Automatic Box Problem

[StreetFame33]

Hello,

I'm hoping someone on here could shed some light into what may be wrong with my automatic gearbox in a Nissan Skyline R33 GTST 1993 Model.

Firstly, I had an issue with the gearbox when 2nd/3rd gear had blown, so I had a second hand automatic gearbox fitted to the car. I had no issues with it for about 2-3 months ran fine every time. But sadly, I had an issue with the second gearbox where it didn't want to change into 2nd or 3rd gear I took it to 3 different automatic transmission places in Brisbane but no one really knew what the problem was as didn't happen every time it was hard for them to diagnose the problem.

One guy had suggested that it could be the plugs for the gearbox; he blew them out with a air gun. I noticed after that, the problem didn't happen as often. The plugs he blew out were the ones on the driver’s side in the engine bay, there are four of them (1 for the starter motor, one for the gearbox and a couple of others I'm not 100% sure about) anyhow, they are all together he cleaned them all out for me.

When I noticed that the problem didn't happen as often, I cleaned the plugs out with CRC Electrical Cleaner - for about 3-4 weeks I didn't have an issue, was great really thought I had found what the problem was. I might also add, the problem didn't happen every time and when it did I normally turned the car off and start it again and about 90 precent of the time it was fine, with no problems after that.

Anyhow, now the problem has been back for a while, and haven't had any luck in having this issue fixed as the CRC Electrical Cleaner didn't work this time.

When the problem does happen;

Start the car as normal, put it into reverse to get out of the driveway and you can feel a jerk in the car when this happens I know there’s going to be an issue, once out of the driveway and put it into drive the car jerks again a little bit more then when I put it into reverse though. Then, as I drive down the street it doesn't want to change to second gear, so I normally just turn the car off, start it again and most of the time it is fine to drive again.

Like I said before, it doesn't happen every time, but it’s starting to happen more and more often.

Thanks in advance to anyone that may have any suggestions etc. Only other thing I have been told it could be the solenoids.

Any help would be greatly appreciated.

Thankyou,

Aron

[SECURITY]

Go back to those plugs and crimp the wires down so they clamp onto the pin a bit harder. I used a small flat head screw driver to push them down.

Do the same for the two plugs on the TPS.

[blind_elk]

How old is the battery? Skylines aree notorious for being sensitive to voltages. Older batteries take more current to recharge after a cold start, and most of the ECUs view this as a problem, and misbehave accordingly.

[britz1]

Im having a simlar problem in when i stand on the accelerator it reacts normaly but when it changes to second gear the revs fall to 3k and wont accelerate any more.... could it be a form of limp mode...

also when it changes from 1st to second... before it cut the revs it would hit limiter for a second before it pulled second... not shure if this in normal...

Could someone help?