I have a 240z with automatic trans at first it wouldnt go into gear after i put trans oil it started grabbing gears but would only go into first 3up to like 50or60mph an won't go into last gear?anyone

Asked by 1971blk240z Nov 26, 2015 at 03:20 AM about the 1971 Datsun 240Z

Question type: Maintenance & Repair

Car was sitting for couple years got engine
rebuilt but not tranny an never flushed oil
just added tran oil?

7 Answers


You might drop the transmission pan and change filter and transmission fluid may help.

Best Answer Mark helpful

Most likely the seals have became brittle from setting, if you do change the fluid add a quart of TransX to it, this will help soften the seals and clean up the varnish, but you will eventually have to overhaul it. HTH

Best Answer Mark helpful

Thanks i was thinking about that i kinda figured all those years sitting n just adding oil. Ive been running it like that for about a year but cant get into freeway without that last gear.n now sometimes i have to gas it in gear n then it'll grab gear when its cold.

So seal could be stuck would that cause it to not catch the last gear


When seals get hard they leak pressure that is required for proper shifting, and if they are ran too long that way the sealing edges wear away so they will never work right again, I'm afraid that is what has happened in your case as you have been driving it that way far too long, if you do pull the tranny pan drain it off slowly and look for pieces of seal material and tiny metal flakes that will sparkle in the light, if you see those then it is too late, if you don't then go ahead and service it and put in the TransX, who knows how long it might last.

Thank you Youve been really helpful . I know before car was parked for couple years the tranny worked fine it was parked because we had seen water shooting through exhuast thinking it was a headgasket after couple years of sitting my son convinced me to give him my toy he didnt want a honda, toyota,or other lil reliable car he wanted the Z which was kool with me he had good taste in cars so i thought it would be a quick head gasket fix ended up rebuilting whole engine turned out the heads had hole n had frz.wanted to rebuilt trans but $ was issue so i took chances n now im here i hope ur advise works . Thnxs again.

As mentioned (TransX ) is the best ! I've seen it "save" many transmission problems. Read directions... Can even leave it in a bit longer than directed...but do flush after it does it's work.

Your Answer:


Looking for a Used 240Z in your area?

CarGurus has thousands of nationwide listings and the tools to find you a great deal.

Postal Code:


Datsun 240Z Experts

  • #1
    David Chambers
  • #2
    Kyler Barrett
  • #3
    G A Arne
View All

Find great deals from top-rated dealers


Related Models For Sale

Used Nissan Skyline
3 listings
Used Ford Mustang
39 Great Deals out of 1,074 listings starting at $6,890
Used Chevrolet Camaro
23 Great Deals out of 494 listings starting at $11,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.