99 4g64 automatic help please!

[jackblack65]

My automatic seems to start in 2nd (no power) shifts once ,sometimes twice but wont hold it and eventually downshifts where it stays until I stop,then starts over.
I changed the filter and fluid and found no signs of damage there.

 

[Yamaharyder600]

Check out your tcu. It controls the drivetrain. It's located under the dash behind the engine ecu. I say to check the harness and maybe pop the case open to see how everything appears.

 

[jackblack65]

I read in another thread that there is an AT fuse that causes this issue in a 1G
Is there a fuse for the 2G as well? IF so where is it located?
I don't see it in the fuse box under the hood.
Do I have to remove the dash to get to the TCU for inspection?

 

[jackblack65]

Check out your tcu. It controls the drivetrain. It's located under the dash behind the engine ecu. I say to check the harness and maybe pop the case open to see how everything appears.

Ok I removed the tcu and it looks fine.
Something I did not like however is the fact that it is not waterproofed in any fashion.
It is just a bare pcb in a metal shell mounted below the windshield on the firewall seems ridiculous especially in a convertible!
I pulled the end clutch and looked at that,again it looks fine and No sediment in pan.
So just for the hell of it I fired it up with the tcu OUT of the vehicle and it drives the same way!
TCU toast or the tcu fuse seems the obvious suspect.
Now if I could just find the tcu fuse.
Anyone have a good TCU for sale?

 

[DSM1G90]

.they can be rebuit a lot cheaper than finding one to buy. Mitsubishi Eclipse Talon Laser Tracker Sidekick ECU ECM Computer Repair Service and Rebuilt Parts do repair on the units.

 

[DSM1G90]

Can't anyway - against forum rules, but members can PM you on such matters ...

 

[jackblack65]

I just bought one so I dont need one,it should be here in a few days.
However I was wrong about it running exactly the same as with it out of the car.
I notice that it actually wants to stay in 3rd and then drops to 2nd randomly.
When I had it in it wants to stay in 2nd and randomly shifts to 3rd.
I have sourced a solenoid pack but I need to find a TC just in case this all fails to fix it.
The tag on the firewall says f4a23 and I need to know if a TC from a 2000-2002
gallant or eclipse is the same.
I can find these Trannys with the TC cheaper than a new one specd for mine.
And I would like a backup tranny JIC.

 

[jackblack65]

Well I swapped out the old TCU and theres no difference.
I bought a valve body shift kit and found a TC so I guess I will have to pull the dam motor and transmission !!!!!

 

[jackblack65]

The shift kit came and just looks like a few springs,can someone give advice on installing them?
Being unable to post questions in the active areas really sucks.

Any advice on changing the TC out?
Special notes warnings or things to look for ect..????