Have a 2006 Monte Carlo, 3.5L around 135K miles, 4t65e transmission with issues. Drive band broke it's tab off so I did a minor rebuild on it. Replaced drive band and all clutch frictions. Steels looked good. Didn't disassemble drums or pistons, tranny was working well before the drive band issue. Didn't pull valve body off of channel plate, just kept those together. There weren't any shavings or metal in pan...just old clutch material and fluid. Replaced pan gasket and filter and put in a universal wiring harness (all the tabs broke on the old one). I've got it all back together, but there isn't any first gear. It starts in second, whether in D or manual shifting. Indicator in instrument panel won't light up the "1", but all other indicators are fine. It starts in second and has a good shift to third...maybe even TCC lock, but no fourth gear (fourth clutch hub splines are fine). RPMs running about 2500 at 65MPH. No check engine light either. Sensors and solenoids ohm'd out ok individually...haven't checked from trans plug though. I did have a CEL once for the input speed sensor. Reluctor wheel had slipped on first reassembly. It's replaced along with the thrust washer for it.

I'm kinda stumped at this point. I was thinking it was going in limp mode, but would it shift at all? Wouldn't it just stay in one gear? Any help is appreciated!

 

Hi! I don't have the answer to your question but welcome to the forum!!

 

Thanks P343. I've been a technician for quite a few years, and lurk in many forums from time to time ("someone's had this problem before"), but rarely post unless i run into strangeness like this. Hopefully someone really has had this issue too..

 

I've never heard of this one before.

My 06 Monte had the band break on 4th gear too at 200K. But I did a full rebuild at that point.

Sorry to hear, hope someone has an answer for you soon.

 

Just a bit more info. Drove it last night about 10 miles. No lights, starting in second and shifting to third. I seem to be getting TC lockup in third as letting off the gas raises the RPMs slightly. Shifting from D to 3 also raises RPMs the same. Stopped at a store. Went to restart and got a code P0700 after a quarter mile. Stopped again, turned off engine and restarted. Went to put in D and engine died. Did this a couple of times. Feels like TCC is locked up and killing motor, but, if I drop all the way to 1 it goes in gear. While parked i moved shifter to 2 and it killed motor again. Did this several times. Reverse engages fine. I cleared the code and could get into D without stalling.

I was thinking that the 1-2 3-4 solenoid wasn't responding as those are the ones I can't seem to get. But now this weird TCC locking thing has me miffed. Going to run ohms test on whole wiring harness since that was replaced. Has anyone heard of problems with universal replacement harnesses?