I would like to firm up the shifts of the trans in my 99 4x4 Blazer. Does anyone know of a kit or some other trick to do this. It shifts fine and doesn`t slip now. It just would be nice if it had a little more of a performance feel. In the old days you could get valve body reprogrmming kit and do it in your driveway. I`m not familiar with the (newer) transmissions. I`m not really sure which one it is other than being a 4spd auto. Help!

 

here is what your looking for.
http://www.summitracing.com/parts/BMM-70360/

 

Get an actual shift kit and have it installed. Your transmission will be much happier.

 

I`ve installed shift kits in the past on TH-400`s in my Chevelle. So I`ll look into doing the same here. It probably hasn`t changed that much over the last few years.

 

Yeah thoses were the Good ole days with the TH-400. Those days have changed with the 4L60E. Alot of Electronics have went into this Transmission. Not So Simple as to just drop the pan and do a valve body reprogramming kit as in the TH-400 .Better do A little more Homework on this Subject. Good Luck T.J.

 

It isn't much different than what the TH400 was. Sure there is wiring, solenoids, etc, but once you get the wiring out of the way, the rest of the process is pretty much the same.

 

True,,, but a TH-400 Never needed a computer to control its shifts. That is what I was referring too as to the Electronics.

 

There are how-to's all over the internet and the instructions that most kits provide are done quite well. It isn't something a first timer should do without help though. Way too much that can be done wrong.

 

Thanks guys. I`ll do a little more research on this before I get into it. Like I mentioned before, I`ve done this a couple or so times before and I`ve never been one to jump in feet first without finding out what I`m getting into. I was just looking to see what might be the best option before I spend the time and money. I kind of like being cheap and wise at the same time whenever I can. But at the same time I don`t mind spending the money where its needed to do it right. Having to do something twice because tends to pee me off. Specialy when it costs more than I planned to spend. I`m sure most of you can relate to that.