Confirm driveshaft length Challenger

I have a 70 Challenger 426 Hemi 727 trans Dana 60 differential , all the mounts are stock , can someone who had a driveshaft made or knows the exact measurement let me know what it is , by the book it is 44.6 just making sure before I order one , thanks

A tape measure will tell you better than anyone else what will properly fit you combination.

http://www.dennysdriveshaft.com/how_to_measure.html

https://azdriveshaft.com/how-to-measure/

https://www.driveshaftshop.com/driveshaft-measurement

Best check with your preferred shop on how they want it measured.

My book says 44.60" for Challenger and Coronet part #2883667...

Wait until you have the drive train installed and then measure for the correct length for your set up. Saves having to go through the hassle and cost of having it redone when stock doesn't fit your nonstock install. A 1/2" difference can cause a lot of problems. The other posts you made gave you the same answers.

If everything is stock as the OP states, there should be no problem using the factory length spec.

The problem with the suggested measurement methods is the position of the slip yoke when taking the measurement, lots of different ideas on the correct position.

There's those dirty words. "IF" and "should".

Thanks I will wait till everything is installed , thanks.

Well, golly gee, ya think the factory took measurements on each individual car as it went down the line?

The OP stated everything is stock so the correct driveshaft WILL fit.

It may fit perfectly but are you going to pay him for a new one if it doesn't? Safest is to measure after he gets every thing in place.

I was trying to save some time but a driveshaft is only a weeks time to get shipped , the Dana 60 has the 1350 yolk or U joint , the K member is factory Dodge and the transmission is a 727 so I guess they need the measurements from the end of the transmission tail shaft housing , if anybody has that measurement please post it , thanks.

1970 Dodge Challenger

Like John said, the factory measurement is correct, no guesswork needed. I have used the factory measurements for decades with no issues...

Ok, I give up. Do what the experts tell you to do and best of luck.

Just got my wifes car down on off the lift on all 4 tires its a 71 challenger conv. 440 six pack auto dana 60 1350 trans yoke and rear yoke
trans has the chrysler seal with dust cap- with suspension loaded and with about a 1/2 inch of space between the yoke and seal it measured 44.75 inches u joint to u joint

Shoulda mentioned the 1350 yokes in the OP.

FWIW the factory length driveshaft is usually a little short based on the shafts I have built. It will work no doubt, but the spline engagement of the rear slip yolk and output shaft is better with a slightly longer shaft sometimes. As a side benefit of a longer shaft, the rear seal gets essentially a "new" rear yolk seal area.

Again, this comes down to the individual perception of where the slip yoke should be during length measurement; I prefer to use the factory dimension. (3 3/4")

You don't have a factory yolk on the D60 so using the factory measurement is not prudent unless you can confirm the specs of the 7290 yolk and a 1350 yolk are identical as installed? Also you don't measure from the end of the tailhousing , you measure from the center of the U joint slip yolk u joint hole to the center of the rear end yolk u joint hole.

Are you using a 1350 slip yolk too, you need it to make your measurement.

Your crystal ball must be working overtime ...

John,

Some shaft manufacturers DO want you to measure from the end of the tailshaft case to the center of the diff's u joint bore, I've had a number of shafts made from different vendors over the years, some will make the shaft based on any data supplied by the customer, no questions asked, some vendors prefer to do the math themselves based on an overall length measurement from the tailshaft to the rear diff ujoint bore, esp if they're supplying their transmission yoke design

Mike

Thanks again for all the info.

I agree wit hthat Mike , he didn't originally state he had a different yolk on the rear and still hasn't said what slip yolk he is using so going off that he can't really use the factory length as he originally hoped .