Could be a bogus Pressure Control Solenoid (PCS), or possibly a bad 1st-2nd shift solenoid.

 

Ive got the same problem. I out some Bar's trans. cleaner stuff in it. It seemed to ease the slipping so far. Some bottle with red in one compartment and clear in another. For $8 I gave it a try. Been fine since.

 

Ive got the same problem. I out some Bar's trans. cleaner stuff in it. It seemed to ease the slipping so far. Some bottle with red in one compartment and clear in another. For $8 I gave it a try. Been fine since.

That stuff works pretty good. You can try adding LubeGard tranny additive also. I've used LubeGard on slippy trannys and is works awesome. Here's a link:
http://www.lubegard.com/automotive/index_trans.html

 

There is a manufacture defect in the 4L60E tranny in some years. The 97 was one of them, I have a 97 with the same problem. Take it to a tranny shop and ask them about the service bulliten and have a diagnostics done to verify the problem. They had problems with the valve body or the shift silinoid ground in the PCM

 

anything thats slips in the trans will trigger that code. the valve body has a flaw that allows the TCC solonoid to wibble. I had the code come up on me when i lost overdrive lockup and 1 to 2 shift was hard. To correct this it only costs about $30. If you have these symptoms all you have to do is change your TCC solonoid because they crack over time and do not hold pressure. You can change this valve just by dropping the pan. I do not recommend that you bring you truck to a trans shop cause its an easy way for them to talk you into getting a rebuild. You can do it yourself its easy. If you are looking at the valve body facing the front of the truck the tcc solonoid is located on the front left side of the valvebody.

 

i had that code thrown a while ago. checked my fluid and it was very dirty and almost gone. it went away after the tranny flush. that might fix it.

 

the problem is those damn midgets. They have been messing up everything for years! They keep getting away with it because they are under the radar. But I'm onto them, you hear me you little fockers!! I know what your doing!!

 

I have a 98 'noma 2.2 with auto trans. My overdrive lockup went away today on the highway, then about 10 minutes later it downshifted into third for no reason. I pulled over, turned it off and let it sit for a minute. Then I started it back up and it would shift all the way to drive, but still no lockup. Then the SES light came on. Had it checked, P1870. Then on the way home, it locked up just fine. Mine has always hit second pretty hard since I bought it with 35k on it (84k now). Is this the same kinda thing that osoosweetX is talking about, or does anyone have any other suggestions. Tranny fluid is full and still good.

 

Does anyone have the actual bulletin or more information on the fix for the p1870 code caused by the valve body design problem in 97 4l60e ?

 

does anyone have the part numbers for the valve body and source of supply. what about the valves too?

 

the valvebody defect i think is bullshit. Yea the TCC (torque converter clutch) solonoid will egg out the bore it sits in if this problem isnt fixed now. The TCC holds the pressure for the torque converter to lock up. I know from experiences that thes ****ers crack. When they crack the no longer hold that pressure. NO PRESSURE NO LOCKUP. You should get this problem fixed before you totally **** up the torque converter and maybe the cluches in the trans. TCC solonoid est.$35.....Trans Rebuild $1500-$1800...Dont learn the hard way

 

You can keep erasing this code over and over again Its always gonna come back and your problem will never fix itself

 

Sound good. I will replace the TCC. Can I get one of those at a local AutoZone or does that have to come from a dealer?

 

Where can I get a TCC Solenoid? Part Number???

 

Autozone will have it. It's like $40 I think... it's just a PITA to replace. The little wire harness is damn near impossible to get free.

 

anyone got a how to on this? my truck is throwing the same code and i needta have it fixed, wanna know how to fix this on my own before this thing kills me. also autozone printed this out

"transmission automatic 4-wheel drive indicator (lamp) circuit short to battery....transmission mechanical transfer case 4x4 switch circuit short to battery