Question about 1999 Chevrolet Silverado 1500

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Chevy Transfer Case

My 99 chevy silverado has a issue with the 4x4 inside the transfer case the gear just slips in and out whenever it wants causing loud thumping and griding noises..........is it all junk now can it still be fixed?

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  • opieinfnt Mar 02, 2009

    i think my transfer case is broken when you take off it makes a horrible grinding noise but it doesnt do it in 4 wheel drive or in revers is it the transfer case?

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  • 32 Answers

The most common thing to go wrong with chevy transfercase is the rear tailshaft has a snap ring that breakes. Just remove the bolts holding it on and inspect the shaft and see if the snap ring is broken.Then just replace it with a new on from the dealer.

Posted on Feb 12, 2009

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Posted on Jan 02, 2017

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SERVICE indicator (4WD/AWD) Lamp
The SERVICE indicator (4WD/AWD) lamp is an integral part of the cluster and cannot be serviced separately. This lamp is used to inform the driver of the vehicle of malfunctions within the automatic transfer case (ATC) system. The SERVICE indicator (4WD/AWD) lamp is controlled by the transfer case shift control module via CKT 1567.

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The direct battery supply line (CKT 1640) provides the power to the module and motor circuitry.
Transfer Case Encoder Motor
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Do you know what DTC'S are ?
DTC B2725 ATC Mode Switch Circuit Malfunction
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DTC C0308 Motor A/B Circuit Low
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DTC C0324 T-Case Lock Circuit High
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When i turn the dial to 4wheel low the light


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Jul 16, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

01 chevy silverado4x4 transfewr case


Changing the Fluid would help But, It will not solve the Problem. It sounds like you may have a Broken tooth on a Gear inside the Transfer Case. The only real way to fix this is to Take the Transfer Case off and check the Gears and Electronics. Maybe even get it Overhauled.

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