Corvair Forum

cnicol wrote: ↑Tue Mar 26, 2024 5:17 pm - Either someone changed the '63 transmission mainshaft to the short '60 style

I wonder how hard it was to do?

Maybe the mainshaft was interchangeable?
https://ssl.corvair.com//user-cgi/catal ... w_page=129

It sure would be nice to know who this Dave Watson feller is lol.. took me a minute

Thanks this is probably the method I'll use when the time comes.

The early posi's still used the long/short stub axles as the open diffs did. The posi side (short if I remember correctly) did use a special very flat shield washer. So I don't have an early Posi.. but curiosity did get the better of me last night and I just wanted to take a peak into the transmiss...

As you might imagine, there's no way you can bolt the two together without modification. - Either someone changed the '63 transmission mainshaft to the short '60 style OR - Someone changed the pinion shaft in the differential to accept the longer output shaft found on '61-5 3-sp and 4-sp transmissi...

Regarding "axle length", Rex was referring to the little stub-axles that go into the differential. '60s had two identical "short" stub axles, while open-differentials in 61-64 cars had stub axles of different lengths. Totally inaccurate numbers, but just to give you an idea, &qu...

If you check your axles I'm betting that you will have 2 different lengths. They both measure about 23 inches and seem to be the same length. Here's the differential information from the first post: Differential: Date code: B660 (6th day of June?) 3780263 BR6 6 (Type BR 6th day of June) Looks to me...

That's a pretty awesome description so I have a oh shoot car lol. Sometime between the order and the delivery things (4-Speed transmission) went amiss and they made it work with that they had. I wonder how many YDs there are? At what point did Tonowanda get the memo stop with the YDs or did they jus...

More fun: BR is the differential code for a '60 95hp 3sp! How's that going to fit a later 3-sp with it's completely different output shaft? DSCF7102 MU.jpg Let's say you're GM and you have built some YD motors but the 4-sp option is delayed until the next model year. What are you going to do with t...

It all depends on how comfortable you are with your phone or computer. I would say if you're good at taking pictures with your phone stick with using your phone. Take a picture on your phone and then attach it to the post from your phone where it's stored. I have an Android phone so I use Google pho...

The issue I have is the Differential seems to be original (made in June BR code etc..) but maybe I'm reading it wrong. So if a different Differential was needed seems like it would have been swapped out, but maybe like you (and others) say it's a drop in replacement. After I get the engine going I s...

Also that Stock 4SP cutout picture doesn't match anything I have seen in my research looks to be a blown-up picture from here: https://corvaircenter.com/forum/viewtopic.php?t=176029 which if I understand correctly is modified and still needs some work for strength. I would have reinforced it a bit ...

Also that Stock 4SP cutout picture doesn't match anything I have seen in my research looks to be a blown-up picture from here: https://corvaircenter.com/forum/viewtopic.php?t=176029 which if I understand correctly is modified and still needs some work for strength. I would have reinforced it a bit m...

Okay I am posting some pictures, from my model it doesn't seem like a notch would have made much of a difference as it's pretty flush to the cross member on the body it attaches to. Does the body have a notch as well? Are there any pictures of a 4-speed mounted to compare? CrossMember.jpg CrossMembe...

This is awesome information, I would think there would be differences between Iron Casting and Aluminum structure and strength considerations but maybe they could be identical. I'll take a look now that I know what to look for and post pictures. Thanks again.

Jeremiah, would you mind posting a picture of the center section of the rear suspension cross member where the transmission support bolts on? This area should be exposed since the transmission is out. I am interested to see what GNM did to accommodate the longer 44-speed transmission. I can but the...