Re: Driveshaft danger?
[Re: MoparJ]
#2257774
02/22/17 03:24 PM
02/22/17 03:24 PM
|
Joined: Feb 2008
Posts: 992 Simi Valley, CA
MoparJ
OP
super stock
|
OP
super stock
Joined: Feb 2008
Posts: 992
Simi Valley, CA
|
Just confirmed that the driveshaft was not high speed tested. It was only taken to about 500-700 RPM and brought in to no worse that .005-.007” runout.
I am beginning to look at having a 3”, .0083” wall thickness, driveshaft built, that is .750” longer on the body to get more engagement in the trans.
2016 Ram 1500 Crew Cab: 5.7, 65RFE, 4.56 gears with locker, Hemifever tuned, AFE intake, 87mm throttle body, JBA headers, 3" Flowmaster exhaust, split to dual 2.5" exits. 13.57 best ET so far.
Searching for new A or B Body Project!
|
|
|
Re: Driveshaft danger?
[Re: MoparJ]
#2257938
02/22/17 10:36 PM
02/22/17 10:36 PM
|
Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
|
I am beginning to look at having a 3”, .0083” wall thickness, driveshaft built, that is .750” longer on the body to get more engagement in the trans. I would butt the yoke you plan to use all the way into the trans then measure the C to C you have at that point then subtract 3/4 from that dimention & this is with the suspension loaded (axle on stands). give that number to your shop. EDIT I would locate the front/rear axle position first & I like to have the bottom of the rear shackles point slightly rearward so that the springs "work" when they are compressed when you get on it as opposed to raising the car when the springs arc over center which they do if the bottom is pointing forward from "vertical". keep an eye on shock fitment when you change that position.
Last edited by RapidRobert; 02/23/17 02:18 AM. Reason: more info
live every 24 hour block of time like it's your last day on earth
|
|
|
Re: Driveshaft danger?
[Re: RapidRobert]
#2258057
02/23/17 02:20 AM
02/23/17 02:20 AM
|
Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
|
About to go away
Joined: Sep 2007
Posts: 14,889
up yours
|
I would butt the yoke you plan to use all the way into the trans then measure the C to C you have at that point then subtract 3/4 from that dimention & this is with the suspension loaded (axle on stands). give that number to your shop. That is pretty much how the DC books say to do it. As fro finding the angles, I have two of these I use.
Last edited by Supercuda; 02/23/17 02:22 AM.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
|
|
|
Re: Driveshaft danger?
[Re: Supercuda]
#2258061
02/23/17 02:28 AM
02/23/17 02:28 AM
|
Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
|
I have bought from that eBay shipper "Zoro", no issues. Definitely get a digital one as opposed to a cheapie with a magnet & gravity needle.
live every 24 hour block of time like it's your last day on earth
|
|
|
Re: Driveshaft danger?
[Re: MoparJ]
#2258092
02/23/17 05:15 AM
02/23/17 05:15 AM
|
Joined: Feb 2008
Posts: 992 Simi Valley, CA
MoparJ
OP
super stock
|
OP
super stock
Joined: Feb 2008
Posts: 992
Simi Valley, CA
|
Uppn more measuring, the body of the driveshaft definitely needs to grow 3/4" to be right. Should have a new DS tomorrow.
2016 Ram 1500 Crew Cab: 5.7, 65RFE, 4.56 gears with locker, Hemifever tuned, AFE intake, 87mm throttle body, JBA headers, 3" Flowmaster exhaust, split to dual 2.5" exits. 13.57 best ET so far.
Searching for new A or B Body Project!
|
|
|
Re: Driveshaft danger?
[Re: MoparJ]
#2258223
02/23/17 03:23 PM
02/23/17 03:23 PM
|
Joined: Feb 2008
Posts: 992 Simi Valley, CA
MoparJ
OP
super stock
|
OP
super stock
Joined: Feb 2008
Posts: 992
Simi Valley, CA
|
Using a bigger 3” driveshaft, am I still okay to use the same 4 bolts and caps for the rear yoke? They are all in good shape.
2016 Ram 1500 Crew Cab: 5.7, 65RFE, 4.56 gears with locker, Hemifever tuned, AFE intake, 87mm throttle body, JBA headers, 3" Flowmaster exhaust, split to dual 2.5" exits. 13.57 best ET so far.
Searching for new A or B Body Project!
|
|
|
Re: Driveshaft danger?
[Re: Cab_Burge]
#2258325
02/23/17 09:08 PM
02/23/17 09:08 PM
|
Joined: Feb 2008
Posts: 992 Simi Valley, CA
MoparJ
OP
super stock
|
OP
super stock
Joined: Feb 2008
Posts: 992
Simi Valley, CA
|
As log as your keeping the same size U joints your good on the straps and bolts Do NOT over tighten them No sir on over tightening; it is bashed into my brain from testing and design with fasteners as part of my every day gig. The ujoints will be the same. Specified to the builder that the rear yoke WILL NOT be changing and he is going to work around that.
2016 Ram 1500 Crew Cab: 5.7, 65RFE, 4.56 gears with locker, Hemifever tuned, AFE intake, 87mm throttle body, JBA headers, 3" Flowmaster exhaust, split to dual 2.5" exits. 13.57 best ET so far.
Searching for new A or B Body Project!
|
|
|
Re: Driveshaft danger?
[Re: MoparJ]
#2258331
02/23/17 09:17 PM
02/23/17 09:17 PM
|
Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
|
Uppn more measuring, the body of the driveshaft definitely needs to grow 3/4" to be right. Should have a new DS tomorrow. Are you going by rear ujoint endplay (I hope so) or by front yoke appearance/it's end play?
live every 24 hour block of time like it's your last day on earth
|
|
|
Re: Driveshaft danger?
