Anyone ever do this?

[Pizza_Man]

So i was messin around a little bit, and I found out that a hot runnin 350 can spin 35's on the pavement... at a cost. I snapped the U-joint, and rolled my rear axle a little bit. But has anyone else ever crushed their spring perches from doing this? mine are crushed in the front almost completely and apparently, thats not something normal . My dad used to run a 427 w/ NOS on his 76 blazer - along with 36's, and he said he snapped a ton of u-joints but never crushed his spring perches....
So, has this ever happened to anyone else?

Also, this is on a 71 Jimmy, with the stock 12 bolt in the rear and a 4 speed (i did maybe perhaps dump the clutch )

 

[George_Pimpdaddy]

No way your spring perches should be crushed. Take a picture and post it up.

 

[bp71k5]

My old 12 bolt had a crushed perch and had a stock motor and 31s so I don't think it takes a big motor to do it. Maybe it just hit something too hard.

 

[73redblaze]

never seen perches break
P.S Bp you live really close to me. we should wheel sometime

 

[Pizza_Man]

the only thing i hit hard was the skinny pedal, and i can't take pic until tomorrow, but i can take pics of the u-joint...

 

[bp71k5]

the only thing i hit hard was the skinny pedal, and i can't take pic until tomorrow, but i can take pics of the u-joint...

Was it ok one day an then flattened the next? Maybe a previos owner?

 

[Pizza_Man]

Was it ok one day an then flattened the next? Maybe a previos owner?

no, it was okay one minute, then hot rodded, then crushed and snapped the next minute.

 

[bp71k5]

P.S Bp you live really close to me. we should wheel sometime

I'm trying to plan a day in hollister sometime in may with a couple people. I need to practice on something other than a log next to a mud pit. I'll let you know if it gets out of the planning stage.

 

[bp71k5]

no, it was okay one minute, then hot rodded, then crushed and snapped the next minute.

Well then...

 

[GreenieK30]

Rounded spring perches are caused by loose u-bolts. I have fixed lots of them. It requires new perches, center pins and u-bolts. After the loose u-bolts causes the perches to round off, the axle rotates up and breaks the u-joint.

 

[Pizza_Man]

Rounded spring perches are caused by loose u-bolts. I have fixed lots of them. It requires new perches, center pins and u-bolts. After the loose u-bolts causes the perches to round off, the axle rotates up and breaks the u-joint.

they aren't quite rounded, as much as just plain flat out crushed in the front.

 

[73redblaze]

pics??

 

[Pizza_Man]

i'll have pics up by tomorrow night

 

[ryoken]

my 14 bolt had crushed perches when i got it.... corrosion usually has some play in it...

 

[muddermilitia]

After the 1st test drive in my brothers truck, he was backing it behind the shop and heard a clunk when he shifted into reverse. We got out and saw one spring perch was cracked in half and the other one cracked the welds off. Somehow the u-joint didnt break and the axle stayed in the truck. I think the 650hp BBC and 46" Mickeys may have had something to do with it lol. And that wasn't even full throttle

 

[Pizza_Man]

pic time?

 

[Hogback Fabrication]

Looks like your u-bolts were loose and the one side smashed because of it

 

[George_Pimpdaddy]

Good reason right there to be checking u bolts

 

[skratch]

Yeah, clearly not a case of too much torque . . . that's a case of nowhere enough torque






on the u-bolts . . .

 

[Pizza_Man]

so the u-bolt weren't torqued right?
then again, i never checked them, and i bought the rig already lifted so...
also, does anyone think the spring perches are anyhow salvageable? or just get new ones or even make new ones? keep in mind i am on a budget