Trans Finally gave up the Ghost today.
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From: DFW
And Huitt, there's a good driveline shop near 183 and 35. Not sure if its still open or not tho. They do heavy truck driveshafts. They did my old roomate's cut and custom U joint perch after he swapped a SRT axle in his regular cab hemi
Last edited by Patman; Jun 19, 2011 at 04:38 PM.
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I don't know the math, but maybe I should figure out where the 6K RPM limit will be achieved.
4.11 rear gear.
Last edited by Jetpilot2; Jun 19, 2011 at 05:16 PM. Reason: Wrong gear
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From: DFW
http://www.math-prof.com/Auto/Differential.aspx
overdrive on your truck is .70:1
in 3rd you'd have to do 141mph at 1:1 to get the driveshaft to 6k
and in 4th (OD) you'd have to do a hair over 200 to get the driveshaft to 6k
overdrive on your truck is .70:1
in 3rd you'd have to do 141mph at 1:1 to get the driveshaft to 6k
and in 4th (OD) you'd have to do a hair over 200 to get the driveshaft to 6k
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http://www.math-prof.com/Auto/Differential.aspx
overdrive on your truck is .70:1
in 3rd you'd have to do 141mph at 1:1 to get the driveshaft to 6k
and in 4th (OD) you'd have to do a hair over 200 to get the driveshaft to 6k
overdrive on your truck is .70:1
in 3rd you'd have to do 141mph at 1:1 to get the driveshaft to 6k
and in 4th (OD) you'd have to do a hair over 200 to get the driveshaft to 6k
I think I'll be okay, but we'll have to see actual results.
Last edited by Jetpilot2; Jun 20, 2011 at 06:09 AM.
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I ordered a one-piece shaft from DS Specialist before I left. It will be a year before it's installed and tested.
It will be a 5" diameter aluminum shaft with 1-ton u-joints. There is a 6K RPM rating on the shaft. They estimated I would have to be doing about 130 mph in OD, give or take. They also said the 6K limit would have to be exceeded for an extended period of time. A few seconds at 6K should not be a problem, but I shouldn't be hitting those numbers. I guess I'll be the guinea pig, but you'll have to wait a long time for a report.
Regarding angles, the truck is lowered so the angle is reduced. I will have to adjust my pinion angle from the two piece, but I already have that ability.
Stay tuned...
It will be a 5" diameter aluminum shaft with 1-ton u-joints. There is a 6K RPM rating on the shaft. They estimated I would have to be doing about 130 mph in OD, give or take. They also said the 6K limit would have to be exceeded for an extended period of time. A few seconds at 6K should not be a problem, but I shouldn't be hitting those numbers. I guess I'll be the guinea pig, but you'll have to wait a long time for a report.
Regarding angles, the truck is lowered so the angle is reduced. I will have to adjust my pinion angle from the two piece, but I already have that ability.
Stay tuned...
good luck with that.. ask pat i battled it for many years trying to stick with a single shaft.. 2 piece is the way to go for high speeds.. the limits for a 1 piece is 59" no matter the diameter.. any longer and you get whipping which is what causes the vibrations.
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BTW, what were the specs. of the different shafts you tried and by who? Were they all DS Specialist or many vendors?
Last edited by Jetpilot2; Jun 21, 2011 at 04:53 AM.
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http://www.math-prof.com/Auto/Differential.aspx
overdrive on your truck is .70:1
in 3rd you'd have to do 141mph at 1:1 to get the driveshaft to 6k
and in 4th (OD) you'd have to do a hair over 200 to get the driveshaft to 6k
overdrive on your truck is .70:1
in 3rd you'd have to do 141mph at 1:1 to get the driveshaft to 6k
and in 4th (OD) you'd have to do a hair over 200 to get the driveshaft to 6k
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From: Virginia Beach, VA
Engine speed and drive shaft speed are going to be two different things. The drive shaft is not going to be turning 6,000 rpm at different speeds because the overdrive ratio only affects the speed of the crankshaft, not the drive shaft. The drive shaft speed is going to be a direct correlation to vehicle speed. Engine speed is going to be irrelevant. The only factors that enter into this calculation are tire diameter and rear end gear ratio. I figure that you'd hit a drive shaft speed of 6,000 rpm at about 153 mph. At 200 mph, the drive shaft would be spinning at 7,843 rpm, if it held together. I think it's safe to say you won't hit 153 mph under any circumstances.
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