Just bought 07 With ATS, went limp on drive home. Help a noob!

[launchpad]

Brought this over from another forum as a suggestion from one of your members.

Hi First post-

Flew to Denver from Seattle, bought a 07 Sierra with 57000 miles. ATS stage 6, 5 star torque converter and co pilot (trans has maybe 10,000 on it). I made it outside of Laramie and it overtemped (the trans) 40 miles west of Laramie and went into limp mode. It ran fine for 3 hours or so, started when I got into snow and ice. Not sure if that matters. I'm back in Seattle now, truck not with me...

These are the codes it has.

p0729 incorrect 6th gear ratio

p0757 shift solenoid 2 valve stuck on

p2761 torq conv clutch pressure control solenoid circuit

I curious what you guys think, I wouldn't wish the last 48 hours of my life on anyone. I'm not looking to bash anyone, or point fingers. Previous owner being helpful. Truck has been sitting a lot, only 200 miles or so in last 9 months, people seem to think that has to do with Valve body sticking. I like the truck, it's nothing crazy power wise, intake and exhaust is all. Just looking for some brain storming.

Any thoughts? Thanks-



update...

So the pan was dropped, found one sticky solenoid and freed it up. Put back together, now have forward gears and no reverse. Not codes or check engine lights....

They are still looking into it. Going to be looked at monday now I guess.

 

[McRat]

Change spin on and pan filter, but I wonder if you have a bad ATS converter. That sounds like what I saw when I had defective ATS converter.

 

[launchpad]

Has a 5 star converter, whatever that means.

 

[McRat]

When I had a 5-star ATS, at 250 miles suddenly the trans started to overheat. Then it limped. I had to baby it back home, the last few miles in 3rd gear. The ATS converter delaminated it's clutches. Factory defect. I wasn't the only one either.

 

[Mike L.]

Does it have a co pilot installed? If so reconnect original harness.

 

[launchpad]

It does have a co pilot, not sure if they tried that. I tried disconnecting it when it happened, but just re connected it. They aren't going to get to it until monday I guess now.

 

[McRat]

One of the problems with the CoPilot is that you can't just disconnect it. Nor does it have self diagnostics that will put it into bypass mode when something is wrong with it.

 

[launchpad]

yeah, all this is pretty new to me. I read in the co pilot instructions when I got home that if you just disconnect it, everything will go back to normal.

 

[McRat]

I know mine would not lock the converter when unplugged, which overheats the trans. Perhaps they changed the design? Dunno.

 

[launchpad]

yeah, I'm just trusting that they know more than me and are getting it taken care of. I'm kinda learning as I go.

Mine overheated on the highway going 70 for no apparent reason. When I pulled off, I tried a few things with that co pilot disconnecting and what not. Had one gear in forward, no reverse, then I had slipping in drive, reverse worked fine.

Up to now, he freed up a sticky solenoid and dumped replaced the fluid. CEL went away, forward gears work now with no reverse.

That's where it sits. Monday they are going to look into it more. Hoping it's done by Wednesday, that's when I can fly out and get it again.

 

[McRat]

I will admit I had a poor customer experience with ATS transmission parts.

The first CoPilot was DOA (apparently they did not test them after assembly back then, it never powered on right out of the box), the first converter failed at <200 miles with no racing (break in).

Then the clutch plates failed due to mfr defects the first day I took it to the track.

Obviously I don't shop there anymore. I now have 60k on one Mike L trans which is still going strong, and about 50k on the other truck, still fine. This is with hundreds of dragstrip passes. Didn't get 10 passes out of the ATS with only 475rwhp.

Hopefully you got a better one.

 

[launchpad]

Just a quik update, 6 weeks later... In short, one of the solenoids stuck and prevented oil from getting to the clutches and fried the whole thing. The sale of the truck was sorta pending on a working tranny, so the previous owner stepped up. It's my understanding that ATS covered the parts, and the prev owner got the labor (and the leg work since I don't live there)

Everything was replaced, I drove 12 hours in it yesterday and it worked perfect. Another 12 to seattle today and it should finally be sitting in my driveway.

After 22 hours with these nitto mudders, I'm not sure when my head ache will go away-

 

[madmatt]

kudos to the previous owner!! :thumb:

 

[DIESELMAFIAPER.LB7]

x2 sounds like a stand up guy! goodluck with the truck an go with the trail grapplers and ditch the mud grapplers!!!:thumb: