FIRST TEST DRIVE COMPLETE!!!! 800HP CUMMINS OFFICIALLY RIPS!!! 

Torque converter to pump engagement! I had the same issue and chased it the same way he is. Didn't get fixed until the torque converter hub disintegrated! Swapped pump and a new converter and good to go!

I'm convinced RU-vidr's keep energy drink companies in business...

So when are we going to talk about what’s sitting beside the Pete lol

Similar vibration issue - I had a brand new 2018 F-350 SRW 6.7L Powerstroke Crewcab short bed. I had a very similar vibration start after 1.5 months owning it, only in overdrive, started at 72mph gone at 77mph, worst at 75mph. Ford had the truck for over a year. They put 3 driveshafts in it, tried 4 other sets of wheels and tires off trucks in their lot, a whole new rear axle assembly, full new exhaust system, torque checked all frame and drivetrain bolts/nuts, and did a neutralization of exhaust and drivetrain components (put it on a frame stand nice and level, loosen all bolts/nuts, let it sit for a bit, then retighten and torque everything back together, its a common deal in Class 6, 7, 8 truck land), multiple sensors placed all over the truck, multiple Ford engineers I wasn't allowed to talk to flown in. ALL OF THAT did not fix the issue, both myself and the dealers transmission tech said it was the 6th gear (overdrive) planetary set from early on, but Ford would not allow/cover the dealers costs to tear into/investigate my transmission. The short of the long, Ford bought it back under Lemon Law after a couple month battle after all the above was done, never looking at the transmission. The way you describe his vibration makes me think of the exact issue I had, so thought I would share as food for thought. As a wrap up to the above story with the Ford, I'm now in a 2017 Ram 2500 6.7L Cummins Megacab short bed with a G56! It had under 12,000 miles when I bought it almost a year ago to this post. The owner already had some parts fall off in Mexico and did a couple other small things (level, wheels/tires). I've got just over 29,000mi on the clock as of this post and could only be happier if I could find my personal OG 2002 7.3L Powerstroke. Keep up the good work Greg!

The OG tow pig sounds so damn mean Greg! LET HER EAT!!lol

Looks so good lifted and love the exhaust even more without the muffler 😍

I’m gonna have to say that truck is my second favorite lol the dually is my favorite by far

Watching you row those gears and hearing the amazing exhaust sound made me so excited to get my first diesel. I am planning on an 06-07.5 6speed so I don’t have to try and find someone to help me get the exhaust to sound good.

Looks good man. Proud to see a smile on your face. Its like having a new truck all over again

The OG of OG’s is back in action and she rips the ‘08 is probably my favorite truck out of the bunch

Tuesday birthday here. Love the 08, keeps me coming back

Awesome awesome video Greg A, the 08 sounds so wicked and it’s fast, and powerful, and smooth. So glad to see the OG 08 back in full action again! Finally got silent mikes Dually back in action, transmission pressures looked good. The vibration issue is still there after 82 mph, would normally say maybe the rear yoke on the rear drive shaft would be bad causing the vibration, I had a bad one on my 04.5 and I could feel the vibration from where I was sitting in the drivers seat, and it would start at the same speeds 80+ mph was when it was the worst, replaced that yoke and the vibration stopped. But he replaced the driveshaft with an upgraded one so the yoke should be new in it. Unless he got bad yokes from new possibly.

Man I love that 08, such a boss! Then it's the 05 because the paddle shifting, exhaust sounds and it just rips! Anyway happy birthday Greg🤘🇺🇸 still lovin the content

I bought the same trans jack when I bought my 10K Atlas lift. Best one I could have bought.

My 08 burned to the ground on the highway a little over 2 weeks ago. This video just shows the true passion for these trucks. Gotta love the third gens. Don’t know what I’ll get next yet.

Happy Birthday Greg!!! 🎂🎁🎉 I love your RU-vid channel, keep up the great work.

Happy birthday! Love this video! Love seeing the 08 back on the road!!

I love this style of video!

