Hi guys, I've got the 1205.

Bad tranny selenoid or sumthin.

I dunno exactly what's wrong, but I was wondering if any body else had the same problem.

Those of you who rebuilt your auto trannys, did you experence this before tranny failure?


I just really need to know if this is a quick fix or a major haul over.

 

the solenoid is a relatively quick fix. Basically involves dropping the transmission oil pan, dropping the valvebody and replacing the solenoid there - a few hours work for the inexperienced. You just have to be VERY careful as to what you do/don't remove in terms of bolts.

 

First of all - Is your tranny shifting hard from 1st to 2nd ? and when engaging in gear from Park to D there is loud thump? , Is your overdrive light flashing when starting the car ? - Did you do the Drop Resistor Mod on your car?

If yes - than check your swich/wires/etc to make sure that dropping resistor is still in the circuit. If you didn't do the aftermentioned mod - then go straight to your resistor and check the resistance across the terminals - it should be around 12 ohms - if its not - replace the dropping resistor - (Dealer only , $60 part)

Now -if you test the resistor and it turns out fine, then you might have a problem with your shift and line pressure solenoids inside your transmission
Double check the code , to make sure you have the right one , than go to dealership again and ask for updated version of shift solenoids - Nissan had TSB on those - the part cost $140 - DON'T LET THEM sell you the old one for around $400 !!!!!! They've tried that on me !!!!

Replacing the shift solenoids is not hard at all , there are very good instructions with pics around the org. It does require to drop the tranny oil pan and remove valve body - but with patience and some comon sense everybody could do that.

I've had the same problem - 1205/flashing overdrive/hard shifts - took it to dealer to confirm my diagnostics and those bastards wanted to repalce my shift solenoids for $750 !!!! I've told them to pack sand, and i did it myself ,
but replacing solenoids did not resolve the problem.

I've had bad dropping resistor - a mere $60 part wich can be changed in 2 minutes. The resitor is part of the circuit, and if it goes bad - the ECU will throw 1205 code and misslead you into problem with line pressure solenoids.

now my original auto tranny with 140k shifts crisp and smooth.

Good luck , keep us updated

Nick.

 

Where is the Drop Resistor located? I am having a similar problem too?

 

i had same problem....i bout a used one from TOMS4N.com