The '82 harness definitely does not have provision for the OD Cancel switch or OD solenoid on the AT.GlenLloyd wrote: I was looking at the tranny section, do you have any idea off-hand what would be involved in adding the OD trans...electrically that is? I see that it has a disengage switch much like my dodge van. I wonder if that circuit is present in the 82 harness...my FSM for 82 has a very bad electrical layout and to be honest I haven't looked yet either. Also...is this the only item that you think would need to be added, since essentially it is just another 3 spd. auto?
I am definitely confused about the function of the switch. In one diagram it looks like it needs to be ON to allow OD function, in another it looks like it's ON to cancel OD. I've never figured it out. I have an OD console switch from an '83 gasser out in the back of the wagon, and I think it just says "OD". And there's a light in it.
Reading the 1983 Owners Manual (pg 42), it says:
That sure implies something, but I'm not sure what. Just because you push the OD switch to the "ON" position does not mean that it electrically provides power to the OD solenoid. I've run into that many times. In short, it's unclear to me the principle of operation, though I could draw you the circuit diagram in my sleep, it's not complex at all. I suppose I could go fetch the junkyard OD switch and do a continuity check of it to determine mode of operation, if you're really interested and if we need to know the answer definitively.The overdrive control switch is located on the center console. To turn on the overdrive control switch, push the switch in. The light will go on when the transmission is upshifted to overdrive. When the vehicle is accelerated by operating the "ACCEL" set switch of the cruise control, the transmission is shifted down to 3rd gear even when the overdrive control switch is turned on.
In any event, it would be very easy to add one wire to the OD Cancel solenoid and a switch somewhere, but it might not even be necessary, if it's a Cancel switch. Depending on your terrain, you might never need to manually cancel OD, and you could just wire the solenoid to switched 12v (if it's an enable solenoid, as in Ford A4LD OD, which I have in my daily driver and have had to extensively troubleshoot, including having to replace two driver transistors in my ECM!), or a disable solenoid (just leave it disconnected).
The larger problem is that I don't think that the OD trans can be backfit into the '82 and older chassis. I bought and own an '83 L4N71B from a gasser that I think will bolt up to the back of the LD28, but when I had my wagon up on a rack, I rolled the '83 AT under it, and took some measurements. The rear crossmember is in a different location but could be handled. The trans' overall length is quite close. But the back of the OD trans is fatter, and I don't think there's enough clearance in the trans tunnel.
There was, about four months ago, a fellow in Kansas who was quite rude in email, who was selling a "Nissan diesel AT" on eBay. Starting was $80 or so, quite reasonable, and I was all set to bid on it, the shipping was about $120 to me, but then I started asking him about details. I already have a gasser L4N71B; what I wanted was a real diesel version. I have the Nissan Parts Catalogue (as I know you do), and many parts are different part numbers, between the gasser and diesel versions. I'm pretty sure that the gasser version will bolt up, but will it shift right?
Anyway . . . when pressed, this eBayer insisted that he had had this L4N71B in an '82 Maxima. He also insisted that this was a "diesel" transmission, but couldn't cite its provenance and was rude when I pressed him on it. It didn't sell. I do not know if he knew what he was talking about, but I figure I'd better pass along the info, because you'll want to know both sides of this issue before you start.
If you pursue this angle (putting an L4N71B in your '82), I'll be quite interested to know how it fits. You pay shipping, I'll loan you my '83 gasser AT . Shipping that bugger wouldn't be cheap though, so I'm just kidding. I don't need that trans for a couple of years yet at the earliest, and I'm still really looking for a diesel version, but externally the gasser & diesel versions of the L4N71B are the same.
I just added a few lines about transmissions in the FAQ.