Out of every truck in the fleet, I’d love to own the 08 most😍

Happy birthday. We need to start go fund me for Mike. 😄

Happy birthday the 08 sounds like my truck now, always slamming gears and past redline

I have to say the 08 is my favorite out of the fleet, then the 02

Happy birthday buddy. We appreciate what you do.

The 08 sounds so damn good going through the gears... love it!

I'm so happy the 08 is back on the road! Thats the truck that got me to subscribe to the channel and it only got better from there

1:40 really!? What's up with the rail next to the Peterbilt?

that 08 is a dream

Dude that ol tow pig sounds so damn good. 🤙 Cool see it out stretching 😎

Such an epic truck to be giving away! Not to many trucks you can obtain that have such a well documented history of love to look back on. Hoping to be the one to bring this bad larry home! 🤞🤞

Love that 08. Hope silent Mike gets his truck figured out. I know that’s frustrating. Stay well and stay safe

Happy birthday Greg! Good to see the 08 so much recently

If the converter to hub issue checks out (or, this might be cheaper and is definitely easier) take a look at the tires real close. Similar symptoms, ended up being broken belts on two rear tires. Goose eggs were protruding INSIDE the tires tho, so my local tire shop had to bust them off to confirm what was wrong with them. Found the issue when those two wouldn’t road force balance. Good luck!

Just amazing, sounds great!

Love the 08. Glad to see it back

LOVE,LOVE, LOVE a crisp stout cummins WITH the 6spd! 🤙🤙👍

Damn that thing sounds so good!!

awesome to see the 08 banging the gears!

That 3rd gen 08 is definitely my favorite truck in the fleet

Man I've been trying to catch up on videos bro! Been doing tons of work I see Mr Gregg everything is looking awesome! Also HAPPY BIRTHDAY GREGG! hope had a awesome weekend you and your family buddy. Also hope all is well since I been little part pooper not been on watching your videos haha.

Happy early Birthday Greg! I hope you and your family have a good'en, be safe, stay blessed, and keep truck in 👊

Cummins sound is amazing 🤩

Happy birthday, did you buy a dragster? Seen it next to the Peter built when ups pulled up

The vibration issue might be the converter. Try going 82-85 mph and just lightly tap the brake pedal to unlock the converter to see if it goes away. You can also have too much converter clearance to the flexplate and you pulled the converter out of the pump too far. Also there may be an issue with the overdrive planetary gearset, i have seen this before on a ford causing a vibration at specific speeds. Hope this helps

Check bearings in diff. Had a truck that broke the trans case twice before I found it. Happy birthday.

Happy Birthday Greg. Been since the 1st day of the 1st gen and love the channel. It drives me crazy to see all the trucks scattered across the yard, could you line them all up aha. Also why dont you tarp up the pro mod and put it outside so you have more room in the shop for activities

I saw a rail and what looks like another enclosed trailer, what's going on?

Torque converter shudder. My ranger did the same thing n I did all the same stuff as you. Didn't go away till I swapped the converter. Hopefully I'm wrong but that was the case with mine. 2 wheel drive ford ranger.

Happy Birthday Greg. Mine is today.

Put a hydro assist on it and your streeing will be on point. I built a setup for my jeep with 37s very minty now 👌

Some grease in the axle u joints might help the steering, such a overlooked part on most truck.

Happy birthday early for Sunday HOPE you have a great day.

Definitely my favorite Greg A truck

Nice!! Sounds great... :-)

God bless I want my 06 with a 6speed now

Looks like with that turbo/ head/ injector setup it runs pretty clean for that power level.

Sounds sick!

✌🤘🍻🍻🍺 Happy birthday bro!

Happy birthday Greg mine is also Sunday the 4th.

A Cummins dragster in the works awesome...

wicked truck man.

Mike seems to be hanging out with you a lot more!

I have a 2015 6.7 g56 truck that’s got a 5” straight piped. I wish it sounded as raspy in “higher” rpms like the 08! Maybe it is and I just don’t hear it from inside but the 08 definitely gets the blood flowing!

Miss when Delton worked at east coast diesel here in Pennsylvania. That man could build a manual trans fairly well

Might pull the drive shaft and check the pinion really good make sure you don’t have a bearing going out.

