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105580 Posts in 12330 Topics by 4753 Members
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31  Camaro Research Group Discussion / Originality / Universal joint retention - metal clips and plastic injection on: July 13, 2011, 07:53:46 AM
I thought this topic worthy of it's own research thread as there seems to be very little info on plastic pin injection and the 1st gen Camaro.
At first I wasn't sure about my drive shaft, but after 'Big Iron' Bob mentioned that he has a known original 68 BB/TH400 shaft [he bought the car new] with the same plastic injection, I suddenly have lots of questions surrounding the topic.

All the pics that others have contributed so far in the driveshaft thread http://www.camaros.org/forum/index.php?topic=7861.0 are all sb shafts with outboard snap rings.
So, when did GM use plastic injection and was there some design criteria that required it, or was it purely economics?
If economics, why [seemingly] only BB's?
And then:
Was it only BB/TH400 cars?
Was it all 1st gen BB's

Research I've done so far suggests that ony GM did this and it's not just a 'pin' of plastic, but that there is a groove in the trunnion caps and matching grooves in the yokes. Plastic is then injected through the holes to fill the grooves.

It seems they are quite tough to get apart. The common removal method I've seen so far is to heat the yoke with a propane torch to melt the plastic as per this youtube video  http://www.youtube.com/watch?v=YZZUjzNCPF0 which seems a bit harsh!

This site http://arrc.epnet.com/autoapp/8844/8844R07_U_JOINT_REPLACEMEN1.htm shows using a cross press arm pressing onto the spider [fig 4.] to sheer out one side at a time.
This not only avoids heating anything, but would maintain an aspect of originality as the 'pins' are left intact  Smiley

All input warmly appreciated  Smiley
A couple of pics of what mine looks like



32  Camaro Research Group Discussion / Research Topics & Reports / Re: Original 67-69 Camaro driveshafts - information requested about your car on: July 07, 2011, 05:06:56 AM
Excellent, thanks Bob, I'm v. happy now! Smiley
Bryon, will post more details and pics this weekend. It's winter here [Au.] , freezing cold and gets dark early.
I just can't get home quick enough atm to do much.
33  Camaro Research Group Discussion / Research Topics & Reports / Re: Original 67-69 Camaro driveshafts - information requested about your car on: July 06, 2011, 01:02:39 PM
Have an original 68 BB SS/RS drive shaft with original injected u-joints
Yokes are in-line.
Centers are 50".
Bolt straps on diff. yoke.
No visible paint strips but would like to clean to see if there are any.
What are you cleaning your driveshafts with and will it affect my original  joints?
Bob
Wow, yours is pin injected as well !!! Are the pins orange in color?
Maybe mine is original after all and still with the factory u-joints.
I haven't noticed any stripes on mine as yet either, but I do have to clean off a thin layer of flat black which I had sprayed over the front half of the shaft many years ago.

Bob, do you know if that shaft was from a TH400 BB car?
34  Camaro Research Group Discussion / Research Topics & Reports / Re: Original 67-69 Camaro driveshafts - information requested about your car on: July 06, 2011, 11:22:33 AM
Ok, got my drive shaft out and can report some preliminaries.
Yokes are in-line.
Centers are 49.95"
Bolted straps on diff yoke.
But....seemingly not original as the u-joints are pinned, not 'C' clipped or snap ringed??
But....pins are OEM only?, replacement uni's  are furnished with 'C' clips? If so, then where the heck did this shaft come from??
35  Camaro Research Group Discussion / Research Topics & Reports / Re: Original 67-69 Camaro driveshafts - information requested about your car on: July 04, 2011, 01:35:27 PM
Will crawl under mine [396/TH400] and report back soon
36  Camaro Research Group Discussion / Originality / Re: LSD diff tag on: July 04, 2011, 01:06:20 PM
Wow, one of my first questions on this forum dug up from a dark, dusty corner  Smiley
Thanks for reviving it and the answers guys!
37  Camaro Research Group Discussion / Originality / Re: 69 Z28 Distributor Hold Down clamp on: January 05, 2011, 11:17:05 AM
Just for more info..On my 70 Z28 you can clearly see the hold down and bolt were painted silver.

http://www.1970z28camaro.com/engine/#
JohnZ, do you know the assembly procedure for motors with Ali intake? Was the intake fitted by the engine plant, or was the whole valley area covered off and the intake and dizzy fitted later on the engine dress line?
38  Camaro Research Group Discussion / Originality / Re: 69 Z28 Distributor Hold Down clamp on: January 05, 2011, 11:04:26 AM
]My 1968 07c Z28 has the stamped steel.
Interesting...the only theory I can think of to make this fit with Jerry@chp's info is that the Z SSDI road tested was an even earlier build with the wire clamp.
There are some unknown variables of course. We don't know exactly when the SSDI road test took place, only that it was before Nov 68 and the build date of the tested 68 Z is also unknown.
39  Camaro Research Group Discussion / Originality / Re: 69 Z28 Distributor Hold Down clamp on: January 05, 2011, 08:27:51 AM
So from Jerry's observations, it would seem that we at least have all 67's, 68's and early 69's using the wire clamp, then changing to the stamped steel clamp, with the changeover possibly somewhere early 69.
In any event, the wire clamp on my 12c built 68 would seem right. [whew!] Smiley

Perhaps other early 69'ers could chime in with what's on their motor to see if we can narrow down the changeover date.
40  Camaro Research Group Discussion / Originality / Re: 69 Z28 Distributor Hold Down clamp on: December 31, 2010, 10:34:42 PM
Hi John, was that style of one piece clamp only a Z thing, with others receiving the two piece wire and saddle?
41  Camaro Research Group Discussion / Originality / Re: Body color on firewall on: December 29, 2010, 11:10:57 AM
Is this the thread?
http://www.camaros.org/forum/index.php?topic=143.0
There were some variations
42  Camaro Research Group Discussion / Originality / Re: Water pump - wrong one? on: December 28, 2010, 08:09:05 PM
also my124677n, the bolt goes in from back to front. looks like you have a bolt through the front.
Well spotted!! Must have a nut on the other end of the bolt  Huh
43  Camaro Research Group Discussion / Originality / Re: Water pump - wrong one? on: December 28, 2010, 01:17:12 PM
Doesn't look too bad, though there may be something wrong at the bottom bracket as well, as the whole alternator 'seems' to be skewed such that the pulley end is pointing inboard.
Perhaps the bottom bolt is undersize [diameter] or some bushes are missing.
It's mostly the bottom bracket that sets the alignment, so everything has to be a close fit there.
Beware of flex fans. I seem to recall a story of one ejecting a blade through a hood.

Nice ride btw!!  Smiley
44  Camaro Research Group Discussion / Originality / Re: Water pump - wrong one? on: December 27, 2010, 02:41:03 PM
The water pump looks fine with short legs and close to the timing cover.
Water pump pulley to crank pulley alignment looks right too [hard to tell in the pic though] so I'd guess it's only an alternator position problem.
'Banging' the bracket forward sounds a bit harsh!  especially by the amount you quote Shocked
Post up a pic of the alternator and bracket.

btw, that's a head twisting pic - trying to separate the timing cover from the pump backing plate!!
45  Camaro Research Group Discussion / General Discussion / Merry Christmas and Happy New Year CRG, Admins and Members!! on: December 23, 2010, 07:49:19 AM
Merry Christmas, Happy New Year and safe journeys to all!!  Smiley

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