Wheel hop problem

[daddio5280]

I have a 94 pick-up 4x4 22re. I have bad rear wheel hop at about 45 mph on the street and it get worse with increase in speed. I just had all 4 wheels balanced to no effect. My rear springs seem stiff as shit(stock springs) and I put new pro-comp shocks on less than a year ago. I don't think its axle wrap as it keeps hopping during deceleration until it drops below 45-40 mph and during deceleration the axle housing should be un-wraped. It won't happen during quick acceleration either. Seems to come on when I hit minor road imperfections above 45mph. Shakes the whole bed of the truck and I can watch the rear tire in the side mirror jump up and down like crazy. Running 31x10.5 tires.

[ProBuilder]

You either have a seperated tire, a bent rim, or had WalMart balance the tires and they screwed up.

[subliminaltrips]

moisture inside a tire......... tire slime, fix a flat????

[TcmaBoy]

Go down under the truck and try to wiggle the pinion flange. When the pinion bearing starts to go it will cause problems like that. The truck will take on a nasty vibration in the rear, especially under deceleration.

You might also want to look over the leaf packs for a broken spring.

[subliminaltrips]

yea come to think of it the u joints or driveline could be suspect.

which models have teh carrier bearing? i thoight it was only x cab and long bed trucks?

[TcmaBoy]

The pinion carrrier, not the drive shaft carrier.

[subliminaltrips]

oh ok your talking about the carrier on the actual differential case. , if you had a worn u joint it coukld definatly wear that out in a hurry or vice versa.

[ovrrdrive]

I'll go with seperated tire like probuilder suggested.

I had three out of four tires seperate over a period of time and they all jumped like that. I could look around them and see a big bulge.

If the tires check out look for some suspension damage somewhere as well.

[subliminaltrips]

yea most likely teh problem. i had a tire get sand in the bead last week, i pulled the valve core out and deflated the tire. because i was in a hurry i used a hose to spray the bead out not thinking that i would allow moisture to enter my tire. now at 45 mph or if i hit a bump it will vibrate the piss out of the entire truck. makes the ballance machine read funny too. i ended up taking busting the tire loose on the face bead and using my shop vac to get all the water out. put it back on and now it rides smooth as a babys ass.

hard to believe that after i broke my steering knuckle that time and welded on it hasnt broke. furthermore i cant believe that after 8 budweisers and a shot of crown, i managed to align the truck without a rack and it goes down the road straight and my tires arent wearing unevenly. my old lady has been driving the truck for about 2 months delivering pizza's and it seems to be fine. i reckon ill have her take it to a rack soon though.

i also figured out why my driveline whines. i need to make a 2 inch driveshaft spacer on the rear pinion flange. after converting the 2wd rear suspension to spring over axel, the slip yoke that goes directly into the output shaft of the transmission doesnt insert far enough with the suspension as high as it is. rather than spend all the money to have the driveshaft lengthened or do my 8inch rear end and 4.56 gear swap that i can afford at the moment, im going to use a piece of 2 inch aluminum stock i have and have a good buddy of mine cut a donut out and then ill match up teh holes and drill it out to fit using some longer alloy grade hex bolts to replace the original bolts that woul dbe too short. ive had other ideas and considered steel but i figure aluminum is the lighest and wont effect the teh ballance of teh driveshaft.it would also be better than cutting the shaft and lengthening it.

sorry to hijack but today i was wheeling reall hard and i caught enough air that the rear suspension drooped anough that my yoke dropped slap out of the tranny. i was luckier than shit because the shaft stayed held up by the e brake cable so it didnt snap the rear u joints or anything else for that matter. i got the trusty bumper jack and used the factory jack to get the springs drooped down and slid the bitch back in. close call and i was lucky as shit. i was a bit worried about that happening when i did the lift but now im deffinatly going to use a spacer.

not that this has anything to do with teh thread but i figured i would ramble on a bit...

[lesgarbe]

I Had The Same Problem. Not As Severe As Your's. Check Brake Drums For Out Of Round. The Local Garage Was Able To Put Them In A Lathe And Check Them.

[subliminaltrips]

yea i have checked them, its actually the driveshaft, you can see it plain as day.