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fastyz400
Dodge Dakota
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8/11/2004
23:16:02

Subject: RE: Drivetrain Vibration
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OK, a little update.

Just got the aluminum driveshaft back and installed. Now, i have about 5% vibration left.

Have the new drums. Gonna try those this weekend and double check if my axles are bent. Jack the car up on stands and run it without the drums. See, how true the axle spins.

I think i'm almost there.

It's so close. Below are my a quick reference of my Roller coaster Ride:
1. Most of the problem was in my egg shaped tires (Replaced with a set of Michilens LTX) 70-80% better
2. Driveshaft was really messed up. Replaced with Aluminum. Improved even more.
3. Driver side wheel bearing made a squeek when axles was up on jack stand (replaced) made no difference but replaced both wheel bearings.




DSW
Dodge Dakota
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8/12/2004
01:06:36

RE: Drivetrain Vibration
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Here's another thing to check. With the truck in nuetral bring the RPM's up slowly from idle to 5K. Do this a couple times and slow enough so you can notice a vibration at a specific RPM.

The owner of the shop that built my aluminum driveshaft did this test and everything was OK. He said if a vibration can be felt with this test it could indicate that the torque convertor is out of balance. Makes sense, big'ol 20# convertor swinging around could make some vibration if it's out of balance.

If you only have 5% vibration left it could be the tires, even if they are new. I am real anal about having a smooooth riding truck and have taken my truck back because the tire guy didn't do a real good job of balancing the tires. If they are in a hurry, they will spin the tire up, peg on a weight and call it a done deal without rechecking the balance after adding the weight. I bet 50% of the time I have the tires balanced at least one of them is out of balance, if not multiples.

It's pretty funny telling the tire guy that the back left tire is out of balance and watching his reaction of disbelief. "What? how do you know it's the back left tire!" They check the back left tire,,, what do you know,, it's out of balance. LOL

Have them recheck the balance of the tires when they are real slow. Give 'em a ring and ask how busy they are. If they are swamped, forget about having the tires rebalanced.



fastyz400
Dodge Dakota
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8/12/2004
02:12:23

RE: Drivetrain Vibration
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DSW,

With the Truck in Nuetral, i have already revved the engine to 5 grand. Nothing. So, i am certain, the Torque Converter is ok.

The vibration is almost like a hop. very faint during accerleration at 30-40mph then a heavier at 60+ during mild acceleration.

What i have found on the net. It could be my transmission fuild breaking down and allowing the clutch to slip inside the autotrans. I live in Phoenix, so that 115 deg weather doesn't help the fluid any. lol

So, i will be replacing it with ATF+4, even though my manual calls for ATF+3.



fastyz400
Dodge Dakota
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8/12/2004
02:35:49

RE: Drivetrain Vibration
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Oh, an added note:

According to the post i have read pertaining to Vibrations comming from the Tranny. Due to bad Trans fluid.

2 possibilies may arrise: Keep in mind that, this is if your fluid is not in bad shape or wrong fluid type.

slow speed: Below 40mph (torque converter lockup is not present) caused by trans clutch slipping

high speed: Over 40+ computer senses slippage, thus engaging and disengaging the torque converter very quickly. Thus, causing a hop off and on. You won't notice a RPM change because, this happens very fast. I forget like 140 times a minute or second? hmm. i forgot.

Anyway, this is another item on the Roller Coaster Ride. I should open a theme park called "Vibration in my Balls" lol



DSW
Dodge Dakota
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8/12/2004
03:11:45

RE: Drivetrain Vibration
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I'v heard that the trans can cause a vibration like you described, anything's possible, I think I'v heard it called torque convertor shutter, never experienced it though.

My Dak manual also said ATF+3??? After doing a trans service I went into the Dodge parts department for something and the parts guy said ATF+4 was supposed to be in the trans,,, AWWWWW WTF! I ran it for 20K with the ATF+3 and then flushed the tranny with Amsoil Universal ATF since it was cheaper than ATF+4 ($7/qt) at the time.





fastyz400
Dodge Dakota
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8/12/2004
04:10:20

RE: Drivetrain Vibration
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lol DSW,

The parts guys at the dodge dealers are Dumb A$$es. If, you have a 2000 look in your manual. It specifies ATF+3. They started the ATF+4 in 2001 models. ATF+4 is synthetic. ATF+3 is not.

But, I bet the only reason why they want to sell you that ATF+4 is because, they are forcing your to sell your kidney for a bottle of it. lol



fastyz400
Dodge Dakota
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8/12/2004
12:01:29

RE: Drivetrain Vibration
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hmmm,

The ATF+4 has really come down in price over at Dodge.

A quart $4.35
1 gallon $16

I think i will go with the ATF+4



Pittdawg
Dodge Dakota
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8/12/2004
13:21:07

RE: Drivetrain Vibration
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ATF+4 is superior to ATF+3, they are recommending everyone put +4 even in the older trans that call for +3



DSW
Dodge Dakota
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8/12/2004
13:44:40

RE: Drivetrain Vibration
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Yup, I agree about the dumbazz comment. I just put in the ATF+3 and was damned if I was going to drain it to refill the trans with ATF+4 when the owners manual said ATF+3. Heck, if it was good enough to put in the truck from the factory it's good enough for a service.

ATF+4 is alot better than ATF+3, I am glad to see that DC dropped the price and isn't totally screwing thier customers by selling their proprietary AFT at $7-8 a quart.

If I was under warranty I would be sticking with ATF+4. The price drop even looks instersting as it'a cheaper than Amsoil ATF now, but I'll stick with the Amsoil since my trans is still running good at 135K with the Amsoil.



fastyz400
Dodge Dakota
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8/12/2004
20:29:34

RE: Drivetrain Vibration
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WAAAAAAAAAAAAAA HOOOOOOOOOOOOOOOOO
Bah Bah Bah WEEEEEEEEEEEEEEEEEEEEE.

That's it. My Car is free of vibrations. The hopping sensation is free and gone. The problem was with the Transmission Fluid. Added the additive from Napa and ATF+4. Reset the computer. Drove it for about 50 miles making the transmission shift in and out and on the highway locking in and out of overdrive.

The more i drove the better it got, until it was completly gone.

Dam, I'm good.



ken U
Dodge Dakota
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9/26/2018
20:37:50

RE: Drivetrain Vibration
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Had a bad vehicle vibration on my 2006 Dodge Dakota.replaced both universal joints didn't help.Replaced front drive shaft. didn't help. checked calipers on front,not binding,checked rears and they were full of brake dust. pressure washed rear brakes to clean out. no more vibration drives smooth as glass at any speed.




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