i have a 85 300zx non turbo, when put into low gear it goes into low and reverse, the same with park, it feels like it's in reverse and park. when in drive car starts out in drive gear not first. but when driving highway speeds it will go in and out of overdrive, any answers??????

 

tranny problems

 

Your post is pretty hard to understand... but welcome to ZDriver! Have you checked the ATF level?

 

after you check the level...change the fluid,the filter plugs easily on the 4n71b trans.. DO NOT FLUSH THE TRANSMISSION!!... this will lead to certain death of the trans

 

Sounds like you might have some slop in the linkage too. Also, please use better punctuation. It'd make what you're trying to say a little easier to understand.

 

I did a filter and oil change, can you think of anything else?

 

Do you mean ENGINE oil and filter, or TRANSMISSION fluid (ATF) and filter?

 

Dur, aren't they the same thing?

 

transmission filter and oil

 

Ah... not to get technical, but we call transmission oil "fluid" as it's quite different than engine oil. Did you use ATF (red auto trans fluid) ?

 

yes I did, I have a 78 280 that I did a frame off restoration myself. I'm not a automatic tranny guy,anything else but autos

 

When you do a total fluid change, especially in a high mileage automatic transmission, the detergents will clean off all of the build up that is needed to hold that puppy together. Once all the gunk gets cleaned off from these detergents, things start to go south fast. There is also a temperature sensor that will not allow the car to go into overdrive until the transmission has warmed up. They get quirky from time to time too.

 

What is wrong with "flushing" the tranny, instead of just draining the fluid and putting new in? The flush takes the fluid out of the tourqe converter as well as whats just setting in the tranny.

 

I guess you missed that last post by RocknTommy.

 

z31 autos were not known for their reliability. the tranny in my '87 auto went to hell at about 185k. how many miles are on your car? it might just be time for a new transmission.

 

yeah, 85T auto tranny's also dont like 7300 RPMS neutral drops either.. who woulda' thought?

 

does any one have a 85 300zx automatic tranny for sale.?????