Hey guys im new to the forums I’ve tried looking all over the place for an answer but cant seem to find one i own a base 2007 350Z has around 124k on it and randomly 5th and 6th are gone its like i have two extra neutrals now while driving but when your completely stopped you can actually engage 5th and 6th without any problem its only when your driving that 5th and 6th seem to disappear i took it to a shop and they told me the trans is blown but they didn’t even look at the car and i have a feeling its not blown i dont know if anyone has any tips or advice they can give me before i buy a new trans and spend like $2500.

 

Sounds like its trashed to me. Nobody on the internet will be able to diagnose a car behind a keyboard

How long have you had the car, how many miles when you bought it, did you change the trans fluid after you bought it....in fact did you do any maintenance after you bought it?

 

Hey thanks for the fast response ive had the car for almost a year and when i got it it had 101k and id say after 1 or two days of owning it i did a full maintenance mt85 trans fluid,diff fluid,oil change,spark plugs etc. But yeah i get you no one can really tell me what it is through the screen i was just hoping someone has had this issue before and found a way to fix it worst case ill order a new trans from Z1 but i just wanted to make sure its not something dumb that i can fix instead of dropping 2k on a new trans.

 

If you have replaced fluid and it's doing it.....its gone sir

 

While you have Trans out, replace csc with the zspeed HD one

 

Another couple things to rule out internal damage... you say you can engage 5/6 stopped. Are they truly engaged? Put in 5th, let the clutch out generous (not floored) amount of throttle to ascertain if the gear is actually engaged. If the car moves, it's engaged, obviously.

If it is engaging, you might have an issue with shifter alignment under load which could be it just needs the alignment gate adjusted or possibly the trans mount is broken/loose allowing the trans/engine to torque over and not allowing the shifter to work properly because its binding when the trans moves.

Outside chance... but check these items before ordering a new trans.

If you do have to order a transmission, make sure you order the one for the HR engine, a JK41 trans:. And as Trav mentions, if you do have to swap (and assuming the trans doesn't come with it), install the ZSpeed HD CSC, not the OE unit.

 

yeah if trans ends up coming off ill end up doing clutch and csc just so i dont have to touch that for a while again.

 

yeah it engages for sure because if i put it in 5th or 6th while stopped and slowly let go of the clutch while giving it some gas it starts to move i was trying that to make sure it does engage and i ended up stalling it so for sure its engaging and it wasnt making any noise or nothing and i will definitely check the shifter alignment another thing is the shifter alignment the little plate under the shifter?or is there something else to look for when adjusting the alignment gate (im sorry i dont know too much about manual trans repair) and i will definitely check the trans mount and bushing to see if there is something that looks off because it threw me off that it engages while stopped but is non existent while actually driving I definitely would like to know how to do the whole alignment gate thing thank you for the response by the way.