Those who change oil in manual tranny, BEWARE!
#1
Those who change oil in manual tranny, BEWARE!
SHORTLY: Be careful not to flush off the reverse position switch when you drain oil by the means of unpluging reverse position sensor down on the tranny, or you will loose your back up lights!
STORY:
Probably you guys know about it, however when I ran into this problem noone on org had a clue and only one !!!! person at all replied to my thread. When I was fixing my clutch 2 weeks ago and drained oil from tranny by unplugging reverse position sensor, the reverse position switch got flushed off obviously. I lost my back up lights and had no clue why. Checked fuses, leds and wires, then sensor for resistance and it behaved suspiciously, so I got new one at Nissan dealer. Together with it I got the switch, use for which I did not know and tech guy at Nissan dealer had no clue either!! After researching on Internet and asking people around I figured it gotta go behind the sensor, so I drained oil again today, unplugged the sensor, looked inside and yes, there it goes! Back up lights work again!
This is how it looks like:
STORY:
Probably you guys know about it, however when I ran into this problem noone on org had a clue and only one !!!! person at all replied to my thread. When I was fixing my clutch 2 weeks ago and drained oil from tranny by unplugging reverse position sensor, the reverse position switch got flushed off obviously. I lost my back up lights and had no clue why. Checked fuses, leds and wires, then sensor for resistance and it behaved suspiciously, so I got new one at Nissan dealer. Together with it I got the switch, use for which I did not know and tech guy at Nissan dealer had no clue either!! After researching on Internet and asking people around I figured it gotta go behind the sensor, so I drained oil again today, unplugged the sensor, looked inside and yes, there it goes! Back up lights work again!
This is how it looks like:
![](http://images.cardomain.com/member_images/11/web/443000-443999/443899_63_full.jpg)
#3
It sits right behind the plug on a metal rod which moves when you shift. Hence switch moves as well and touches sensor's contacts in different way, letting it know the position of shifter and when it is in reverse and when not.
#9
The drain bolt in manual trannies can be accessed only with a flat wrench, which sometimes does not provide enough grip and bolt gets rounded. For that reason it is a common practice to drain oil by unplugging reverse position sensor instead.
#10
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Originally Posted by Vlad
The drain bolt in manual trannies can be accessed only with a flat wrench, which sometimes does not provide enough grip and bolt gets rounded. For that reason it is a common practice to drain oil by unplugging reverse position sensor instead.
I guess this doesn't apply because the big drain bolt on my max is perfect and I am able to unscrew it no problem each and every time. Although I will admit that unscrewing the sucker calls for an exceedingly precise wrench, which I have
![GrinNo](https://maxima.org/forums/images/smilies/grin_no.gif)
#12
Originally Posted by Vlad
The drain bolt in manual trannies can be accessed only with a flat wrench, which sometimes does not provide enough grip and bolt gets rounded. For that reason it is a common practice to drain oil by unplugging reverse position sensor instead.
#13
Originally Posted by Supa Lao
hmmm....I changed my tranny fluid on my car last fall. I think I used a 1/2" ratchet to turn the bolt.
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