Won't shift from 2nd to 3rd

[gdorris]

My 1982 Auto transmission Maxima diesel will shift from 1st to 2nd but not from 2nd to 3rd. It was about a quart low on tranny fluid but is topped up now. This is my first slushbox. 140,000 miles. Any ideas?
Gregg

[asavage]

Hello, Gregg:

Please read this thread for a start-to-finish on a rig that had that exact symptom, including the fix.

More related reading is in this thread in which a different problem caused a related problem.

Lastly, see [gotopost=

[asavage]

Hello, Gregg:

Please read this thread for a start-to-finish on a rig that had that exact symptom, including the fix.

More related reading is in this thread in which a different problem caused a related problem.

Lastly, see this post for some pictures of a third trouble area WRT shift points.

HTH

[gdorris]

Al,
Thanks for the leads. This is Terry's car, as a matter of fact - the one with the same problem in the first post. I will use the info tomorrow to fix it. BTW, did you get my earlier email to you?
Gregg

[asavage]

Your email to me must have gotten lost in the spam storm (I get ~120 spam emails/day). Please re-send it, and be sure to put "Datsun" in the Subject, or it could get deleted again.

I met you briefly at the 6th Annual Seattle BioDiesel Conference a couple of weeks ago. Sorry we didn't talk longer -- I was trying to stay focused on the panel discussions, and they had no breaks! I sat for six hours!

It's likely that one of those threads will give you the clue you need: vacuum leak somewhere.

[gdorris]

Al,
I found and patched the same hole in the vacuum line as in the photo - I guess the electrical tape must have fallen off! It shifts fine now.

The HVAC fan started working after I fixed the vacuum link. It seems to be electric, but could the fan actuator be vacuum connected? Or is it a coincidence?

I will spend some time in the car to see if I love it enough. If not I iwll be selling it.

Thanks for your help.
Gregg

[Carimbo]

While some portions of the HVAC system are vacuum controlled (the A/C idle RPM increase dashpot, for example), the interior fan is electrically controlled, and the heater valve and damper doors are controlled by levers and sleeved cables.