2ML70 Rebuild

[Knagawa350]

Hey all! I have an ‘09 Tahoe hybrid, the 2ML70 is slipping the 1-3 clutch and 4th clutch. Chevy is only offering to replace it for 6k and up to a year for the part. All the transmission shops in Portland told me kick rocks and I won’t find the parts. I got this truck a week and a half ago, and I’ll be damned if I just toss that money away. Currently have parts showing up tomorrow from Michigan overnight. SMC performance has OEM original in packaging surplus parts for the 2ML70. I got an inventory list from them, and dug through parts numbers with vague discriptions. However they did have the bulk of necessary parts I was able to verify through GM. The rest I will make sure to check and get a list running on what’s what, when I disassemble. Also (alldata) has a manual online I will be following for this procedure. I’ll post pics for everyone here on this thread, and try and spread any knowledge I have on this subject to those who want/need it.

 

[j91z28d1]

much appreciat the build thread.

I know you said you had a shop confirm the slipping, do you know what they looked for? used a scanner or just drove and felt it?

 

[Knagawa350]

Used a scanner and road test both at the Ron Tonkin Chevy dealership in Portland Oregon, code was: P709D? I can confirm and send a photo of the paperwork when I get home tomorrow morning

 

[j91z28d1]

ahh just looked, yep. P079D is 4th gear clutch slip.

incase you haven't seen it floating around. it's posted a few places. there's a good pdf that tells what conditions need to happen for most code to be set

 

[Knagawa350]

Awesome! I had not seen this yet, I appreciate it! All the parts will be in by 9pm, I get off work at midnight and I’ll be posting pictures of what they look like in the packaging.

 

[j91z28d1]

definitely looking forward to pics.. this tranny is like a Phantom on the net lol.

 

[Knagawa350]

Update: transmission is pulled and on the shop table, I had to leave for work so tear down and rebuild will be tomorrow along with install. The service manual is not ideal for steps to removing transmission, ie. front sway bar needed to be removed to remove the front drive propeller and some other finky little things of that sort.

 

[j91z28d1]

any luck?

 

[Knagawa350]

So caught a snag getting the first electric drive motor out, it takes a specialty tool that is around 1k, so looking into at home shop techniques ie. A chain and some s hooks attached to a motor jack.

 

[Knagawa350]

Also oddly enough the torque dampener (since it is jot a converter) is magnetically stuck on to the front by the 1st position drive motor.