Unbalanced driveshaft
#1
Unbalanced driveshaft
We've gone through pretty much every other option as to the vibration on take off and other high torque situations and have pretty much settled on the the driveshaft as the issue. I added traction bars recently thinking that the old leaf springs just aren't up to the job anymore. That seems to have helped some but it's still there. We've gone through the rear diff also and that's good. I'm looking at options for replacement of the shaft. What are the current thoughts on one piece shafts? Is aluminum the better option? Who to buy from, etc.? Any suggestions?
#3
as we enter into the heat of summer...seems like there are more and more case of shudder, vibrations, and funny drive train noises happening......hmmm...my personal opinion is that the thin LV fluid we all were told was OK to put into the torque shift cant live up to the task.....at least not on older worn out trannies. my shudder problems reduced substantially when I did a drain and refill using Mercon SP, and the shudder was eliminated when I added 16 onuces of "RED" container Lubeguard. The Lubeguard bottle says its the only additive "OK'ed" by OEM's. Lubeguard helps restore the plate slip that is needed to have smooth shift power transfers. I am not a tranny expert but before you start replacing drive shaft componets and adding sway and traction bars...invest in the 13 bucks and give it a shot. you can get it on amazon. lubeguard comes in 4 types, depending on the tranny type. RED, BLACK, GREEN and SILVER. the SILVER is supposed to be good for all trannies BUT it does not work as well as the specifc target product like using RED for our trannies.
and sure...this cure may be masking a problem like seloniods that arent functioning correctly or sensors and such that are not working correctly....you decide how you want to proceed based on cost and return on investment.
and sure...this cure may be masking a problem like seloniods that arent functioning correctly or sensors and such that are not working correctly....you decide how you want to proceed based on cost and return on investment.
#4
Is the carrier bearing the center support bearing? If so, we just replaced it and it made it worse.
#5
as we enter into the heat of summer...seems like there are more and more case of shudder, vibrations, and funny drive train noises happening......hmmm...my personal opinion is that the thin LV fluid we all were told was OK to put into the torque shift cant live up to the task.....at least not on older worn out trannies. my shudder problems reduced substantially when I did a drain and refill using Mercon SP, and the shudder was eliminated when I added 16 onuces of "RED" container Lubeguard. The Lubeguard bottle says its the only additive "OK'ed" by OEM's. Lubeguard helps restore the plate slip that is needed to have smooth shift power transfers. I am not a tranny expert but before you start replacing drive shaft componets and adding sway and traction bars...invest in the 13 bucks and give it a shot. you can get it on amazon. lubeguard comes in 4 types, depending on the tranny type. RED, BLACK, GREEN and SILVER. the SILVER is supposed to be good for all trannies BUT it does not work as well as the specifc target product like using RED for our trannies.
and sure...this cure may be masking a problem like seloniods that arent functioning correctly or sensors and such that are not working correctly....you decide how you want to proceed based on cost and return on investment.
and sure...this cure may be masking a problem like seloniods that arent functioning correctly or sensors and such that are not working correctly....you decide how you want to proceed based on cost and return on investment.
#6
Also, I wouldn't call mine a "first gear clunk". It's really like I'm driving on tractor tires as I start off and will stay that way for several seconds if I accelerate hard. Hince my thought that it was "wheel hop" and might be cured by the traction bars.
#7
as we enter into the heat of summer...seems like there are more and more case of shudder, vibrations, and funny drive train noises happening......hmmm...my personal opinion is that the thin LV fluid we all were told was OK to put into the torque shift cant live up to the task.....at least not on older worn out trannies. my shudder problems reduced substantially when I did a drain and refill using Mercon SP, and the shudder was eliminated when I added 16 onuces of "RED" container Lubeguard. The Lubeguard bottle says its the only additive "OK'ed" by OEM's. Lubeguard helps restore the plate slip that is needed to have smooth shift power transfers. I am not a tranny expert but before you start replacing drive shaft componets and adding sway and traction bars...invest in the 13 bucks and give it a shot. you can get it on amazon. lubeguard comes in 4 types, depending on the tranny type. RED, BLACK, GREEN and SILVER. the SILVER is supposed to be good for all trannies BUT it does not work as well as the specifc target product like using RED for our trannies.
and sure...this cure may be masking a problem like seloniods that arent functioning correctly or sensors and such that are not working correctly....you decide how you want to proceed based on cost and return on investment.
and sure...this cure may be masking a problem like seloniods that arent functioning correctly or sensors and such that are not working correctly....you decide how you want to proceed based on cost and return on investment.
Last edited by DieselVol; 07-23-2016 at 03:12 PM. Reason: Put the wrong part number in
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#9
I think your problem used to be called "crew cab clunk". Back in the day, it was blamed on the long drive shaft required by the long cab. We all just got used to it as it was just thought to be "nature of the beast". That may have been updated by another idea.
#10
Are your ujoints "in phase"?
What Every Shop Must Know about Drivelines
Proper U-Joint Installation TipsBehling Racing Equipment
A couple of links for some reading
#11
Just a couple of questions........Are all of your angles good; i.e. Driveshaft and pinion shaft aligned?
Are your ujoints "in phase"?
What Every Shop Must Know about Drivelines
Proper U-Joint Installation TipsBehling Racing Equipment
A couple of links for some reading
Are your ujoints "in phase"?
What Every Shop Must Know about Drivelines
Proper U-Joint Installation TipsBehling Racing Equipment
A couple of links for some reading
#12
At O'Reiley's autoparts, I found the synthetic red version. I put 16 oz in, drove about 50 miles, and noticed no difference. I'll reassess tomorrow, but I'm thinking this isn't going to fix it.
#13
Doesn't sound like a tranny issue. Did your mechanic lube the spline shaft generously when re-attaching? If dry, you'll get some of the same charateristics you're complaining about.
Check your rear tranny mount to ensure its secure.
Last, I bet one of your tires could be delaminating. Sometimes very hard to see but easy to feel. Rotate the tires and see if there's any difference?
I wouldn't waste the money, chasing after a new driveshaft if the u joints and carrier bearing were just replaced.
They don't bend by themselves...unless you did some off-roading and got hung up on the driveshafts?
Check your rear tranny mount to ensure its secure.
Last, I bet one of your tires could be delaminating. Sometimes very hard to see but easy to feel. Rotate the tires and see if there's any difference?
I wouldn't waste the money, chasing after a new driveshaft if the u joints and carrier bearing were just replaced.
They don't bend by themselves...unless you did some off-roading and got hung up on the driveshafts?
#15