My 92 uk spec Turbo has lost 3rd and 4th Gears this week. Any bright ideas out there?

 

thanks in advance from the most disillusioned user of the site.

What do you mean lost it.

Is it an Auto?

Yes it's auto, and it disapeared overnight. Will not select 3rd or overdrive - everything else is perfect.

Does the Dim Dip still work ?

 

They maybe connected

THIS MIGHT HELP YOU:

Auto Transmission Diagnostic:

 

If you automatic transmission is acting erratically, may it be shifting too hard, shifting too late, shifting too early, etc. try the diagnostic to isolate the problem. The diagnostic, like the main computer diagnostic, may show an error code if it reads a sensor or circuit that is not within factory specs. If the problem is mechanical, the diagnostic won't show it. If it's electrical, then the diagnostic gives a general idea where to start looking to correct the performance.

Procedure:

 

1. Have the engine at normal operating temperature, in P with the overdrive switch on.

 

2. Start engine. The AT light should go out after 2 sec.

 

3. Turn the ignition off.

 

4. Move selector to drive D by using the Push Release button on the front of the stick, facing the dash, clock etc.. If not equipped, use the brake pedal

 

5. Set overdrive switch to OFF.

 

6. Wait 2 seconds and turn ignition switch ON.

 

7. Wait 2 seconds and move selector to 2.

 

8. Set overdrive switch to ON.

 

9. Move selector to 1.

 

10. Set overdrive switch to OFF.

 

11. Depress accelerator pedal fully and release it.

 

12. The codes will begin to flash. There’s one long flash that signifies the start of the sequence. Following should be 10 short flashes. Then it repeats.

1.

2.

 

 

 

Error Codes:

 

All 10 flashes the same = No error codes detected.

1st flash longer than others = Revolution sensor is shorted or disconnected.

2nd flash longer than others = Speed sensor circuit is shorted or disconnected.

3rd flash longer than others = Throttle sensor circuit is shorted or disconnected.

4th flash longer than others = Shift solenoid "A" circuit is shorted or disconnected

5th flash longer than others = Shift solenoid "B" circuit is shorted or disconnected

6th flash longer than others = Overrun clutch solenoid circuit is shorted or disconnected

7th flash longer than others = Lock-up solenoid circuit is shorted or disconnected

8th flash longer than others = Fluid temperature sensor is disconnected or A/T control unit power source circuit is damaged.

9th flash longer than others = Engine revolution signal circuit is shorted or disconnected

10th flash longer than others = Line pressure solenoid circuit is shorted or disconnected

All the same with no long start flash = Battery low, been disconnected, or control unit has just been reconnected.

 

 

They are not to be trusted, it is most likely mechanical and very expensive.

Thanks SI B. But that was my fist port of call. I've also worked my way through the workshop manual without success. I am however a little dubious about the reliability of the self diagnostics (at least on my vehicle) as when I have disconnected parts to check them out - they ahven't seen the change...

 

But once again thanks for the thought

 

Anytime at all mate!

I made a post under your sale ad .....You should re-consider selling it until its repaired m8!.....if only for the finantial aspect!.....if not then 15 mins driving a fully working ZX will make you glad you spent to get it repaired!

BTW i read that has an earlier Gearbox problem, which ended in a rusted plug!!!......seems a little to ironic that u fixed that and this occurs soon after...re check your work mate...

2nd place I looked. I've been checking peoples work all weekend - I had the engine repaired last week too. On consideration though I'm thinking clutch pack or clutch pack solenoid neither of which I want to get involved in.

 

Again thanx.