In Section 6-1 page 100 of the Assembly the two letter engine codes are listed for all (I thought) engine combinations. On that page there isn't one instance where an MT engine has A/C (even the L6). Was it true that you couldn't get A/C with a MT in 68? If you could what should the two letter code be for a 68 MT 442 (non W30) with A/C. A standard 442 (non W30, w/o A/C) with MT is QW

I'm posting this because the question came up on another forum and has gone basically unanswered for a few days. I know you couldn't get A/C with the W30 (I think).

 

Well, the '68 CSM is showing either QW or QU for a MT 442 400cid, with no A/C distinction.

I'm not an expert on production, but as far as I know, you could get A/C with any engine, except perhaps for the highest revving W-30s, which could over-rev the compressor (at least that's the way it is for another make that offered 454cid motors).

- Eric

 

Mike,
I think the info you're looking for is in the 68 SPECS booklet. I find it a little confusing. Have a look at the back of the book on page 15. There's other info in the ordering sections for each car that clearly shows the M20 and M21 availability and restrictions. The M20 is the question mark. If you got the G88 or G92 axles you could not have AC or Y72. . However, if you wanted the G89 axle, it doesn't say you can't have AC. Also there's no mention about whether you could or couldnt have AC on a 3:08 or 3:23
http://wildaboutcarsonline.com/membe..._Jan._1968.pdf

 

Yes, a/c was available with the 4spd, with exception to the W30

 

D'oh. Forgot about that.

Yup, it shows quite clearly that you couldn't get A/C with the 4:33, 3:91 or 3:42 rears, and since one of those rears was required with the M21, you couldn't get it with the M21 either (all presumably because of the aforementioned risk of overreving the compressor... And, in case you're thinking they could have changed pulley sizes, if they made the compressor turn slower, the A/C wouldn't have worked in traffic, leading to service complaints).

You could have A/C with the M20, so long as you didn't get a set of low rear gears.

- Eric

 

So what is the correct motor letter designation for a 68 442 (non W30) stick with A/C?

Is it the QS which was for A/C applications and the box on Section 6-1 page 100 is does not have an "x" under "syncromesh" or the QW which does not have an "x" in the "Air Conditioning" box?

QU was for a W30 so that's definitely not it.

 

I think I figured it out. The correct answer is QW.

On Section 6-1 page 120 there is a chart of changes to convert a syncromesh engine (which would be a QW) to an A/C application. (right side of the page). Therfore you would start with a QW engine to make these changes.

It also says automatic transmission engines cannot be used to make the changes (except export)

 

Allen,

Thanks for the 68 SPECS booklet. I hadn't been on WAC on a while and I don't think that was posted the last time I was there. I downloaded it now. It's a good reference