My auto 2011 3500 runs super great with a fi s472 billet wheel turbo! But I’m also running dual fuelers, 150 hp ddp sticks, and a couple other things. I know I need like 100% overs but she’s still mean!

3rd gen is looking and sounding mighty fine👌🏻🤘🏻♠️ and happy early birthday brother 🤜🏻🤛🏻🎊🎁

Happy birthday Greg

Happy Birthday 🎂

Dont forget you installed that HD steering box on the 08. I've got one also and it drives really "heavy"

Sounds good. I think I have 6 speed fever again

The glance over to the passenger mirror for the soot check. That's by nature lol.

I have a 2012 Laramie Longhorn 6.7. I have the 68 and will be having that completely rebuilt, just have to find someone who’s able to build it back even stronger. As of right now I havent had any issues and I currently have 133k miles. But I do plan on doing a second gen swap and banks intake horn, new head studs and obviously will be purchasing a better tuner. It’s currently deleted but not tuned. All stock

Hold up you're not just gonna sneak a rail beside the Pete and not talk about it.....

Does the steering wheel bind in half turns, if so pull out the steering intermediate shaft, the ujoint in it may be binding, I have replaced tons

Happy Birthday

Happy birthday 🎈🎁🎉🎂🎊

Is that pipe dope your using for them hex block off’s in the monster ram. I was wonder because i have a boost leak because of them.

Happy birthday

thanks for another great video greg! do you feel that your south bend clutch you have installed in the 08 is still the best option for the new found power ? im looking for one for my 18 with the same set up ? ( sorry i posted this before i even watched the video lol)

Try unbolting the drive shaft and rotating it 180°. Just a thought, everything may not be balanced together even though they have been balanced separately. Harmonics are a tricky thing sometimes. If not that then try getting the duals rebalanced.

What exhuast is on this? Sounds pretty similar to my 06 5.9bwith a 4 inch straight to a 5 inch tip.

The 08 sounds badass

Sick truck! What size of lightbar do you have hooked to your bumper, I want to order one for mine but I’m not sure what size I would need.

Hey brother if the front suspension is looking good then the vibration problem is going to be the U-joints on the axle differential. Check to see if you have any play in the U-joints.

Have you guys found out whats wrong with the 06 5.9 truck? Im having the same issues and i replaced all front end parts everything. Tires all perfectly balanced properly and im still having the bouncy issues between 75 to 85

Happy birthday brother

Get on her Greg, 2 Step launch controller!? Which one would u recommend for my build. I would like it to be universal for an economic sense.

Sick bro!!.. Aloha 🤙🏽

Happy birthday Greg and did anyone else see the dragster?

Only thing left for the 08 is a Bath.. dually issue could still be the driveshaft. I'd try rotating it in the yoke

Aluminum wheels can cause vibration if lugs are over torqued

Happy b-day ! Sunday

A variable vibration that comes and goes within a specific speed range is almost always tires. The harmonics of the rubber changes as the speed changes causing the vibration to come and go. If it was a hard part imbalance it would just get worse the faster you go. Try swapping a set of tires from another truck. If it goes away then you know it’s the tires. Could be one that’s separated or just a lousy made tire. All manufacturers factor in that some products will be lower quality, that’s what warranties are for. If everything was perfect the price would be more than double.

One piece aluminum drives shafts have a speed rating... may ask whoever built it....

Everytime I watch you drive this truck, I regret going with a built 68 over a 6 speed swap. I love my Randy's 68 but growing gears is fun. Thought I'd hate it since I'm always driving an 18 speed log truck but shit, I hardly drive my Dodge anymore.

Check the rear yoke. Or maybe the input shaft

Where did he get that drive shaft built? I want one for my 2wd but no one around here wants to make one

Greg, im betting the vibration is a tire issue.....nut have you guys checked his motor mounts to see if they may be causing it? Also glad to see Mike around again! You guys building a dragster next?

Steering feels funny ..while driving a dodge I’m shocked ha

Greg does this truck have the hamilton 178 208 cam if so does it help ?