This is a great topic, of particular interest to me.
I have been wondering about this very issue as it relates to my 69 L/78 - THM400 Camaro. I have been told so many different things about 69 Camaro THM400
"original" driveshafts that I am truly confused.
So let me add some more questions to the pot......
Did original 69 THM400 equipped SS Camaro driveshafts use the large u-joint on both the front & rear yokes? How do these u-joints mount? Do they use the
circular type clips that go over the end of the caps ( like the standard u-joints ), or c-type clips that go on the inside of the yoke? Can anyone post images for
me? Also, do THM400 driveshafts have the u-joints rotated inline with each other as opposed to rotated from each other? I have been told that the 69 Firebirds
with THM400's used the large u-joint driveshaft, but not Camaro. Did any 69 Firebirds come with THM400's? Also, if the 69 THM400 Camaro used the large u-joint
dirveshaft, what yoke was used on the rear? It would stand to reason that this yoke would need to fit the large u-joint as well - correct? The reason for this question
is that I have never seen a large u-joint pinion yoke for sale anywhere. Is there a separate part number "back in the day" for the THM400 pinion yoke?
Ultimately, I will need to get the correct dirveshaft and pinion yoke and I can use some assistance here.