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Re: Broke 727 Tailshaft... Why?
[Re: Mopar_Mike]
#359430
06/30/09 10:15 AM
06/30/09 10:15 AM
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Joined: Jan 2005
Posts: 716
Indiana
65dragnet
super stock
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super stock
Joined: Jan 2005
Posts: 716
Indiana
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Thanks ,I get a little windy. The torque strap is just limiting movement from side to side and not fore and aft.I don't have a pic of mine or I would show ya maybe some one else will chime in.
E. Williams 65 Coronet 500 3400lbs w/d, 446, Indy EZ'S, A&A transbrake,Comp 650 lift cam, 6.50 @ 105 mph 1/8th 10.25 @ 130mph 1/4
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Re: Broke 727 Tailshaft... Why?
[Re: DoctorDiff]
#359437
06/30/09 01:05 PM
06/30/09 01:05 PM
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Joined: Jan 2003
Posts: 4,288
Danville, NH
Mopar_Mike
OP
master
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OP
master
Joined: Jan 2003
Posts: 4,288
Danville, NH
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Quote:
Make sure your pinion angle is derived from the TRANSMISSION CENTERLINE, not the driveshaft.
In other words, make your pinion parallel to the transmission as a base line, then roll the pinion downward (ie. 4) degrees. The purpose of pinion angle is to insure the pinion centerline is parallel to the transmission centerline when the vehicle is under power.
Too much negative pinion angle can cause the U-joints to bind on deceleration. Not enough negative pinion angle can cause the U-joints to bind on acceleration.
Yes, thanks Doc. That was my next question. How to set it up. I changed my response, I see what you mean now. Thanks for your help!
But just to reiterate:
If my transmission angle is 3 degrees + I should adjust my pinion angle to the same 3 degrees. And in this case, at this point, I should turn my pinion down 3 degrees to get the optimal 3 degrees - angle.
Question: When I see the angles are different, as I am sure they will be.. How do I get the pinion to match the transmission angle to start with a baseline.
In the case above, If the trans is 3 degrees + should I just set the pinion to 6 degrees - ?
Last edited by Mopar_Mike; 06/30/09 01:24 PM.
RS23L7 4-Speed
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Re: Broke 727 Tailshaft... Why?
[Re: Mopar_Mike]
#359438
06/30/09 01:43 PM
06/30/09 01:43 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Quote:
mike did you brake the tail housing like the pic turner posted or did you break it by where it bolts onto the trans case?
Its actually a small hairline crack that starts at the speedometer opening and up over and around housing. After a couple runs I was seeing smoke from the trans fluid dripping on the exhaust. Thought it was a bad O ring for the speedo cable. It was not.. I actually made a couple more runs too..  ... 
When mine let it was on a 12.12 pass. I think it went when I hit 3rd because that's when I smelled smoke. Got back to the pits and I thought the seal had broke to so I checked the level it was only a tad low so I drove it home. The only time I notced leakage was when I nailed it. I got under there w/ a light and noticed it wasn't the seal and it was "bleeding" from the case.
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Re: Broke 727 Tailshaft... Why?
[Re: Mr.Yuck]
#359439
07/01/09 01:38 PM
07/01/09 01:38 PM
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Joined: Jan 2003
Posts: 4,288
Danville, NH
Mopar_Mike
OP
master
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OP
master
Joined: Jan 2003
Posts: 4,288
Danville, NH
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I measured my driveshaft.. I have 1" 1/16" play from the shaft being bottomed out to where it bolts to the rear yoke. Is this a big enough distance that I should have it shortened?
Thanks.
RS23L7 4-Speed
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