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Driveshaft Length Help (and Slip Yoke)UPDATE
#1402889
03/15/13 06:05 PM
03/15/13 06:05 PM
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Joined: Feb 2005
Posts: 2,709
NJ central
Scamp408
OP
master
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OP
master
Joined: Feb 2005
Posts: 2,709
NJ central
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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 09:25 PM.
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Re: Driveshaft Length Help With Caltracs
[Re: Scamp408]
#1402890
03/15/13 06:24 PM
03/15/13 06:24 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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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
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Re: Driveshaft Length Help With Caltracs
[Re: Scamp408]
#1402892
03/15/13 06:36 PM
03/15/13 06:36 PM
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Joined: Jan 2003
Posts: 6,266
Renton Washington
Triple Threat
master
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master
Joined: Jan 2003
Posts: 6,266
Renton Washington
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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
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Re: Driveshaft Length Help With Caltracs
[Re: Scamp408]
#1402894
03/15/13 06:42 PM
03/15/13 06:42 PM
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Joined: Feb 2005
Posts: 2,709
NJ central
Scamp408
OP
master
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OP
master
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Posts: 2,709
NJ central
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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.
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Re: Driveshaft Length Help With Caltracs
[Re: Scamp408]
#1402896
03/15/13 09:46 PM
03/15/13 09:46 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
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
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Re: Driveshaft Length Help With Caltracs
[Re: MR_P_BODY]
#1402897
03/16/13 08:17 AM
03/16/13 08:17 AM
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Joined: Jan 2003
Posts: 2,922
A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,922
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
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Re: Driveshaft Length Help With Caltracs
[Re: Tig]
#1402898
03/16/13 09:36 AM
03/16/13 09:36 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
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
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Re: Driveshaft Length Help With Caltracs
[Re: MR_P_BODY]
#1402899
03/16/13 11:22 AM
03/16/13 11:22 AM
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Joined: Feb 2005
Posts: 2,709
NJ central
Scamp408
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NJ central
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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 11:24 AM.
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Re: Driveshaft Length Help With Caltracs
[Re: Scamp408]
#1402902
03/17/13 01:41 PM
03/17/13 01:41 PM
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Joined: Feb 2005
Posts: 2,709
NJ central
Scamp408
OP
master
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OP
master
Joined: Feb 2005
Posts: 2,709
NJ central
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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.
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Re: Driveshaft Length Help With Caltracs
[Re: mopar dave]
#1402914
03/18/13 04:44 PM
03/18/13 04:44 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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Quote:
I had 1 1/4" of shaft sticking out the end of the trans housing. if I had 1" of yoke to housing clearance the shaft would be bottomed out in the yoke or pretty close to it.
In this case I would slide yoke in till it bottoms out,now measure from center of cap to center of cap,then subtract 1" from your measurement.
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Re: Driveshaft Length Help With Caltracs
[Re: scratchnfotraction]
#1402915
03/18/13 05:57 PM
03/18/13 05:57 PM
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Joined: Feb 2005
Posts: 2,709
NJ central
Scamp408
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master
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OP
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Posts: 2,709
NJ central
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I measured it all up and I have aprox 1in give or take a little with my DS. I went to where I bought the shaft sometime ago and they say bottom yoke,pull out and inch than measure center to center. The newer yoke will not go in all the way but if I force it I am sure it would. I cant see any twisted splines but something is in there. The way it was I only had 1/2" of slip.
Last edited by scamp408; 03/18/13 05:58 PM.
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Re: Driveshaft Length Help With Caltracs
[Re: Scamp408]
#1402918
03/23/13 11:58 AM
03/23/13 11:58 AM
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Joined: Jan 2003
Posts: 1,855
Staten Island N.Y.
Dap
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,855
Staten Island N.Y.
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I twisted the spline in my 7290 yoke and replaced it with a MW 1350 yoke along with a new shaft.
PRH446
10.084 @ 135.21 mph N/A through chambered mufflers,3300lbs. Stock stroke wedge
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