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#1
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71 WS4 propeller shaft colors
Guys.. I see the propeller shaft stripe colors for 1971 TA's is OBN: orange blue brown. Looks like the same color for the stripes was used on M40 or M22 trannys. Surprised me the book shows same colors, but that is what I see. Can someone confirm these colors for the 4 speed and does anyone have a picture of the blue color??is it a dark or light blue stripe?
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#2
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Can I not get anyone to confirm this color and stripe combo?? There has to be some 71 HO guys on this board?? or have we become the 72 TA board now??lol
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#3
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striped were used to ID shafts when installing, the M40 and m22 were different shafts. It doesnt really make sense they have the same stripes.. I will look at some older pics on Saturday. Interesting .. FB
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"The Future Belongs to those who are STILL Willing to get their Hands Dirty" .. my Grandfather |
#4
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'bruce..I understand the reasoning behind the stripes..But in the 1971 assembly manual and in the 1972 dated MPC I have both have the same part number and in the assembly manual the same stripe markings. The assembly manual has these stripe colors listed 3 different places, all show OBN for both the M40 and the M22. It is strange to me as well, which is why I decided to post here to see what the board thought..
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#5
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'70 400 with a M22 got # 3981932 shaft, the TH400 got # 3981930 ( 67-72 MPC)
Neither show up in '71, but neither did the 12 bolt on the back end , and since its an assembly, the rear "u" joints may have been bigger. I find it odd they would use a stripe the same as a previous year, but for a different shaft... Something isnt right, as you suspect. O-B-BN in '71 is # 7811095 ( sourced from assy.) Ill find a picture when I get back up.. love to hear how this works out..
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"The Future Belongs to those who are STILL Willing to get their Hands Dirty" .. my Grandfather Last edited by Formulabruce; 02-15-2014 at 04:52 AM. |
#6
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From 71 Service Manual:
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
#7
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BobC had one posted ('71 TA, 455HO/M22).
http://www.forums.maxperformanceinc....d.php?t=566427 I'll also add the later docs (than Service Manual docs). |
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#8
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It Seems the '71 service manual lumps them all together ( TH400 and Manual) while we know they are different, and different thickness as well. Meanwhile, the assy. manual lists them as different part numbers. It would be illogical to paint them both the same, if painting was for identification. Im baffled.. still looking for pics of a 70 prop shaft. This indicates they are same diameter, I seem to remember my 70 TH400 having a much bigger center section and getting to a smaller diameter at the ends.. here is the 1970 info..which DOES show the colors are different for a M40 ~vs~ M22
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"The Future Belongs to those who are STILL Willing to get their Hands Dirty" .. my Grandfather Last edited by Formulabruce; 02-15-2014 at 03:17 PM. |
#9
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Thanks, HFR, nice docs.
The 71 would be different from 1970 I would think, because the M-22 received the bigger rear output shaft like the TH400 shaft. (instead of the TH350/M20 size) How they got around the longer transmission length of the TH400, I don't know. (unless the shaft yoke was longer and had more 'travel') The TH350/non-M22 trannies could/would use the same length shaft.
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
#10
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Quote:
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#11
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When the Muncie 4speeds went to big output shaft design ('71 in F-bodies), the driveshaft was the same length, whether Turbo 400 or Muncie 4spd. Unless driveshaft thickness or u-joint size was changed, the stripes codes should be the same.
The main difference I've watched for on '71-74 Formula 400-455/TransAm factory driveshafts is the u-joint size. Factory doc's, along with the Hollander manual note the '71 Bird 3.42 Turbo 400 driveshaft as having 3R u-joints. Why only the 3.42 posi/Turbo400 combo? That begs the question as the 3.42 ratio was also used behind M22's, yet factory Formula 400-455/TransAm driveshafts behind the '71 & '72 M22's all had the smaller Spicer 1310 u-joints.
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Buzzards gotta eat... same as worms. |
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#12
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Roger,
To clarify, did '71 Firebirds with M22 and 3.42 have 1310 or 3R? |
#13
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Rocky.. the u joints I just pulled are 3 R's 1 1/8" end caps..late build 1971, June 3rd week 71 build date..
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#14
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Thanks, Bill. The way I understood it, 3R was on all 3.42 applications, regardless of transmission.
Roger, I think the confusion comes from the Chevy side where 3.42 was the only axle ratio available with the BBC in the Camaro, which was only backed by the TH-400. |
#15
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Rocky, you & Bill are correct, went through my driveshaft barrels & cked numerous original early 2nd Gen driveshaft ends.
If you ever are able to interview any of the original drivetrain engineers, would love to hear any insight why Pontiac used the stronger 3R on the 3.42 M40/M22 application F-body in '71, yet returned to the 1310 on all '71-74's, then went to the 3R's on all '75-81's.
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Buzzards gotta eat... same as worms. |
#16
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Since we are talking about u joints/yokes..I have a question. What is the material that is inside the yoke holes on each side? Looks like a plastic material that was squeezed in once the u joints were installed. Both sides,180 degrees apart, of each side of the yoke has holes drilled in that have some of this plastic material oozing out. All dried now, but you can tell it was liquid at some point. Does anyone know what this was??
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#17
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The greenish material was injected in to the joint after assembly (filling in a groove cut in the shaft and joint cup) eliminating the need for metal clips to keep the U-joint bearing caps in place. Heating the ends of the joint with a blow torch will cause the material to flow out and allow the joint to be disassembled easily. The replacement joints use metal retainer clips.
Not sure exactly what type of material it is but when it melts it expands to many times it's original volume and squirts out the holes. Therefore I assume that it is injected as a cold liquid. Pic is from the 71 firebird factory assembly manual.
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1969 TA RAIII M40 Auto Cameo White/ Std Blue Int 1970 TA RAIII M21 4-spd Lucy Blue/Std Black Int 1971 TA 455 HO M22 4-Spd Lucy Blue/Deluxe White Int Last edited by RAJ7395; 02-16-2014 at 08:44 PM. |
#18
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copied this info hope it helps
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