[Re: RapidRobert]
#2258344
02/23/17 09:28 PM
02/23/17 09:28 PM
|
Joined: Feb 2008
Posts: 992 Simi Valley, CA
MoparJ
OP
super stock
|
OP
super stock
Joined: Feb 2008
Posts: 992
Simi Valley, CA
|
Uppn more measuring, the body of the driveshaft definitely needs to grow 3/4" to be right. Should have a new DS tomorrow. Are you going by rear ujoint endplay (I hope so) or by front yoke appearance/it's end play? In the existing form, there was 1.5-1.75” of slip yoke exposed with the driveshaft installed. Pushing the shaft all of the way into the trans then backing out .750”-1” left about .500-.750” of slip yoke exposed. .750” longer on the body should push the slip yoke into the trans .750” further.
Last edited by MoparJ; 02/23/17 09:29 PM.
2016 Ram 1500 Crew Cab: 5.7, 65RFE, 4.56 gears with locker, Hemifever tuned, AFE intake, 87mm throttle body, JBA headers, 3" Flowmaster exhaust, split to dual 2.5" exits. 13.57 best ET so far.
Searching for new A or B Body Project!
|
|
|
Re: Driveshaft danger?
[Re: MoparJ]
#2258351
02/23/17 09:44 PM
02/23/17 09:44 PM
|
Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
|
Pushing the shaft all of the way into the trans then backing out .750”-1” I would suggest .750" max (springs loaded)
live every 24 hour block of time like it's your last day on earth
|
|
|
Re: Driveshaft danger?
[Re: RapidRobert]
#2258365
02/23/17 10:21 PM
02/23/17 10:21 PM
|
Joined: Feb 2008
Posts: 992 Simi Valley, CA
MoparJ
OP
super stock
|
OP
super stock
Joined: Feb 2008
Posts: 992
Simi Valley, CA
|
Pushing the shaft all of the way into the trans then backing out .750”-1” I would suggest .750" max (springs loaded) Yep, .750" additional length is the max and what I specified, to be safe and conservative. The additional diameter of the driveshaft and the extra engagement should help eliminate the driveshaft from the potential problem list, even if this doesnt solve the issue. I do believe it will though.
2016 Ram 1500 Crew Cab: 5.7, 65RFE, 4.56 gears with locker, Hemifever tuned, AFE intake, 87mm throttle body, JBA headers, 3" Flowmaster exhaust, split to dual 2.5" exits. 13.57 best ET so far.
Searching for new A or B Body Project!
|
|
|
Re: Driveshaft danger?
[Re: MoparJ]
#2258392
02/23/17 11:21 PM
02/23/17 11:21 PM
|
Joined: Feb 2008
Posts: 992 Simi Valley, CA
MoparJ
OP
super stock
|
OP
super stock
Joined: Feb 2008
Posts: 992
Simi Valley, CA
|
Checked the front yoke and all seems well for now. I'll pull it apart later if I need to.
New ujoints in the same number and size as the 2.750 inch are being added onto the 3 inch unit.
2016 Ram 1500 Crew Cab: 5.7, 65RFE, 4.56 gears with locker, Hemifever tuned, AFE intake, 87mm throttle body, JBA headers, 3" Flowmaster exhaust, split to dual 2.5" exits. 13.57 best ET so far.
Searching for new A or B Body Project!
|
|
|
Re: Driveshaft danger?
[Re: J_BODY]
#2259099
02/25/17 03:43 AM
02/25/17 03:43 AM
|
Joined: Feb 2008
Posts: 992 Simi Valley, CA
MoparJ
OP
super stock
|
OP
super stock
Joined: Feb 2008
Posts: 992
Simi Valley, CA
|
UPDATE: new 3" shaft is in. Engagement into transmission is improved. Pinion angle is good. Same issue is still there.
Drove it more tonight and even felt that minor soft vibration between 35-40. Drove it in 3rd at highway speed and couldn't tell if its still there, due to increased engine vibes. Starting to feel this more from the fron, maybe something in the OD gear wearing, or elsewhere in the trans. Maybe those new motor mounts are not the best at dampening harmonics? I am going to check the wheel bearings in the front.
At least the driveshaft is now eliminated from potential issue list.
2016 Ram 1500 Crew Cab: 5.7, 65RFE, 4.56 gears with locker, Hemifever tuned, AFE intake, 87mm throttle body, JBA headers, 3" Flowmaster exhaust, split to dual 2.5" exits. 13.57 best ET so far.
Searching for new A or B Body Project!
|
|
|
Re: Driveshaft danger?
[Re: MoparJ]
#2259126
02/25/17 10:21 AM
02/25/17 10:21 AM
|
Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
|
About to go away
Joined: Sep 2007
Posts: 14,889
up yours
|
And have we checked pinion angles yet?
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
|
|
|
Re: Driveshaft danger?
[Re: Supercuda]
#2259225
02/25/17 01:12 PM
02/25/17 01:12 PM
|
Joined: Feb 2008
Posts: 992 Simi Valley, CA
MoparJ
OP
super stock
|
OP
super stock
Joined: Feb 2008
Posts: 992
Simi Valley, CA
|
And have we checked pinion angles yet?
It verified right in line upon measuring everything up. Angle is good.
2016 Ram 1500 Crew Cab: 5.7, 65RFE, 4.56 gears with locker, Hemifever tuned, AFE intake, 87mm throttle body, JBA headers, 3" Flowmaster exhaust, split to dual 2.5" exits. 13.57 best ET so far.
Searching for new A or B Body Project!
|
|
|
|
|