Upgrades and Aftermarket - 7.3L EngineUpgrading and adding aftermarket equipment to your 1999-Up Super Duty or Excursion with 7.3L Power Stroke diesel engine. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.
2001 Ford F250 4wd auto 3" mini pack spring in the front and 2" block in the rear. Vibration used to be when I would floor it from a dead stop or anytime I would floor it going under 30mph Very noticable. Now it vibrates when I accelerate very noticable also. I have the carrier bearing spaced down 1/2" like the directions say 1/4" for every 1" of lift. I took it to a local shop and they said there was min wear on one u joint and carrier bearing so I had them put new ones on and it still does it. The mechanics said it seems like it has a transmission shudder and more than likely can be fixed with a bottle of this magic crap, hopefully this stuff arrives tomorow and it works but I am doubting it. Any suggestions would be great. Also with such a small lift I didn't think axle wrap would be an issue. Please Help. Thanks
Last edited by stinger254 : 10-29-2009 at 10:02 PM.
__________________
early 1999, 7/98, F-250 7.3L, 205,000+ miles, 4x4, triple disk torque convertor, K&N home made cold air intake, straight pipe exhaust, superchips tuner (stuck on high performance tune, because someone stole the tuner out of my truck), 3in of lift in front, 1in in back w/ 2009 SD rims w/ 2in wheel spacers wrapped in 35x12.50x18 hankook dynapro MT, aftermarket headlamps w/ LED's, ranchhand grill guard, 03' front bumper w/ fog lights, gooseneck hitch
Space that carrier bearing more boss. I had the exact same setup and had to space it more. Took care of the vibration.
__________________
2001 F250 7.3L White 4X4, Lariat Crew Cab, HAD 2.7" leveling kit with 4 inch block in the rear, 315/75r16 Mud Terrains, NOW HAVE 7 1/2" Superlift, Mickey Thompson Classic lock Wheels wrapped in Parnelli Jones Dirt Grips 37x12.50r16(not a huge fan), 05-07 Grille and Headlights, wood dash kit, Pioneer Flip out DVD player, Cobra CB mounted under the 4x4 switch, SUPER CHIP SOLD NOW HAVE DP-TUNER WITH STOCK, NO START, 80 ECON and 140 AGRESSIVE, DIY Intake with napa 6637 filter, IC Foil delete, new aftermarket tranny with sonnix shift kit and triple disc billet Torque converter, 4" Magnaflow Turbo back exhaust, Plantdrive wvo kit with 75 gallon external L shaped heated tank in the bed, Racor filter inline before the stock one, 132,000 miles
I spaced the carrier bearing more today,but it didn't matter what I did It didn't even help. So I pulled the blocks in the rear and left the Front raised and it still vibrates like it is coming thru the drivetrain down the center of the truck. After I did that I pulled the rear driveshaft between the carrier bearing and rear axle and put it in put the truck in 4wd and no vibration. So the vibs have got to be coming from the carrier bearing back. The good thing is that it uliminated the front shaft, transfer case, trans and every thing up front. So that's where I am at now. I am going to take that shaft to get checked out tommorow. I doubt it is the driveshaft but it is cheaper to get it checked out than to look at the rear end right now. This truck is really starting to pi$$ me off. ANY MORE IDEAS?
This truck is really starting to pi$$ me off. ANY MORE IDEAS?
Pinion angle. You have either got improper angle or axle-wrap. Been there, done that with lots of off-road rigs. I admin that I havent lifted my Ford, but I have done a lot of suspension mods on other 4X4s, and what you describe fits pinion angle problems exactly.
Lift blocks are widely recognized for causing excessive axle wrap, but because they are cheap lift, people keep hoping against experience. Never ever no matter what DO NOT use lift blocks. Period. Ever.
This may sound stupid, but I had a similar issue not too long ago on my '02 F250 with 6 inch lift and 36 15.5 Dick Cepeks. Found out the rear shocks were junk. Put new shocks on and the issue went away. No dampening under acceleration and the truck would shudder. Fine now. Just a thought.
I got my drivelines back today I got all new u-joints and my rear shaft resleaved and they took out the dampener in the rear shaft also. I put the drivelines in and It worked perfect no shudder so I put my 2" tapered blocks back in the rear of the truck and now I have shudder. I adjusted carrier bearing up and down and nothing helped. I am at the point to where I am going to take the whole lift off. What if the shocks are that bad? Thanks phantom7.3 good Idea. I did raise the truck another 2" in the rear with factory shocks. It kinda makes sense, but would it make the truck shudder that bad?
Here is the latest, I took complete lift off of the truck and still had vibration so I took it to the local tire place and they thought is was out of balanced tires, but it wasn't they found that the new driveline that I had just installed had two u-joints hanging up so they fixed it and Whaalaaa no Vibration. Truck has no more lift on it,but atleast the Vibration is gone. Thanks to all who had advice to offer.
Thanks again guys for all the help, but I sold the truck yesterday with out vibration, but I gave the guy the lift with it. He knows all about the vibration issue that It had with the lift, so he might keep it stock, but he really wanted the lift on there. If he does do the lift he will take it to the local 4x4 shop there and have them do it. Again thanks to all
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.
Linear Mode
