Chevy Impala SS Forum banner

21 - 26 of 26 Posts

·
Super Moderator
Joined
·
8,836 Posts
Sorry I didn't see this earlier. For what that auction is selling, You might as well just get the 4L60E-HP-01 kit from Sonnax. It has all those parts and is better engineered. The boost valve alone is definitely worth the difference.
 

·
Registered
Joined
·
14 Posts
...

Finally, if you're putting a '95 or '96 transmission in a '94 vehicle, the '94 electrical system doesn't have provisions to control the PWM solenoid and so you will have no lockup at all if you leave it as-is.

1. Leave PWM solenoid INSTALLED - very important.

2. On the valve directly to the right of the PWM solenoid – push that valve all the way towards the outside of the valvebody. That is to the left in all the pictures here. I used a small pick on the spring to force the valve out.

3. Then, hold the valve in position and stake it into place on both sides. I've shown one side but both sides of the same valve should be staked to guarrantee it doesn't move under pressure.

That’ll lock down your PWM function and it’ll function like a regular lockup. No PCM reprogramming required.
Hi. I need some help here. I stumbled upon your information and realized I need to make this mod.

I have an LT1 engine and transmission out of a 1996 Impala SS installed in my 1983 El Camino Choo Choo SS.
But, I'm controlling it with an ECM out of a 1994 Firebird. I had Fuel Injection Specialties make a custom harness for me as I didn't get a harness with the engine or ECM.

I bought this engine/transmission new (factory takeout supposedly) in 1997 and installed it in the El Camino that same year. I've only driven it 20K miles since then. But it looks like those 20K miles have been driven with the torque converter not locking up according to your information. Almost all of those miles have been around town but I've taken 200 mile trips maybe 6 or 7 times.
I'm hoping I haven't damaged anything. However, the transmission still seems fine and has never set an 1870 code.
But, I did one of those 200 mile trips just last week and noticed for the first time that there was a slight odor of hot transmission fluid after pulling the car into the garage and shutting it down. I didn't notice this on the previous trips I took but maybe I didn't immediately put it in the garage like I did this time.

Now that I've found this thread, I'd like to make the necessary modification I need. You refer to pictures you've posted but I don't see any. Where can I get those?

Can I do this job by just removing the pan? Or, do I have to remove the valve body too?

Roger
 

·
Registered
Joined
·
1,071 Posts
Roger, most of those guys don't come on here much anymore....we've kind of moved over to facebook. But, we've got a really, really good 4l60e guy right here in town...JD over at Ernst Automotive on S Bell Street is really smart and won't mind helping. He's built several for me and a lot of the other racers in the area.
 

·
Registered
Joined
·
14 Posts
Roger, most of those guys don't come on here much anymore....we've kind of moved over to facebook. But, we've got a really, really good 4l60e guy right here in town...JD over at Ernst Automotive on S Bell Street is really smart and won't mind helping. He's built several for me and a lot of the other racers in the area.
Thanks. Good to know. I may need him on this.

I did get a PM from sherlock9c1 and he said if I got a kit from Sonnax and installed it, that would take care of my issue.

Pretty sure he was referring to the Performance Pack that they sell. I downloaded and studied the instructions but I'm not quite clear on it all. JD might help me there.

I'm also unclear about whether the Performance Pack can be installed with the transmission in the car. I think it can but not sure. In any case, I may not tackle this job until spring. I've got a lot of things on the table right now. At the very least it will need my full attention. The only thing I've done internally to an automatic is install a shift kit in a Turbo 350 and that's been about 40 years ago.
 

·
Super Moderator
Joined
·
8,836 Posts
You can do it in the car but getting access to the servo on the passenger side is tough with the factory B-body catalytic converter. There might be a part or two that require transmission removal and disassembly to install (the pump slide spring comes to mind), but they are not mandatory to install.
 

·
Registered
Joined
·
14 Posts
Well after a year and a couple of months of putting this off and barely driving the car at all, I just got this done and wanted to thank you. It worked great! My '96 tranny is now working perfectly with the '94 ECM.

I decided to do it with the transmission in the car. It worked out just fine. I pulled the valve body, put in the new Sonnax TCC valve and installed the plug in the separator plate. I decided to not use any of the other parts in the Sonnax Performance Pack kit except I did install the 8 plastic check balls it came with.

I did a complete flush of the fluid and I just test drove it and now I can feel it shift 4 times. So the TC is locking up now!
 
21 - 26 of 26 Posts
Top