2nd Gen Non-Engine/Transmission All Shook Up!

[EDembowski]

I need some advice on how to fix a shaking truck. It will bounce like you're on a spring board betwen 45-50 mph, then when I hit 65-75 mph it starts to shake. I'm guessing that it's just a more pronounced bounce like at 45-50, steering wheel is not effected, but it's driving me nuts.

Now for the history, I've had the tires Road Force Balanced, Centramatics, new track bar, new front shocks, new center support bearing, alignment, all front end components are tight as far as I can tell.

If anybody knows what could cause this Please Help, I can't continue chasing my tail. Thanks in advance

Eric

 

[dieseldon02]

Check the driveshaft balance????

 

[ttbird]

check u joints, carrier bearing. How many miles on the truck?

 

[Glock Guru]

I would also say u-joints!



-Troy

 

[RAJohnson]

Hows the front end alignment?? Caster

 

[EDembowski]

Caster might be a little short, since I put the D25's on. Would that be causing a "Caster Shimmy" that I'm mistaking for a shake? U-joints were my next guess, I've already replaced the Carrier bearing. Thanks for all your help, I would like to take it to a shop, but I think they would just be throwing darts to figure it out, and still end up costing a bunch of money.

 

[BK]

What happens when you get it up on jack stands? Can you see it in the drive shaft?

A run out problem on a tire/rim?

 

[RSimmons]

I have the same problem and I am thinking it is the rear driveshaft splined coupler. Mine appears to have about twice as much slop or slack when compared to the front shaft coupler. I'll pull it out next week and get it into the machine shop and see what they think.

 

[EDembowski]

Adjusting the caster seemed to help quite a bit, I'm still getting a little vibration and the caster is adjusted as far as it will go. Would longer control arms help? I'm probably going to get the driveshaft checked, anyone have an idea on how much that would cost$$$$?

This forum has been a great help, well worth the $$ for membership.

 

[BK]

I think any drive shaft shop worth their salt will look at the drive shaft, off the truck, for free, knowing they would get the work if something is wrong.

Long control arms would help. Most 3" lifts come with them.

 

[Devildog]

I would say that it's the front steering stabilizer shock but you don't feel it in the steering wheel. I could be that your tires are out of round, If that's the case find a tire store with a tire lathe to clean them up.

 

[EDembowski]

I just replaced the steering stabilizer. Would out of round tires only do it at certain speeds? The truck rides very smooth other than the two speeds where it shakes. This is driving me nuts and broke trying to figure this out. :{

 

[BK]

yes run out on the tire or wheel , or being out of balance too...

 

[McLaughlin]

I need some advice on how to fix a shaking truck. It will bounce like you're on a spring board betwen 45-50 mph, then when I hit 65-75 mph it starts to shake. I'm guessing that it's just a more pronounced bounce like at 45-50, steering wheel is not effected, but it's driving me nuts.

Now for the history, I've had the tires Road Force Balanced, Centramatics, new track bar, new front shocks, new center support bearing, alignment, all front end components are tight as far as I can tell.

If anybody knows what could cause this Please Help, I can't continue chasing my tail. Thanks in advance

Eric :{

Suggest you check the tie rod ends and ball joints really close. My daughter had an almost identical problem which we traced to a loose tie rod end. She had taken it in to a shop for something and they told her the tie rods need to be replaced. When I took a look her truck, I removed the ball stud nut from the tie rod end at the tire and the ball stud/tie rod assembly fell to the ground. Apparently, the ball stud nut hadn't been torqued correctly and was loose. Rebuilt the tie rods with Luke's Links and after reassembling, the problem hasn't reoccurred.

 

[EDembowski]

Well, it took me going to a different state to get this problem fixed.

Match Balance on a Road Force Balancer was the key. Oo. Oo.

Before this I have taken it to supposed "big truck tire specialists" in an attempt to get them balanced but they never seemed to correct it. So that led me to chasing other things I thought it might have been.

After talking to one of the service managers at Merchant tire in Cary, NC I got the feeling they knew what they were doing (even though it's a chain), in other words their tire guy wasn't just sweeping floors last week.

$21 later no more shake. He told me one tire was 10 oz out, even more than the Centramatics can compensate for.

If your truck shakes, give it a try. take it to a shop that does Road Force Balancing, and make sure they rotate the tire on the rim (Match Balance) if it is way out. Don't take the "I got it as close as I could" excuse. The other shops I've taken it to all used Road Force Balancing, I don't know if it's ignorance or laziness but none of them took the time to do it right

Well I'm done ranting and raving. All the other places I took it to can kiss my A__