Author Topic: Driveshaft length  (Read 1932 times)

Offline erat340

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Driveshaft length
« on: September 30, 2013 - 04:35:33 PM »
73 challenger 340 727. Last year, put a B body 8-34 housing from ,I think a Belvedere, used my old 489 chunk. Could barely get the shaft in , maybe 1/2 left before trans out shaft hit slipyolk end plug. Had a vibration at 60+ mph and solved with 4* shims  under the perch, nose up.Then my clearance was all but gone, but it drove well. Just did a 4spd conversion from Brewers. Now it wont install untill I take the axle loose & take the shims out. Anyone else been this route?..What would be suspect 1st? (there will be a test on this later)




Offline cwestra

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Re: Driveshaft length
« Reply #1 on: September 30, 2013 - 05:01:26 PM »
What is the drive shaft length?
Corey - in Northern Indiana

Offline erat340

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Re: Driveshaft length
« Reply #2 on: September 30, 2013 - 05:47:02 PM »
Im not with the shaft now to measure it , but its the factory shaft that came with the car..340 727 8 3/4.

Offline brads70

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Re: Driveshaft length
« Reply #3 on: September 30, 2013 - 06:07:55 PM »
B-body housing will have nothing to do with it. Sounds like you have the wrong length driveshaft? Just measured my 727/8 3/4 driveshaft at 44-3/4" center to center of the u-joints if that helps to compare.
Brad
1970 Challenger 451stroker/4L60 auto OD
Barrie,Ontario,Canada
Proud to own one of the best cars ever made!!!!!

My restoration thread 
http://www.cuda-challenger.com/cc/index.php?topic=59072.0
 My handling upgrade post
http://www.cuda-challenger.com/cc/index.php?topic=73985.0

Offline erat340

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Re: Driveshaft length
« Reply #4 on: September 30, 2013 - 06:21:40 PM »
Thanks Brad Ill head home & measure mine

Offline erat340

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Re: Driveshaft length
« Reply #5 on: September 30, 2013 - 09:52:52 PM »
Mine measures out at around 46 inches

Offline brads70

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Re: Driveshaft length
« Reply #6 on: October 01, 2013 - 04:31:48 AM »
Mine measures out at around 46 inches

Might be for a Cuda? :dunno:
Brad
1970 Challenger 451stroker/4L60 auto OD
Barrie,Ontario,Canada
Proud to own one of the best cars ever made!!!!!

My restoration thread 
http://www.cuda-challenger.com/cc/index.php?topic=59072.0
 My handling upgrade post
http://www.cuda-challenger.com/cc/index.php?topic=73985.0

Offline Katfish

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Re: Driveshaft length
« Reply #7 on: October 01, 2013 - 06:09:26 AM »

Offline cwestra

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Re: Driveshaft length
« Reply #8 on: October 01, 2013 - 07:22:27 AM »
340 should use 45.79" long shaft (manual or auto).
Corey - in Northern Indiana

Offline brads70

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Re: Driveshaft length
« Reply #9 on: October 01, 2013 - 08:25:27 AM »
 :-[  I was mistaken it's 45 3/4" After I looked at the chart I went out and re-measured. Sorry about that! :banghead:
Brad
1970 Challenger 451stroker/4L60 auto OD
Barrie,Ontario,Canada
Proud to own one of the best cars ever made!!!!!

My restoration thread 
http://www.cuda-challenger.com/cc/index.php?topic=59072.0
 My handling upgrade post
http://www.cuda-challenger.com/cc/index.php?topic=73985.0

Offline erat340

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Re: Driveshaft length
« Reply #10 on: October 01, 2013 - 10:20:49 AM »
So.. Im real close to spec. Im wondering if the b body spring perches have something to do with it? Looks like they have been removed and rewelded(sloppily)

Offline brads70

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Re: Driveshaft length
« Reply #11 on: October 01, 2013 - 01:32:25 PM »
So.. Im real close to spec. Im wondering if the b body spring perches have something to do with it? Looks like they have been removed and rewelded(sloppily)

I can't see it. B-body rear housing is a width thing . I'm wondering about your spring length or spring hangers?
Brad
1970 Challenger 451stroker/4L60 auto OD
Barrie,Ontario,Canada
Proud to own one of the best cars ever made!!!!!

My restoration thread 
http://www.cuda-challenger.com/cc/index.php?topic=59072.0
 My handling upgrade post
http://www.cuda-challenger.com/cc/index.php?topic=73985.0

Offline erat340

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Re: Driveshaft length
« Reply #12 on: October 01, 2013 - 06:51:35 PM »
Original factory springs, have been rearched long ago. With the B housing went in DRs 1" re locator brackets & shackles

Offline brads70

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Re: Driveshaft length
« Reply #13 on: October 01, 2013 - 07:39:06 PM »
Original factory springs, have been rearched long ago. With the B housing went in DRs 1" re locator brackets & shackles

Measure the front spring segment is it 22" or 20"
Brad
1970 Challenger 451stroker/4L60 auto OD
Barrie,Ontario,Canada
Proud to own one of the best cars ever made!!!!!

My restoration thread 
http://www.cuda-challenger.com/cc/index.php?topic=59072.0
 My handling upgrade post
http://www.cuda-challenger.com/cc/index.php?topic=73985.0