98 Z71 Drags Right Rear Wheel Every 10 Ft When In 4wd - Chevrolet Forum - Chevy Enthusiasts Forums

98 Z71 Drags Right Rear Wheel Every 10 Ft When In 4wd


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srv3fender's Avatar
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August 20th, 2010, 11:06 AM   #1  
98 Z71 Drags Right Rear Wheel Every 10 Ft When In 4wd

Ok i have a 1998 silverado z71 with a lift and 35's, whenever im on dry pavement and i turn on the 4 wheel drive and start to go the right rear wheel will stop for just a split second about ever 10 ft, when i put the truck in reverse and back up the left rear wheel does it and not the right. offroad i dont have this problem. The rear differential looks a little wet like the fluid is low, had the rear end rebuilt about 2 years ago, but dont know for sure what gears were put in, the guy says he think from memory he ordered 3.73s. Any help would be greatly appreciated. I would not normal care about this problem but im trying to sell the truck and i found a buyer and he doesnt wanna buy the truck until this issue is solved. <!-- google_ad_section_end -->

 
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August 20th, 2010, 11:58 AM   #2  
Hi srv3fender,

Welcome to the Chevy Forums.

The Z71 comes complete with a G80 LSD rear axle.(AKA POSI-REAR)

The benefit is you have three-wheel traction in dirt in 4WD. Both your rear wheels, and, if memory serves, your driver front wheel. This is great off road, and gives you a great advantage over a high percentage of stock 4WD trucks in the dirt.

Unfortunately, the locking rear can be a little miserable in tight turns on hard pavement. What you are experiencing is "axle hop" or posi axle bind. Since your rear axles are locked, there's very little play between the wheels, and when one wheel goes farther than the other, such as in a hard turn, the wheel going the lesser distance doesn't "slip" the way a standard non-posi rear axle does on hard pavement. With no other way to compensate, the stationary wheel, which is being forced to be stationary but wants to go the same distance as the wheel in the wide turn, breaks traction and spins, or "hops" to compensate.

 
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salmon arm BC

August 20th, 2010, 12:37 PM   #3  
if this hop is happening in only strait lines, i would say your axles have diferent gear ratios, if rear is binding the rear has lower gears

 
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August 20th, 2010, 1:09 PM   #4  
this is happening when driving straight and only when 4wd is engaged


Last edited by srv3fender; August 20th, 2010 at 1:12 PM.
 
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August 21st, 2010, 12:20 PM   #5  
i would say there is a difference in the gear ratios then, only use the 4wd when in slippery conditions untill it is taken care of

 
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August 23rd, 2010, 10:12 AM   #6  
Kindly allow me to apologize. Your original post made it sound like you were having these difficulties in turns. What RPO code do you have for your gear ratio?

Since your 4WD shifter only controls your transfer case(up forward), and has no control over your rear axle, this sounds like 2wd-K5 is right.

Check your Service Parts Identification sticker inside your glovebox, and see if you can determine your pickup's factory gear ratio.

Gearing Ratio RPOs:

GU5==323s
GU6==342s
GT4==373s
GT5==410s
GT8==410s

It almost goes without saying that you've been very lucky so far. Generally mismatched gears, or running your 4WD too long on hard dry pavement results in an axle bind which blows your transfer case.


Last edited by therewolf; August 23rd, 2010 at 10:29 AM.
 
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August 30th, 2010, 9:01 AM   #7  
Posted By: therewolf Kindly allow me to apologize. Your original post made it sound like you were having these difficulties in turns. What RPO code do you have for your gear ratio?

Since your 4WD shifter only controls your transfer case(up forward), and has no control over your rear axle, this sounds like 2wd-K5 is right.

Check your Service Parts Identification sticker inside your glovebox, and see if you can determine your pickup's factory gear ratio.

Gearing Ratio RPOs:

GU5==323s
GU6==342s
GT4==373s
GT5==410s
GT8==410s

It almost goes without saying that you've been very lucky so far. Generally mismatched gears, or running your 4WD too long on hard dry pavement results in an axle bind which blows your transfer case.
How do you know what these codes mean? Where do you find out what all those part codes mean?

 
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August 31st, 2010, 7:12 AM   #8  
Ha ha ha! I KNOW THIS BECAUSE I AM THE GENIUS OF THE UNIVERSE!

Seriously, google RPO codes. It takes some research, but with some tenacity and effort, you can find the meaning of almost any code.

There's even a couple of guys here at CF who will take your VIN, and translate your truck's RPOs for you. Aside from ice, there's not much cooler than that.

 
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August 31st, 2010, 7:48 AM   #9  
Posted By: therewolf Ha ha ha! I KNOW THIS BECAUSE I AM THE GENIUS OF THE UNIVERSE!

Seriously, google RPO codes. It takes some research, but with some tenacity and effort, you can find the meaning of almost any code.

There's even a couple of guys here at CF who will take your VIN, and translate your truck's RPOs for you. Aside from ice, there's not much cooler than that.
Awesome, who would these people be?

 
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August 31st, 2010, 7:55 AM   #10  
http://www.rpocodes.com/

 
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