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Sorry DigEm355, did not see your post. Did you find a transmission that worked for you? Is your Colorado 4x4? I think any 4l60e from a v8 will work on the bell-housing side. If its 4x4, I don't know...

DigEm355 - Need more information on what you have and what you need.

Took truck for a drive today and now 3rd and 4th gear is gone. Had to put it in 2nd and drive 25 mph to get home.

Running.

Yes the dipstick looks like it should be reading right. But when you pull out dipstick it shows fluid 4 inches up the stick. I dropped pan and then put in 5 qt. After driving it I added another 1 1/2...

Ok, I finally changed the fluid and filter in the 4l60E. I still have the delay when going into gear. It does it both ways forward and reverse. The RPM's have to be 1250 for it to engage. Right now...

Sorry Xvaldexxx, I thought this was another thread i have. The P0741 in my case was the transmission valve body. The torque converter clutch solenoid and to be over sized to stop fluid from leaking...

I have not had the time to get back on this project. I do believe its a tuning problem now. I will need more details on what your ECM, TCM, OP's and year and a drive log too.

Everything seems to be working fine except every now and again i have the reverse delay. It acts like it is low on trans fluid. I have to give it a little gas for it to grab reverse.

I'm still working on this garkhul. I have been in contact with HPTuners it appears that turning off the ISS does nothing for changing the way the TCM\ECM calculates TCC slip. Now it did take my...

I have the transmission shifting and TCC locking up fine now. Its just when you log the TCC records a slip. The TCM or ECM which ever one that does the calculation seem to still be looking for the...

The transmission is locking up now. Transmission shop fixed the issue of it not holding lock. Problem is computer still thanks its slipping so it throws a p0741. I do have access to my log data as...

I understand that some T42 OS's work better than others with the 13 pin transmissions. I know on the OS I'm running now setting the ISS to disable seems to do nothing. It show the TCC slip RPM's...

Ok so if a different T42 operating system (OS) will fix my problem I'm all for it. But I'd like to be sure before I speed more money on another tune file. Plus I need to know which operating system...

So what can we do about that. I have the ISS turned off in tune.

Ok here is a drive log from today. Cold to 170 was as hot as I could get it. I also changed all the settings to the GTO tune file.But I did not update the whole T42 to the GTO because I did not want...

Crap i think I have to pay another $200 to just change the T42. Anyone know how to change it with out hp tuners.

Never mine they have the normal shift set to call for TCC for 3rd and 4th. All other patterns are set to not use tcc. So i will give them a try.

I found two in the tune repository but the TCC is set to not allow engage.

Shrek, I would try it if I had a 2006 GTO T42 file. lol

I did make a change in tune to not allow the TCC to engage in 3rd gear.

It will be a few days before I can put together more logs. I don't have the truck its at the shop. I cant get there today before I have to go to work so it would be Monday before I can make logs.

There is no ISS sensor in this transmission. This was a 06 Colorado 4x4 with a 5.3l engine swap. The transmission is from the Colorado it was rebuilt to fit behind the 5.3l. The ecm and tcm was...

Ok after two weeks the transmission shop just called they still cant figure out why the TCC slips at lockup. What are we missing here? They have put in 3 different torque converters updated TCC valve...

I don't know what happen or if this log shows anything, but I went to drive truck to the transmission shop and it only made it about a mile and it lost everything. No forward or reverse gears. Had to...