No over drive

[mack truck]

Hi folks i'am new here I drive a one ton dually but fuel prices down sized me. I have a 1996 olds cutlass with a 3.4 engine and a 4t60 e trans. runs and drives great it just doesn't go into overdrive. any ideas? The SES light is on with a 1870 code

[Rhedalert]

is it not going into overdrive (4th gear), or TCC lockup? If it's the latter, it's usually caused by a bad Pulsewidth modulated solenoid. If you go ahead and disconnect it, it may start working again. Let me know and I'll find some data to help you.

[mack truck]

It's not going into overdrive I can shift though the gears manually 1st though 3rd and feel the shift but when i hit 4th no change I can pull it back in to 3rd and no change. When i run around 60 she's just under 3 grand my sons runs under 2

[mack truck]

Where do i disconnect the solenoid i'll give it a try

[Rhedalert]

It's a black wire, I believe Pin E on the transmission connector (under the engine airbox) This site has a diagram showing this but I can't seem to find it. It sounds like it isn't your problem though, but maybe it's worth a shot. If you just pop the pin out of the connector, and it doesn't change anything, just slide it back in.

[TurboGTU]

Didn't those have a problem with the gear selector switch going bad? making not go into OD.

[2000impala-bo]

Help!!!I change the transmission filter on my 2000 impala and accidently nock a flat-spring type thing out. I don't know which way it goes back on. Can anyone tell me?

[Rhedalert]

Look on the right side of this photo:



If the pic doesn't work, click this link, and check the 5th photo down:

http://members.aol.com/regal231/xmission.htm

[Azrael]

Just got back from a roadtrip to Minneapolis. On the way back I had a similar issue pop up and the transmission wouldn't go into full lock at cruise speeds. Turned out I was just low on fluid after one of my BRAND NEW fluid cooler lines (OEM-style) decided to leak. Thankfully it was just a slow leak and all I needed was 2L over a few stops to get everything working right again. Not sure what to do with the other 6L I bought incase it wasn't a slow leak.

[pocket-rocket]

Save them for your next scheduled filter change :P

[TurboGTU]

IF its not electrical, 4th hub prob striped

[3400-95-Modified]

common issue...



74k miles on that one, and ready to strip with a little more power... needless to say I replaced it when I rebuilt the trans.

[94GPGTP]

did the fluid have a orangish tint to it when drained? if so bad torque converter... I have a E with that problem and just spent 1250 instead and got a E rebuilt.. didnt want to take out the converter to replace and later down the road have more problems..

[Azrael]

Looks like I'm still having OD problems. This morning the car struggled to get into overdrive and keep it. On the way back from work though it was working as it always had so I'm a little confused. Fluid is still full and hasn't leaked so all I can think is either a sticky TCC solenoid or there was some more air waiting to bleed out of the system.

[TurboGTU]

If it comes and goes then your in good luck still. Check or change out the gear selector switch on the trans. One way to test to see if its out of range is to shift it into OD and go up to 50mph. Then ever so slighly try to move it up or down without shifting it into Nutral or Drive. DID you run a scan of the car?