Speed Sensor Issue?

[dodes47]

So not so long ago, i posted a thread about my gt-8's transmission going bad..at least i thought it was the tranny..

The problem went away after an ecu reset and a pedal position relearn.

http://www.skylinesaustralia.com/forums/We...-8+transmission

Just last night the same thing happened again. I was cruising down the freeway doing 100km/h then the it felt like the car's power is cutting out jerking forward and back.

Pulled over, did an ecu reset and off i went again with no problems whatsoever after that.

One thing i noticed though is that whenever i release the accelerator pedal and put the tranny on manual mode, the car would always jump to the third gear. It doesn't matter whether i'm doing 100 or 60 km/h. But if i keep my foot on the pedal when i change the mode it goes to the appropriate gear according to the speed the car's doing.

I've got a feeling that's it's a sensor issue. It's as if the tranny doesn't know how much speed the car is doing when you let go of the accelerator. But which sensor needs checking? How much would they cost to repair?

[fcruz3r]

power cutting out doesn't sound like a transmission problem...hv u taken ur car to nissan to get a diagnostic check for possible fault codes?

i always wait till i get to a complete stop ( at traffic lights) before switching between auto and manual mode...i thought everyone did the same....apparently not ...lol

Edited August 4, 2010 by fcruz3r

[pv35gt8]

Haven't really taken any notice about the gaer when i switch to man mode, but I have heard that the five speed box will always go to third, I have 2 mates with M35 stag's and they both go straight to third.

As for changing when stopped it doesn't pose any probs for the box, I would assume that Nissan would have plastered stickers all over and there would have been a note in the manual.

[dodes47]

Yeah, i usually change the mode whenever i feel like it. And i've always noticed the gearbox go to the right gear according to my speed. This time it didn't when i let go of the accelerator.

If there is a fault code logged in the ecu wouldn't the check engine light turn on? Man i really need to get my hands on a BlaztII cable.