Sage222 Posted August 12, 2011 Share Posted August 12, 2011 (edited) So i seem to have a wierd issue with my m35.. just doesnt feel right under accelaration and numerous times the speed is going up though the revs are not.. (yes i know slipping is the other way round!) i must admit i am new to automatic gearboxes and this is the first i have ever owned and i might be simple paranoid though at approx 2800rpm and above some wierd shit is going on... car pulls great up to then..though once it hits approx 2800rpm then the engine noise changes to what sounds like air blowing (yes thats very vague) and despite is still accelarates it doesnt accelarate well like it should.. just checked the transmission oil and its running way too much (about 1 cm above the full line when hot).. the oil itself doesnt look too old though it is not the red stuff i was expecting.. so how hard is to change the gearbox oil and filter? i have read Nulon or Matic S is the way to go.. how much work am i looking at and where do i get a filter? (350z is the same i presume?) once again appreicate all your help. Edited August 12, 2011 by Sage222 Link to comment https://www.sau.com.au/forums/topic/373785-suspecting-gearbox-problems/ Share on other sites More sharing options...
ironpaw Posted August 12, 2011 Share Posted August 12, 2011 I had a similar issue when my car was worked on by the gas conversion mob. It would rev up but then when it hits boost all I get is a crap load of hissing sound. Scott looked at it and found some pipe was loose. Can't remember which one... Link to comment https://www.sau.com.au/forums/topic/373785-suspecting-gearbox-problems/#findComment-5962908 Share on other sites More sharing options...
Sage222 Posted August 12, 2011 Author Share Posted August 12, 2011 ooo that sounds very a lot more inexpensive than a gearbox! Scott please tell me you remember which one! Link to comment https://www.sau.com.au/forums/topic/373785-suspecting-gearbox-problems/#findComment-5962927 Share on other sites More sharing options...
scotty nm35 Posted August 12, 2011 Share Posted August 12, 2011 I cant remember yesterday. Have a look in your engine bay, but i'm thinking your'e just in 5th gear. lol. Link to comment https://www.sau.com.au/forums/topic/373785-suspecting-gearbox-problems/#findComment-5963009 Share on other sites More sharing options...
zei20l Posted August 12, 2011 Share Posted August 12, 2011 So i seem to have a wierd issue with my m35.. just doesnt feel right under accelaration and numerous times the speed is going up though the revs are not.. (yes i know slipping is the other way round!) i must admit i am new to automatic gearboxes and this is the first i have ever owned and i might be simple paranoid though at approx 2800rpm and above some wierd shit is going on... car pulls great up to then..though once it hits approx 2800rpm then the engine noise changes to what sounds like air blowing (yes thats very vague) and despite is still accelarates it doesnt accelarate well like it should.. just checked the transmission oil and its running way too much (about 1 cm above the full line when hot).. the oil itself doesnt look too old though it is not the red stuff i was expecting.. so how hard is to change the gearbox oil and filter? i have read Nulon or Matic S is the way to go.. how much work am i looking at and where do i get a filter? (350z is the same i presume?) once again appreicate all your help. no its matic J, DONT put matic S in it!!!! it will destroy your transmission. mine sometimes does that too, doesnt accellerate as hard as it should, i just kick it back a gear. its entirely possible youre not pushing the throttle enough to force the torque converter to unlock. Link to comment https://www.sau.com.au/forums/topic/373785-suspecting-gearbox-problems/#findComment-5963073 Share on other sites More sharing options...
ironpaw Posted August 12, 2011 Share Posted August 12, 2011 no its matic J, DONT put matic S in it!!!! it will destroy your transmission. mine sometimes does that too, doesnt accellerate as hard as it should, i just kick it back a gear. its entirely possible youre not pushing the throttle enough to force the torque converter to unlock. REally? Matic S will ruin the box? I thought S is better then J? Isn't it Matic D that's bad for the tranny? Link to comment https://www.sau.com.au/forums/topic/373785-suspecting-gearbox-problems/#findComment-5963129 Share on other sites More sharing options...
zei20l Posted August 12, 2011 Share Posted August 12, 2011 read the stick, it will tell you the nulon stuff is matic J and D or S or whatever it is compatible........... Link to comment https://www.sau.com.au/forums/topic/373785-suspecting-gearbox-problems/#findComment-5963146 Share on other sites More sharing options...
Sage222 Posted August 12, 2011 Author Share Posted August 12, 2011 (edited) nah its not 5th i have confirmed it happens in every gear by driving round in manual.. ironpaw sounds like he had the exact same issue.. come on scotty you must remember what pipe! its almost as the engine isnt seeing the boost.. Edited August 12, 2011 by Sage222 Link to comment https://www.sau.com.au/forums/topic/373785-suspecting-gearbox-problems/#findComment-5963160 Share on other sites More sharing options...
bigkevracer Posted August 12, 2011 Share Posted August 12, 2011 I dont think manual mode always actually displays the gear its in... Link to comment https://www.sau.com.au/forums/topic/373785-suspecting-gearbox-problems/#findComment-5963170 Share on other sites More sharing options...
