Driveshaft questions

[DMZ73]

Yeah, it's me again...
I have a few more questions pertaing to the driveline- especially the driveshaft.
1.) is there a STD length for the SB 727 w 8 3/4?
2.) is it common for different shops to measure from different reference points?
3.) I heard that dodge used a shaft within a shaft design for some models. Is this true?
4.) the driveshaft that I have has a large 1.25 wide, 7" diameter cast steel cylinder right before the slip-yolk u joint. The machinist recommended a new shaft saying that that part should be gone, as it ads weight/mass.
I agreed with him in principal, but instructed him to keep that side anyway, and keep the shaft. ( I don't have the coin to throw at a new shaft right now)

please let me know what you think.
I'll post pics tomorrow.
Dan

Dan

[Chryco Psycho]

yes there is a std measurement for a driveshaft in a Chall with a 727 / 8.75 , do I have it handy no
 I always measure from the center of both U joints for length
 I have seen some shafts with inner tubes
 most of theshafts I have seen for E body do not have the weight ring on them , there were more common on 60s B bodys , if it is not interfering it can be left on

[DMZ73]

Thanks niel!
As usual, you rock!
The shop asked me for the following measurements:
end of the tailshaft case to the CL of the rear pinion U joint
48 7/8
tailshaft end to the CL of the rear pinion u joint
47 3/4
total distance the shaft protrudes from the case:
roughly 1 1/8- 1 1/4
 
Hope this is kosher. Otherwise, it will be expensive!

Dan

[tactransman]

Here is some info:
This is a chart of common 1966 and later RWD Mopar slip yokedriveshafts. It is sorted by length to help with interchange.
Mopar Slip Yoke Driveshafts PartNo Years Dia" Length" Trans Rear Engine Body
2883775 1970-71 3.25 42.60 727,833 9-3/4 426 440 Barracuda Coronet
2996134 1974 3.25 43.29 727,833 8-1/4 318 360 Barracuda
2883636 1970 3.25 43.60 727 8-3/4 383 426 440 Barracuda Coronet
2996134 1971 3.25 43.79 727/833 8-3/4 340 Barracuda
2883769 1970-71 3.25 43185 727/833 8-3/4 340 Barracuda
2883667 1970-71 3.25 44.60 727/833 9-3/4 426 440 Challenger Coronet
2883690 1970-72 3.00 44.99 727 8-3/4 340 Duster Demon
2883656 1970-71 3.25 45.60 727/833 8-3/4 340 383 440 Challenger
2996142 1971 3.25 45.79 727 8-3/4 340 383-2 Challenger
2883782 1970 3.25 45.85 727/833 8-3/4 340 Challenger
3578138 1974 3.00 47.40 904/230 8-1/4 318 Barracuda
2852228 1967-69 3.25 47.81 727 8-3/4 340 383 Dart
2883693 1970 3.25 47.99 727 8-3/4 340 Dart
2852206 1967-69 2.75 48.60 904 8-3/4 273 318 Barracuda Valiant
2852206 1967-69 2.75 48.60 833 8-3/4 273 318 340 383 Barracuda Valiant
2852216 1968-69 3.00 48.88 727 8-3/4 340 393 Barracuda
2996157 1972 3.25 48.89 904/230 8-3/4 225 318 Duster Demon
2883760 1970-72 2.75 48.96 833 8-3/4 340 Duster Demon
2883760 1970-72 2.75 48.96 904 8-3/4 198 225 318 Duster Demon
2883752 1971 2.75 49.27 904/833 8-3/4 198 225 318 340 Valiant
3578146 1973 3.00 49.40 727/833 8-3/4 318 340 Challenger
2996105 1971 3.25 49.50 727/833 9-3/4 426 440 Belvedere Coronet
2781952 1966 2.75 49.58 904/833 8-3/4 170 225 225 273 Barracuda Valiant
2996146 1971-73 3.25 49.89 727/833 8-3/4 318 340 Challenger
3467151 1973-76 3.25 49.90 904/833 8-1/4 225 318 340 360 Duster Dart Sport
2883779 1970-72 3.25 49.95 727 8-3/4 318 Challenger
2883766 1970 3.25 50.18 727 7-1/4 225 318 Barracuda
2781955 1966-67 3.00 50.27 833 9-3/4 426 Belvedere Coronet
2853247 1968-69 3.00 50.39 833 9-3/4 426 440 Belvedere
2996101 1971 3.25 50.68 727/833 8-3/4 383 426 440 Belvedere Coronet
2996109 1972-73 3.25 50.80 727/833 8-3/4 400 440 Belvedere Coronet
2852326 1968 3.00 50.96 833 9-3/4 426 440 Coronet Charger
2660628 1967 2.75 51.03 727 8-3/4 225 318 383 Belvedere
2781953 1967 2.75 51.15 727/833 8-3/4 426 440 Belvedere Coronet Charger
2660628 1966-67 2.75 51.28 745 8-3/4 225 273 318 383 Belvedere Coronet Charger
2996268 1974 3.25 51.34 727/833 9-1/4 360 400 440 Belvedere Coronet
2781953 1966 3.00 51.40 727/833 8-3/4 426 Belvedere Coronet Charger
2533192 1967-69 2.75 51.43 904/833 7-1/4 225 273 318 Barracuda Valiant
2852161 1968-69 3.00 51.50 727/833 8-3/4 383 426 440 Belvedere
2852212 1967-69 3.00 51.53 833 8-3/4 273 318 340 383 Dart
2996137 1973-76 3.25 51.89 904/833/230 8-1/4 225 318 340 360 Duster Dart Sport
2883758 1972 3.00 51.96 904/230 8-3/4 225 318 340 Dart
2660635 1967-68 2.75 52.00 727 8-3/4 318 383 Belvedere Coronet Charger
2852162 1968 3.00 52.07 727/833 8-3/4 383 426 440 Coronet Charger
2852118 1967 3.25 52.27 727 8-3/4 440 Charger
2660635 1966-67 2.75 52.28 727/833 8-3/4 361 383 426 Belvedere Coronet Charger
3467155 1973-76 3.25 52.70 904/833/230 8-1/4 225 318 340 360 Duster Dart Sport
2883696 1971-74 3.25 53.18 727/833 8-3/4 225 318 340 360 400 440 Belvedere Coronet
2996113 1974 3.25 53.30 727/833 8-1/4 400 Belvedere Coronet
2996195 1970 3.25 53.64 727 8-3/4 383 440 Belvedere
3578322 1974 3.25 53.80 727/833 8-1/4 400 Belvedere Coronet
3578331 1974 3.25 53.84 727/833 9-1/4 400 440 Belvedere
2853237 1967-76 3.00 54.36 904 7-1/4 170 225 273 318 Dart
2660622 1966 3.00 54.54 904/833 7-1/4 273 Valiant
2996201 1971-73 3.25 54.86 727/833 8-3/4 318 Belvedere Coronet
3578301 1974 3.25 54.92 727/833 8-3/4 225 318 Belvedere
2533148 1966 2.75 55.42 727/833 8-3/4 225 273 318 Belvedere Coronet Charger
2660550 1968-69 3.00 56.17 904 8-3/4 225 273 318 Coronet Charger
2660550 1966 2.75 56.42 904/903 8-3/4 225 273 318 Belvedere Coronet Charger
2660607 1966 3.00 56.61 904/833 7-1/4 170 225 273 Dart
2883735 1972-73 3.25 57.36 727/833 8-3/4 225 318 Belvedere Coronet
2996121 1972 3.00 57.42 727/833 8-3/4 225 318 Belvedere Coronet
2852253 1968-69 3.00 57.65 904/903 7-1/4 225 273 Belvedere Coronet
2996121 1974 3.00 57.82 727/833 9-1/4 360 Belvedere Coronet
2852222 1968 3.25 57.93 727 8-3/4 383 440 Chrysler

