rear-end hops when first moving. - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 02-01-2003, 02:16 PM
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rear-end hops when first moving.

Its not a big prob. But I want to ask to make sure it wont cause bigger probs later on down the road. I have a 5 speed and when ever I take off in first gear, no matter how slow or low of RPM's I give it it hops for a few seconds when I let off the clutch. [img]images/graemlins/bs.gif[/img] I was wondering if yall could give me your thoughts on why it might be doing this. I just replaced the fly-wheel clutch and slave cylinder about a year ago. Another thing, when I put it in 4 wheel drive it dosen't hop no matter how hard I try to make it. Could it be my drive shaft is at too much of an angle or what? Any suggestions would help a lot.
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post #2 of (permalink) Old 02-01-2003, 07:55 PM
 
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Re: rear-end hops when first moving.

heres my theory, when you start off the axle twist a little clockwise changing the rear u joints angle so it creates a pulsation in the drive line then once you overcome the initial friction it takes less force to move so the axle doesnt twist clockwise.
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post #3 of (permalink) Old 02-01-2003, 11:01 PM
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Re: rear-end hops when first moving.

sounds like a typical case of axle-wrap. this is indeed woesened by lifting a vehicle such as yours.
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post #4 of (permalink) Old 02-01-2003, 11:03 PM
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Re: rear-end hops when first moving.

That really sucks, what do you think can fix the problem? Will I need to extend my drive shaft or what? Is there a way to stop my rear axle from twisting like that? [img]images/graemlins/givemebeer.gif[/img]
post #5 of (permalink) Old 02-01-2003, 11:06 PM
 
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Re: rear-end hops when first moving.

When you lifted it, did you use a block, addaleaf, or replacement springs? A block of that size would definitely cause axle wrap.
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post #6 of (permalink) Old 02-01-2003, 11:13 PM
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Re: rear-end hops when first moving.

Yeah I used all block....I have been thinkin about changin it out to leaf though....would that fix the pro you think?
post #7 of (permalink) Old 02-01-2003, 11:39 PM
 
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Re: rear-end hops when first moving.

absolutely. using a block that size is like asking for broken ujoints. Change it, and when you do, check all your ujoints in the driveshaft to see if theyre still good or not
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post #8 of (permalink) Old 02-01-2003, 11:40 PM
 
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Re: rear-end hops when first moving.

You can bet if you put springs in and torque to specs then recheck, you should have no wrap-up. Who had that pics of the rear axle that was cracked at the third member I can't find it, that's something you dont want... I was thinking it could also be tranny mount too. [img]images/graemlins/givemebeer.gif[/img]-Bob
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post #9 of (permalink) Old 02-01-2003, 11:53 PM
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Re: rear-end hops when first moving.

Thanks for the advice fellas, I was thinkin about changin to all leaf springs and after hearing what you guys have to say I am deff going to do it as soon as possible.
post #10 of (permalink) Old 02-03-2003, 11:41 AM
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Re: rear-end hops when first moving.

new springs will definitely solve your problem. lucky for you you havent broken any u-joints with axle lift blocks of that size.
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