Why did I change my front diff actuator?
The change was due to needing a faster engagement from the actuator. If you’ve run the older thermo style one for any length of time you know they’re not the fastest thing, especially when the axle and actuator is packed with snow or it’s very cold out. Some would take several minutes to warm up enough to engage the axle.
What kind of wiring does my 4WD have?
4wd is screwed up and has been screwed up in my 97 for awhile. Someone messed with the wiring at one time and GM wants WAY too much money for a new harness.
Why is my 4WD not working on my Chevy Silverado?
When shifted out of 4wd, the switch opens up and no voltage goes to the actuator. I would check voltage at the connector for the front actuator (at the front differential – it looks like a large bullet that threads into the front diff.) If it has 12 volts, the actuator is the problem.
Why is my 4 wheel drive light not engaging?
If you don’t shift it into neutral, the 4wd light will continue to flash and won’t get into gear. Seems to be a common occurrence on these trucks. Dodge dealers recommend engaging 4-lo, then back in 2-wheel drive, then back in 4-wheel drive hi (4H). This sequence apparently resolves the problem.
How to repair a 1988 GM Truck wiring diagram?
Access our GM Full-Size Trucks 1988-1998 Wiring Diagrams Repair Guide by creating an account or signing into your AutoZone Rewards account. Once you sign in, follow these instructions to access our Repair Guides. Add your vehicle in Manage My Vehicles. Enter your vehicle details.
Is there a free wiring diagram for a GM Truck?
Access our free Wiring Diagrams Repair Guide for GM Full-Size Trucks 1988-1998 through AutoZone Rewards. These diagrams include: Fig. 2: Sample Diagram: How to Read and Interpret Wiring Diagrams
Why does my front differential make a humming sound?
If you have a worn differential, its gears may start to grind more. This may even cause humming noises to emerge from the grinding of the gears. You will hear the humming sound get louder as you accelerate the vehicle. If you hear this, it’s a good idea to have your differential inspected, and possibly the transmission too.
What are the symptoms of a bad front differential?
There are a few noticeable signs that will present themselves if your front and/or rear differentials start to wear out or get damaged. Here are the most common symptoms that you can expect to happen if your differential goes bad. Whining noises are one of the most common and noticeable symptoms of a bad differential.