ECU tune Transmission control unit? - Page 12

longassname · #**166** 10-08-2010, 01:55 PM

The change to the 3rd and 4th gear line pressure maps I made in the ECUtune performance TCU will tighten up the previously sloppy around town 2 to 3 shift of a stock SVX but the main goal and effect of the changes to the pressure maps is to prevent transmisison failure.

The TCU is already making close to maximum available line pressure available at full throttle. If you want to make your full throttle shifts snappy by far the most effical modification to make is to rework the valve body to increase the maximum attainable pressure.

svxfiles · #**167** 10-08-2010, 02:26 PM

Quote:

Originally Posted by Huskymaniac

OK, you (sort of) tried to hide this:

"as well as using the lower gears better"

I have the TCU in my almost stock 93, Christine.
Not ECUTunes new version, the first one.

The best thing about it to me is that it keeps Christine in first and second longer, so that She "winds out" more.

One of the things stock SVXi do is to "short shift"!

Ten feet into an intersection, and its shifting into second!

The TCU allows it to shift later, so the engine/transmission makes better use of the available power.

1986nate · #**168** 10-08-2010, 09:10 PM

Quote:

Originally Posted by svxfiles

I have the TCU in my almost stock 93, Christine.
Not ECUTunes new version, the first one.

The best thing about it to me is that it keeps Christine in first and second longer, so that She "winds out" more.

One of the things stock SVXi do is to "short shift"!

Ten feet into an intersection, and its shifting into second!

The TCU allows it to shift later, so the engine/transmission makes better use of the available power.

I have driven Christine. I like her a lot

It holds 1st much longer-normal to what most other cars do, and also downshifts back into 1st at higher speeds when breaking instead of basically having to be at a dead stop for it to finally shift all they way back down to 1st.

This improvement is a great addition and would consider it very worthwhile.

Sean486 · #**169** 10-09-2010, 05:41 AM

Quote:

Originally Posted by longassname

Yes the upgrade chips are available on the website: http://www.ecutune.com/tcu.htm

Oh okay -I get it, I just need to buy the chip. Thanks

svxfiles · #**170** 10-09-2010, 07:52 AM

Quote:

Originally Posted by Sean486

Oh okay -I get it, I just need to buy the chip. Thanks

Sean, you already have the upgraded TCU?

Sean486 · #**171** 10-09-2010, 08:32 AM

Quote:

Originally Posted by svxfiles

Sean, you already have the upgraded TCU?

Yes

, I'll probably be getting the upgrade too as soon as I have some extra money. However I am not looking forward to taking the TCU out yet again.

Huskymaniac · #**172** 10-09-2010, 09:52 AM

Quote:

Originally Posted by Sean486

Yes

, I'll probably be getting the upgrade too as soon as I have some extra money. However I am not looking forward to taking the TCU out yet again.

How difficult is it to take it out?

svxfiles · #**173** 10-09-2010, 11:10 AM

Quote:

Originally Posted by Huskymaniac

How difficult is it to take it out?

If you are 4' tall and weigh 75#s, like hanging upside down, its a piece of cake.

Actually with a 10mm ratcheting box wrench, a light stapled to your forehead, its ok.

Huskymaniac · #**174** 10-09-2010, 11:57 AM

Quote:

Originally Posted by svxfiles

If you are 4' tall and weigh 75#s, like hanging upside down, its a piece of cake.

Actually with a 10mm ratcheting box wrench, a light stapled to your forehead, its ok.

I have one of those nerd lights that slips onto your head like a poker cap. I also have the ratcheting box wrench. After I get the master switch installed in my driver's door and the reading light installed in the Tribeca, this will be my next project.

Mike,

Do you have a 1996 TCU to modify or would you need one to work with?

1986nate · #**175** 10-09-2010, 04:27 PM

Mike, have you ever looked at a 97 TCU?
I drove a 97 for the first time and although I didn't notice if the 1-2 shift was different, the car definitely held 3rd gear a lot longer than what they do on stock earlier models under light to no throttle. The 97 would hold it above 35mph whereas all of my others shift into 4th at around 27-30 mph under the same amount of throttle.

(and yes, i did post something similar in a different thread but I thought it would apply here as well.)

-Nate

svxfiles · #**176** 10-09-2010, 04:45 PM

Quote:

Originally Posted by Huskymaniac

I have one of those nerd lights that slips onto your head like a poker cap. I also have the ratcheting box wrench. After I get the master switch installed in my driver's door and the reading light installed in the Tribeca, this will be my next project.

Mike,

Do you have a 1996 TCU to modify or would you need one to work with?

Remove all five screws before you try to remove the panel.

longassname · #**177** 10-11-2010, 01:37 PM

I have not. There are apparantly 2 different 97 TCUs. I have one of them but I have not downloaded the firmware off it as it's pinout is different enough I can't throw it in my car to communicate with it and I haven't had time to make up a harness to do it on the bench.

Quote:

Originally Posted by 1986nate

Mike, have you ever looked at a 97 TCU?
I drove a 97 for the first time and although I didn't notice if the 1-2 shift was different, the car definitely held 3rd gear a lot longer than what they do on stock earlier models under light to no throttle. The 97 would hold it above 35mph whereas all of my others shift into 4th at around 27-30 mph under the same amount of throttle.

(and yes, i did post something similar in a different thread but I thought it would apply here as well.)

-Nate

longassname · #**178** 01-01-2011, 08:13 PM

I leave the top two nuts just started on and tighten the bottom nut by hand so I can take mine out and put it in without tools. It's not like it's going anywhere. It's a lot easier to get in and out when you don't have to mess with the top nuts.

Quote:

Originally Posted by svxfiles

If you are 4' tall and weigh 75#s, like hanging upside down, its a piece of cake.

Actually with a 10mm ratcheting box wrench, a light stapled to your forehead, its ok.

svxfiles · #**179** 01-08-2011, 10:57 AM

There has been some confusion about LAN's TCU and valve body upgrades so I donned a lab coat and have tried to explain it as clearly as I can.
http://www.youtube.com/watch?v=Ac7G7...eature=related
You are welcome.

oab_au · #**180** 01-09-2011, 04:43 PM

Quote:

Originally Posted by svxfiles

There has been some confusion about LAN's TCU and valve body upgrades so I donned a lab coat and have tried to explain it as clearly as I can.
http://www.youtube.com/watch?v=Ac7G7...eature=related
You are welcome.

Oh come on Tom,

Every one knows thats not you.

Thats Trevor.
Harvey.