new guy ! questions

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07-04-2011, 10:59 AM

rexver

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Join Date: Jul 2011

Location: EMORY, TEXAS

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Year: 1999

Model: Cherokee

Engine: 4.0l

new guy ! questions

Long time lurker first time poster, just traded my suzuki for a 99 cherokee sport. The jeep has a lift on it and getting really bad vibs coming from driveshaft. I know i need to drop transfercase down some but do i need to add shims to rearend and if i do what degree do i start with ? I figured if i do both of them it should take care of vibe. Looks like its a 3 maybe 3.5 lift, blocks and spacers,with rancho 5000

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07-04-2011, 11:12 AM

BotakBeng

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Location: Las Vegas

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Year: 1999

Model: Cherokee

Engine: 4.0

Here is a good write-up about pinion angle adjustment and measurement.

This is how to measure lift height...

Quote:

Originally Posted by 96_xj

from the top of the axle tube (tube and not linkage) to the bottom of the "frame rail" the rail and again no linkage

front stock is 6.75"
rear stock is 6"

anything more is lift

GL and welcome from Las Vegas.

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07-04-2011, 11:25 AM

dogger15

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Model: Cherokee

just do a .5" tc drop and you should be fine

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07-04-2011, 12:04 PM

Quezzy

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Most driveshafts have a sweet spot. They normally dont like to run 180 degrees off. Not sure if the Cherokee can go on more than one way. Try unbolting the driveshaft and rotate is 180 then bolt it back up to see if it gets rid of the vibes. Make sure the shaft balance weights werent knocked off.