Hello everyone, first time poster, long time reader.. I love your guys stuff here..
I own a 98 Blazer LT, 4wd

Anyways, I've got a strange issue and I'm not sure what it is.

Whenever I accelerate from a stop only, around 2500-3000rpms, my Blazer starts to buck or jerk when it accelerates. I've been thinking this is a transmission issue, but I'm not sure anymore. It doesn't seem like its slipping, this bucking doesn't happen around a shift point.

I'm not sure I can say its a fuel/air issue either though, because its entirely fine at high speed/acceleration past 25mph. I've gone through a list of thoughts, MAF, Throttle Position Sensor, just not sure where I should look first.

Thanks!

 

I recorded a video to give an idea of what I'm talking about. It's not doing it as bad as it was, but at about 4 seconds the RPMs drop back down real quick, and the car jerks.. It happens again later in the video as well..

Car jerks when accelerating quickly - YouTube

 

if this happens to get worse as the car heats up, check your wires and ignition coil at night to check for arcing. mine had a similar problem as yours start there.

 

New plugs/wires a few months ago, haven't had a look at the coil yet though, and I know the car has had some electrical problems in the past.. will check tonight, thanks!

 

mine does something similar i think my trans fluid levels arent right

 

I'm thinking now more than ever that its just simply the trans going out. I think I'm going to get with a friend who has a tool to be able to scan it to make sure before I shell out the $. Thankfully he'll rebuild it for a fair price, can't complain, it's worth it.. thanks for the help again

 

check mounts... same happened here and mech is changin mounts... i looked under hood while doing a power brake and watched the engine jump around