65/66 12 bolt interchange?

MoboMac · Poncho Master!

65/66 12 bolt interchange?

65wagon · Poncho Master!

all the same two types of shaft the quiet two piece and heavy duty one piece, i never did find out why the 409 cars are running the big yokes

4SPEED427 · A Poncho Legend!

Wow, I would have bet (and I don't bet!) all 65 and up had a 1 piece.

How did they mount a hanger bearing on that style of frame?

-- Edited by Carl Stevenson on Wednesday 11th of January 2012 05:50:41 PM

seventy2plus2 · Canadian Poncho Superstar!

Carl Stevenson wrote:
Wow, I would have bet (and I don't bet!) all 65 and up had a 1 piece.

How did they mount a hanger bearing on that style of frame?

And yes, 12 bolt uses a shorter shaft.

Transmission type also determines driveshaft length.

2drpost · Uber Guru

huuuhh? evileye

'65-'70 b bodies, one piece driveshaft

change from a 10 bolt to 12 bolt, same driveshaft

4SPEED427 · A Poncho Legend!

You guys are right. I hate being wrong, but I was.

I will delete that to avoid confusion. I have NO idea what I was thinking.

67Poncho · Uber Guru

69 belair wrote:
huuuhh?
'65-'70 b bodies, one piece driveshaft
change from a 10 bolt to 12 bolt, same driveshaft

Except for THM 400 (of course) Different yolk as well. ('67-'70) Not sure of '66. Never had one!

-- Edited by 67Poncho on Wednesday 11th of January 2012 09:21:34 PM

gparis7 · Canadian Poncho Superstar!

The rear ends will bolt in for all years from 65-70, but the 65-66 cars have slightly different mounting bracketry for the upper control arms. T400 yolk is same from 65-70, and is the only thing you have to change on the driveshaft if going from PG or T350 to T400.

MoboMac · Poncho Master!

gparis7 wrote:
The rear ends will bolt in for all years from 65-70, but the 65-66 cars have slightly different mounting bracketry for the upper control arms. T400 yolk is same from 65-70, and is the only thing you have to change on the driveshaft if going from PG or T350 to T400.

That's what I thought,just wanted to make sure.

Thanks for all the replys.

65wagon · Poncho Master!

no guys there are two shafts by two piece i did not mean the center bering style, what it is , is a shaft within a shaft in rubber they strong but can let go because of age, the other unit is a traditional one piece shaft they seem to be lighter. the lenght is the same for pg 350 the 400 is the only odball. what i meant by yoke size was a the rear end i have the big yoke on both cars .

gparis7 · Canadian Poncho Superstar!

I recall seeing a rubber insulated shaft somewhere along the line but I can't remember what year the car was.

As to yoke size, the spline count is different for T400 vs the rest, but I've never seen a shaft on either a 10 bolt or a 12 bolt that didn't use the same size u-joint. Is that what you meant - the dimensions of the yoke?

I could also be wrong. I'm no expert - I'm just going on what I've seen in owning a lot of B bodies between 62 & 70.

65wagon · Poncho Master!

that must be it insulated shaft, i always thought they were low performance only but it was stock on our 300hp par but its a very early production car lot of 64 marked parts on it it was all heavy duty. as far as the yoke size i havnt seen to many 09 cars, and i was never realy interested in the underside till i got these two, the drive shaft diameter is the same as a heavy duty 300hp but the yoke on the dif and the trans yoke are a larger diameter they are the same as on 1 ton trucks of the time, thats all i was wondering about

67Poncho · Uber Guru

65wagon wrote:
no guys there are two shafts by two piece i did not mean the center bering style, what it is , is a shaft within a shaft in rubber they strong but can let go because of age, the other unit is a traditional one piece shaft they seem to be lighter. the lenght is the same for pg 350 the 400 is the only odball. what i meant by yoke size was a the rear end i have the big yoke on both cars .

I have never seen an "insulated" shaft... The only insulation I have seen is the yolk dampner on both 'glides and THM400's.

NOTE: These shafts are off of '66-'68 with Powerglides. Funny thing is, I never saw a 'glide shaft with a damper untill I got that 2dr '67 Grande from 66grandeguy last year. I do have both styles of the THM 400 shaft with and without the dampner!

-- Edited by 67Poncho on Friday 13th of January 2012 04:17:19 PM

65wagon · Poncho Master!

the insulated end is at the other side faceing the diff and looks as if a tube got shoved inside another tube with a quater inch of black foam around it between the tubes ill snap a pic when i go to town

-- Edited by 65wagon on Friday 13th of January 2012 08:12:18 PM

gparis7 · Canadian Poncho Superstar!

I have seen one of these described by 65 wagon. But I can't recall which car it was on.