Sunkist Posted August 12, 2011 Share Posted August 12, 2011 its probably a leak in the piping after your turbo. boost leak. check all of your IC piping... a loose clamp will do it Link to comment https://www.sau.com.au/forums/topic/373785-suspecting-gearbox-problems/#findComment-5963186 Share on other sites More sharing options...
Sage222 Posted August 12, 2011 Author Share Posted August 12, 2011 yes i know bigkev though it does hold the gear until you manually change up and i can count will have a look tomorrow at the core pipes i really hope its that easy! Link to comment https://www.sau.com.au/forums/topic/373785-suspecting-gearbox-problems/#findComment-5963203 Share on other sites More sharing options...
Sage222 Posted August 12, 2011 Author Share Posted August 12, 2011 nice one ironpaw! was intercooler piping much better now. thanks again! Link to comment https://www.sau.com.au/forums/topic/373785-suspecting-gearbox-problems/#findComment-5963910 Share on other sites More sharing options...
Sage222 Posted August 12, 2011 Author Share Posted August 12, 2011 anyone want to tell me about the gearbox filter and oil though? best way to take some oil out and how hard is it to change? Link to comment https://www.sau.com.au/forums/topic/373785-suspecting-gearbox-problems/#findComment-5964187 Share on other sites More sharing options...
Ross Posted August 13, 2011 Share Posted August 13, 2011 The box is suppose to be service free, unsure if there is a filter to change. The fluid is simple to change, just warm the car up, drain the box via the lower plug. Then drain the transcooler. Replace the same volume of fluid as you drew out of the box and cooler(around 4-5 L) via the transmission fluid inspection pipe located next to the fire wall. A full flush involves more work and uses a fair amount more fluid (8-10ish L?). There are youtube videos for G35s/350z that can be of some assistance if you get stuck. Link to comment https://www.sau.com.au/forums/topic/373785-suspecting-gearbox-problems/#findComment-5964332 Share on other sites More sharing options...
zei20l Posted August 13, 2011 Share Posted August 13, 2011 there is no filter, but there is a strainer in the valve body. its worth probably cleaning any metal bits out of that. but youll need to remove the pan. just remember to check the fluid level after you have filled it. go for a short drive and check it again after. Link to comment https://www.sau.com.au/forums/topic/373785-suspecting-gearbox-problems/#findComment-5964373 Share on other sites More sharing options...
Sage222 Posted August 13, 2011 Author Share Posted August 13, 2011 much appreciate the info ill give it a shot Link to comment https://www.sau.com.au/forums/topic/373785-suspecting-gearbox-problems/#findComment-5964602 Share on other sites More sharing options...
iamhe77 Posted August 13, 2011 Share Posted August 13, 2011 What colour is it if is isn't red??? What was used in it and whom did the service? I'd drop a little out of it (unhook one of the trans cooler hoses) and make sure it is on or just below the "FULL" line when hot. I know if you have too much or too little in there it can do what you are describing. no its matic J, DONT put matic S in it!!!! it will destroy your transmission. Nup, Matic S is the synthetic replacement for Matic J (which is a semi-synth) and will be fine for our transmissions. It's Matic D (or Dextron III) you can't put in there Link to comment https://www.sau.com.au/forums/topic/373785-suspecting-gearbox-problems/#findComment-5964722 Share on other sites More sharing options...
zei20l Posted August 13, 2011 Share Posted August 13, 2011 ahhh ok thanks dude, sorry for the misinformation. ill remember matic S when i change my transmission Link to comment https://www.sau.com.au/forums/topic/373785-suspecting-gearbox-problems/#findComment-5964978 Share on other sites More sharing options...
Sunkist Posted August 13, 2011 Share Posted August 13, 2011 What colour is it if is isn't red??? What was used in it and whom did the service? I'd drop a little out of it (unhook one of the trans cooler hoses) and make sure it is on or just below the "FULL" line when hot. I know if you have too much or too little in there it can do what you are describing. Nup, Matic S is the synthetic replacement for Matic J (which is a semi-synth) and will be fine for our transmissions. It's Matic D (or Dextron III) you can't put in there not going against what your saying, but ive been tod by ALOT of trans auto joints that its not bad to overfill by a little, and that a lot of trans joints actually overfill Link to comment https://www.sau.com.au/forums/topic/373785-suspecting-gearbox-problems/#findComment-5965230 Share on other sites More sharing options...
bigkevracer Posted August 14, 2011 Share Posted August 14, 2011 not going against what your saying, but ive been tod by ALOT of trans auto joints that its not bad to overfill by a little, and that a lot of trans joints actually overfill Isnt that when cold though? And just below the line when hot = just above the line cold? Link to comment https://www.sau.com.au/forums/topic/373785-suspecting-gearbox-problems/#findComment-5965280 Share on other sites More sharing options...
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