of resistance its a good part if not replace them they are cheap. 1-2 and 2-3 solenoids are the same part number and i would replace them at the same time its real easy to do, drop the trans pan and you will see them right by the transfer case support there is a c clip that holds them in place grab it with a pear of needle nose pliers and pull straight down take car when removing the solenoid there are parts behind it springs ect.. re-install in the reverse order check and make sure the electrical connections are in good shape re-install pan add 6-8 quarts of trans fluid =test drive see a link on diagnosing shift solenoids 1-2 2-3 Part 2 -Shift Solenoid A and B Tests. P0700, P0751, P0753, P0756 (GM 4.3L, 5.0L, 5.7L) good luck

 

Have you checked your fluid level? How old is the fluid in the trans? It may just need serviced.