1996 4l60-e tran. problem

[apunktr]

I have a 1996 4wd 4dr blazer with the automatic 4l60e transmission when i drive and it is in 1st gear (Drive) it stays in first ur driving and it just revs and revs the rpms it makes the tuck drive but it wont shift until u let off the gas then give it gas again and it seems like it shifts from 1st gear to 3rd then shifts fine into 4th but if u put the shift selector in 2 and drive it seems like its is just in 1st gear and wont shift out of it but if u down shift it manualy into 1st it acually downshifts the rpms go up and the truck slows down im so confused i dont know were to begin.

[dmbrisket 51]

start simple with fluid and filter change/flush

[apunktr]

i have changed the fluid and filter and it is at its proper level, im hopeing the problem is electrical i heard that it may be a ground for the computer not grounded but i dont know were, and is there a seperate computer or somthing for the transmission?

[dmbrisket 51]

do your anti lock breaks work?

[apunktr]

yes the anit lock work

[dmbrisket 51]

hmmm, yeah, i am stumpet, the other times ive heard about bad shifting have been either bad clutch pack (possible, its the internals to the transmission) or bad wheel speed sencors, if yoru abs is working the wss is ok, so i guess this is to be feilded by someone else, sorry i wasnt much of a help

[BlazerLT]

ok, go to your fuse panel and remove the two ECM fuses and the tranmission fuse and allow it to sit for a couple of hours.

This will reset the engine computer and the transmission computer.

It should fix the problem.

[apunktr]

i had the batery disconected for a few hours the other day is that any different than removing the fuses? and does anyone happen to know weree the transmission computer is? Thanks

[dmbrisket 51]

disconnecting the battery is the same thing as pulling the fuses, you lost connection and are forcing the computer ther "relearn" everything

[BlazerLT]

Originally Posted by apunktr

i had the batery disconected for a few hours the other day is that any different than removing the fuses? and does anyone happen to know weree the transmission computer is? Thanks

Keep the battery hooked up and remove the:

Two ECM Fuses
Transmission Fuse

Transmission computer is with the engine computer.

Let it sit for 30 minutes with the fuses out to clear everything.

[apunktr]

Ok, i pulled the fuses and that didnt work but what i noticed was it seemed like my rpm gauge was acting a little funny when i was letting of the gas and braking it would fall down to a between 500-1000rpms and bounce around a little but after i noticed it for the first time i dont think it did it again and the spedomter seemed like it moved weird but maybey its just in my head i dont think that is it idk and also when i down shift going around 45ish from 3rd(d) into 2 it just revs and dosnt do anything like i lost second gear and its in neutral but u can still downshift into 1st

[BlazerLT]

How long did you pull the fuses for?

[apunktr]

i pulled the fueses for 45 minutes

[Turbocpe]

apunktr, the problem does not seem to be with the memory in the computer. I don't know why you were told that "pulling the fuse should fix the problem".

By the way, what is the difference between removing the ECM fuses and removing the battery? That data is stored in the ECM's RAM, which needs constant voltage to retain that information.

I wish I could help, but transmissions aren't my strong point. I'd say you have more than a slight issue, when you apparently downshift into 2nd and have no engine braking. It is likely you're going to need transmission service by dropping the transmission pan, at the very least.

[BlazerLT]

Originally Posted by Turbocpe

apunktr, the problem does not seem to be with the memory in the computer. I don't know why you were told that "pulling the fuse should fix the problem".

By the way, what is the difference between removing the ECM fuses and removing the battery? That data is stored in the ECM's RAM, which needs constant voltage to retain that information.

I wish I could help, but transmissions aren't my strong point. I'd say you have more than a slight issue, when you apparently downshift into 2nd and have no engine braking. It is likely you're going to need transmission service by dropping the transmission pan, at the very least.

Please don't start saying other people's attempt to help is poor.

Seeing how Transmissions "aren't you strong point", how the hell can you question something that I did that cured a shifting problem just this week.

Resetting the computer is the first logical step seeing the transmission is computer and sensor controlled.

It worked for me and that is why I recommended it.

So from now on don't start tearing apart someone's advice when you have dick all help with yourself.