switching from a 383 4 speed to a hemi 4 speed

[mike smock]

i currently have a 383 a833 4 speed in my 69 roadrunner, i have a fresh rebuilt hemi a833 i picked up. i realize there diff spline count i also have the proper drive shaft question is can i use the driveshaft even though its out of a e body part number 2883730. if not can i just change out the yoke? ideas??

 

[PRHeads]

The spline count difference is with the input shaft.
The same drive shaft and yoke can be used for both.

 

[mike smock]

yep my bad i was thinking the wrong end of the tranny! so i will need the right clutch and throwout bearing, which i have correct?
and able to use my existing driveshaft correct?

 

[PRHeads]

Well, I don’t know what clutch you have, but yes...... you need an 18 spline disc and the proper throw out bearing for the 18 spline trans.
The drive shaft and yoke from the 23 spline can be reused.

 

[4mulas]

There are also two different splines for the output shaft. 26 or 30. My 18 spline a-833 has 30. Couldn’t use the driveshaft I had lying around for a 26 spline output shaft. Cost me Another $650 for a new driveshaft lol

You will definitely need a new clutch disc, maybe just do the pressure plate while you’re in there. I don’t think there’s a difference on the throw out bearing..

 

[silversedan]

throw out bearing is bigger

 

[4mulas]

throw out bearing is bigger

Ok. Didn’t know the diameter of the shaft was different too. I guess cause it came In my new clutch kit/package I didn’t really think about it

 

[MCODECUDA]

Your original driveshaft will be too long. I forget how much longer it is but you might be able to get away with using front spring hangers from a Dodge B-body to move the rear end back some. Also check to make sure that your input shaft bearing retainers are the same size. The bearing retainer for 66 & 67 was smaller than 68 - 72. Your original yoke will also work in either transmission.

 

[Fran Blacker]

He has an E body driveshaft it will probably be to short.

 

[PRHeads]

I saw:

i currently have a 383 a833 4 speed in my 69 roadrunner, i have a fresh rebuilt hemi a833 i picked up.

And interpreted that as, the car currently is being run with a 23 spline trans, and the OP is swapping to an 18 spline.

The drive shaft and yoke should work for both transmissions.

 

[R/T Boy 67]

The trans mount position changed in 1970, so depending on the year of the new trans compared to the old one, you might need a different crossmember. As stated, the driveshaft is the same.

 

[toolmanmike]

Why switch?

 

[Daves69]

.........
DC_ClutchTrans_Race_Bulletin.pdf (mymopar.com)

 

[PRHeads]

The trans mount position changed in 1970, so depending on the year of the new trans compared to the old one, you might need a different crossmember. As stated, the driveshaft is the same.

Or.....swap the tail housing(you need to know your way around the trans for that option).

 

[Kern Dog]

Couldn’t use the driveshaft I had lying around for a 26 spline output shaft. Cost me Another $650 for a new driveshaft lol

Holeeee Crap! Where are you getting your drive shafts? I've never paid more than $120 to have new U-joints and a balance and I'm in California. Even a NEW one should be no more than double that.

 

[mike smock]

Why switch?

current trans been sitting 40 plus years has a couple leaks so instead of going through it i can throw this rebuilt one in i just got thats all

 

[4mulas]

Holeeee Crap! Where are you getting your drive shafts? I've never paid more than $120 to have new U-joints and a balance and I'm in California. Even a NEW one should be no more than double that.

That’s in canabucks which are worthless compared to yours, lol. So, for about $485 USD was for a brand new 3.5” driveshaft With Brand New spicer yokes, one for the front and one for the rear Dana 60, with spicer 1350 U-joints. Balanced.

Is that more in line?

Things in Canada are expensive. If I could get a sponsor or find a way to immigrate to the states I probably would.....

 

[Fran Blacker]

Fly in ask for asylum, if central americans can why not Canadians. That oppression from JT.

 

[sam dupont]

Put a 1970 18 spline in my '66 383. Been a long time ago, but I recall having to use an Aluminum bellhousing and build an adapter for the mount. Driveshaft and Yoke worked fine. Seems to me I ended up with a 10.5" Clutch, but....
Had to drive all over Denver to find the correct TO Bearing. I thought at the time that the 383 worked better with the original 23 spline gear ratios.

 

[MCODECUDA]

Your original driveshaft will be too long. I forget how much longer it is but you might be able to get away with using front spring hangers from a Dodge B-body to move the rear end back some. Also check to make sure that your input shaft bearing retainers are the same size. The bearing retainer for 66 & 67 was smaller than 68 - 72. Your original yoke will also work in either transmission.

It seems funny to reply to my own post but the driveshafts are the same fo 23 vs. 18 spline input shafts. For some reason I was thinking rear end swaps 8-3/4 vs Dana 60. Sorry for the confusion.