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Question about rear differential - READ ONLY

18 messages,  Last post on Dec 16, 2003 at 1:19 PM

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What is this discussion about? Chevrolet Silverado 1500, Towing, Truck

Messages Page 2 of 2

#9 of 18 I used to have..... by mullins87

Dec 13, 2003 (7:13 am)

a locking diff in a GMC truck. That diff would make the loudest "bang" when it would lock and unlock. There were times I just knew the axle had broken by the way the rear end would shake. It did that for 96k miles with no problems, that's when I sold it 4 years ago, and it is still going today.

#10 of 18 by markmac1

Dec 13, 2003 (5:51 pm)

Well, I tested this today, and yup, it's a locker alright. I found a stretch of road that was sloping, and there was a bunch of water that had been flowing down the street, and it froze. So I put one side on the ice, and the other on the dry pavement, and stepped on the gas. It spun for about 1 second, and then went into a pretty violent wheelhop! LOL. I looked back in the mirror, and saw a big black strip on the pavement. So I guess that works. Now another question. Is this only on the rear, or is there another one on the front as well?

#11 of 18 by ryanbab

Dec 13, 2003 (6:26 pm)

there isnt one on the front only the rear.

#12 of 18 by markmac1

Dec 15, 2003 (7:19 am)

I figured as much. Thanks! I was also noticing while I was testing this, that sometimes it takes up to 2 seconds or more of spinning before the axle locks. Is this normal? Or should it be immediate? Does it have anything to do with the speed of spin? It seems that the slower the axle turns, the longer it takes to lock.

#13 of 18 by bigfur

Dec 15, 2003 (6:35 pm)

Only way to get the locker to lock in is if the differance in wheel speed is 100RPM or more, or so i was told by two dealerships when i asked. I know mine has it, cuz i dont use my 4X4 all the time in the winter here in minnesota, so i hear that bang quite often!

#14 of 18 by markmac1

Dec 16, 2003 (8:20 am)

It still boggles my mind how something can operate in such a violent way, and operate as designed! You would think it would be similar to a LSD where very soon after spinning occurs, your lockup would occur. But apparently you need to get enough speed up first, that way the gernade effect is a lot better! LOL

#15 of 18 by ryanbab

Dec 16, 2003 (8:26 am)

the look on the people faces in the car behind me when mine does make the gernade noise is priceless.

#16 of 18 by markmac1

Dec 16, 2003 (10:04 am)

Yep, priceless. It's that "Oh my, that sounds broken. Sucks to be him!" look

#17 of 18 by ryanbab

Dec 16, 2003 (11:07 am)

yea and you take off leaving them spinning their tires haha

#18 of 18 by markmac1

Dec 16, 2003 (1:19 pm)

I just can't wait to see how it's gonna perform on the drag strip next summer! Methinks I will have to get the tires nice and hot, because a lock up on traction compound may result in broken parts

Messages Page 2 of 2

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