[DMZ73]

 
the knowlege and experience on this site is truly dumbfounding.
That is way more than I expected. Way more.

just wanted to confirm my final measurement for length..
48.75 from tailshaft to CL of rear yolk
1 1/8" from the end of the tailshaft spline to tailshaft housing
I have the other measurements from the slip yolk to the first U joint
I will have to add them later.

Dan

[Chryco Psycho]

ok I don`t understand how a 340/ 727/ 8 3/4 Chall can be 45.8 " while the 318/ 727 /8 3/4 can be 49.9"
 same tranny & diff mounted int he same place where is the 3" made up ??

[71chally416]

ok I don`t understand how a 340/ 727/ 8 3/4 Chall can be 45.8 " while the 318/ 727 /8 3/4 can be 49.9"
 same tranny & diff mounted int he same place where is the 3" made up ??

Good question. 

[Chryco Psycho]

I can`t remember for sure but I think I was 46.6 with the 833/ dana

[71chally416]

I remember they had all the different lengths listed in the old white Chrysler race manual. I have it somewhere but it was packed away when I moved in '99 and I haven't seen it since. They're probably listed in the newest one as well. It's $10 at Moparts>  http://www.mopartsracing.com/parts/tools.html

P5007160 Mopar Chassis

[tactransman]

That info was from Moparts,take it for what it is ........ "Internet Info" !  I will look and see if I can find some info in the Mopar Chassis book.

[Bullitt-]

Dan, Would it help you if I measured my drive shaft... I have a '73 Rallye 340/727/8.75

I don't quite understand "from tailshaft to CL of rear yolk" where to measure.

Wade

[DMZ73]

Thanks Wade, I appreciate it.

I have given the shop the measurements they requested, so I should be good to go.

I'll let ya know how it turns out tonight!

Dan

[Aracer]

ok I don`t understand how a 340/ 727/ 8 3/4 Chall can be 45.8 " while the 318/ 727 /8 3/4 can be 49.9"
 same tranny & diff mounted int he same place where is the 3" made up ??

     Bingo! the length of the 318cu.in./904/999 trans is shorter than the 727 on the 340. 

[DMZ73]

I had it shortened and balanced at CCI, in Marine City all for the price of 80$.
It fits perfectly. It went in easily, and best of all, it was not as bad as I thought it would be.
 

dan

[dodj]

ok I don`t understand how a 340/ 727/ 8 3/4 Chall can be 45.8 " while the 318/ 727 /8 3/4 can be 49.9"
 same tranny & diff mounted int he same place where is the 3" made up ??

I think the 318 Challengers had 904 transmissions not 727's