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Driveshaft Length Help (and Slip Yoke)UPDATE #1402889
03/15/13 05:05 PM
03/15/13 05:05 PM
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Scamp408 Offline OP
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Just got my trans back in and while putting my DS back in I only have a 1/2" of room until it bottoms out. This is with the car on jackstands but on axle and control arms. Is This enough play?

Last edited by scamp408; 03/22/13 08:25 PM.
Re: Driveshaft Length Help With Caltracs [Re: Scamp408] #1402890
03/15/13 05:24 PM
03/15/13 05:24 PM
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Romeo MI
MR_P_BODY Offline
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Quote:

Just got my trans back in and while putting my DS back in I only have a 1/2" of room until it bottoms out. This is with the car on jackstands but on axle and control arms. Is This enough play?




I've always run 3/4" as the spec.... 1/2" might be on
the close side... would hate to see you bottom out
and bust up stuff

Re: Driveshaft Length Help With Caltracs [Re: MR_P_BODY] #1402891
03/15/13 05:29 PM
03/15/13 05:29 PM
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Scamp408 Offline OP
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I ran it like this for years but thought 1/2 was too close.

Re: Driveshaft Length Help With Caltracs [Re: Scamp408] #1402892
03/15/13 05:36 PM
03/15/13 05:36 PM
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Renton Washington
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Triple Threat Offline
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That's pretty tight, if you let the rear end hang it will probably get even tighter.


-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
Re: Driveshaft Length Help With Caltracs [Re: Triple Threat] #1402893
03/15/13 05:40 PM
03/15/13 05:40 PM
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Scamp408 Offline OP
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I cant tell what it bottoming out on either. I just freshen up trans and the stator sealling rings were shot .

Re: Driveshaft Length Help With Caltracs [Re: Scamp408] #1402894
03/15/13 05:42 PM
03/15/13 05:42 PM
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Quote:

I ran it like this for years but thought 1/2 was too close.



On SS springs and 1 year on monos.

Re: Driveshaft Length Help With Caltracs [Re: Scamp408] #1402895
03/15/13 08:38 PM
03/15/13 08:38 PM
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So Mr P I should look for 3/4? I will get it on the ground and ck it again and also ck the pinion angle to make sure nuttin moved.

Re: Driveshaft Length Help With Caltracs [Re: Scamp408] #1402896
03/15/13 08:46 PM
03/15/13 08:46 PM
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Romeo MI
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Quote:

So Mr P I should look for 3/4? I will get it on the ground and ck it again and also ck the pinion angle to make sure nuttin moved.




The Munroe trans book says 3/4"... so thats what I
have been using for years

Re: Driveshaft Length Help With Caltracs [Re: MR_P_BODY] #1402897
03/16/13 07:17 AM
03/16/13 07:17 AM
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A shed in England
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You could try shimming out the front spring hangers 1/4 inch. If you have the room for the tyre


'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
Re: Driveshaft Length Help With Caltracs [Re: Tig] #1402898
03/16/13 08:36 AM
03/16/13 08:36 AM
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Romeo MI
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Quote:

You could try shimming out the front spring hangers 1/4 inch. If you have the room for the tyre




This is what I would do... in most cases it centers
the tire better in the wheel well

Re: Driveshaft Length Help With Caltracs [Re: MR_P_BODY] #1402899
03/16/13 10:22 AM
03/16/13 10:22 AM
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Scamp408 Offline OP
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Already have the axle 1in back but thanks. I think the yoke is the problem. I have a output shaft for a 727 handy and it only slides in so far,it doesnt bottom out. I also have an old mopar yoke and it bottoms out on both extra shaft and trans.I looked inside yoke but cant see any damage but it does fit tighter than the mopar one.

Last edited by scamp408; 03/16/13 10:24 AM.
Re: Driveshaft Length Help With Caltracs [Re: Scamp408] #1402900
03/16/13 10:34 AM
03/16/13 10:34 AM
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bean town ....Ca
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not saying this is right.. but I cut a half inch of a yoke one time and it worked fine. the old chopsaw did the trick. was this a bad idea


In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: Driveshaft Length Help With Caltracs [Re: Scamp408] #1402901
03/16/13 11:19 AM
03/16/13 11:19 AM
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State of confusion
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Mine`s a bit over a 1/2" and has been 4 years..........


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Driveshaft Length Help With Caltracs [Re: Scamp408] #1402902
03/17/13 12:41 PM
03/17/13 12:41 PM
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Quote:

Already have the axle 1in back but thanks. I think the yoke is the problem. I have a output shaft for a 727 handy and it only slides in so far,it doesnt bottom out. I also have an old mopar yoke and it bottoms out on both extra shaft and trans.I looked inside yoke but cant see any damage but it does fit tighter than the mopar one.



The splines arent twisted but down inside some may look weird I may have to rethink this all over because of this I may be to short.

Re: Driveshaft Length Help With Caltracs [Re: Scamp408] #1402903
03/17/13 03:24 PM
03/17/13 03:24 PM
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Mt Morris Michigan
mopar dave Offline
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Just got a new ds from dynotech. It measures 1.5 slip yoke clearance. Gave him all the measures.

Re: Driveshaft Length Help With Caltracs [Re: mopar dave] #1402904
03/17/13 03:32 PM
03/17/13 03:32 PM
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Scamp408 Offline OP
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Well im gunna order a new slip yoke and go from there. Now correct me if I am wrong should I push yoke in till it gently stops than pull out 3/4 to ? inches. I have a small seal not the boot.

Re: Driveshaft Length Help With Caltracs [Re: mopar dave] #1402905
03/17/13 03:36 PM
03/17/13 03:36 PM
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Polson, MT
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1.5" is too much. Slip yoke clearance should measure 3/4"-1".

Re: Driveshaft Length Help With Caltracs [Re: DoctorDiff] #1402906
03/17/13 03:48 PM
03/17/13 03:48 PM
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Hey doc how much for a good slip yoke

Re: Driveshaft Length Help With Caltracs [Re: DoctorDiff] #1402907
03/17/13 03:55 PM
03/17/13 03:55 PM
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Mt Morris Michigan
mopar dave Offline
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I think the tail shaft sticking out the case 1 1/4" may be the reason for this. The caltrac bars hold the dana from rotating so wheres the problem?

Re: Driveshaft Length Help With Caltracs [Re: Scamp408] #1402908
03/17/13 04:12 PM
03/17/13 04:12 PM
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Polson, MT
DoctorDiff Offline
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A forged steel 1350 727/833 slip yoke is $179

A forged steel 1350 pinion yoke is $70

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