Rear end swap

Tiny
LAVELL CHERRY
  • MEMBER
  • 2005 CHEVROLET TAHOE
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 158,000 MILES
SUV listed above gave out with 3.42. Got one out of a 2000-2002 (don’t remember) with 3.73. While taking the 3.42 out I realized that it had 2 sensors that the 3.73 doesn’t. Installed anyway and now the ABS, traction control, and service brake system lights are on and I can’t bleed the brake system. Is there a way to bypass whatever those sensors were for?
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Saturday, July 20th, 2019 AT 6:27 PM

4 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Welcome to 2CarPros.

We got two problems. The sensors are wheel speed sensors and you won't get the ABS/traction control lights off. It can't be bypassed.

Next, you can't have two different gear ratios on a 4wd. The front wheels will want to turn faster than the rear which is going to damage the transfer case and other components.

As far as bleeding the brakes, I'm not sure what is happening. The system really hasn't changed. Are you getting anything from the rear brakes?

Let me know.

Joe
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Saturday, July 20th, 2019 AT 11:17 PM
Tiny
LAVELL CHERRY
  • MEMBER
Yea, I wasn t planning to use the 4x4 until I matched the front case. Rear brakes aren t doing anything. Not sure about front. Will have to jack front end and give it a spin but I don t believe it s working either.
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Sunday, July 21st, 2019 AT 6:36 AM
Tiny
LAVELL CHERRY
  • MEMBER
Probably just take it out, sell it, find the right one. Hopefully that solves my brake issues.
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Sunday, July 21st, 2019 AT 6:37 AM
Tiny
KEN
  • ADMIN
Here is how to change the rear differential out

Rear Axle Replacement (15 Series)

Removal Procedure

1. Raise the vehicle.
2. Place jack stands or utility stands, such as GMDE 123-B67313, at the front-end of the vehicle.
3. Support the rear axle with jack stands.
4. Remove the tire and wheel assemblies.
5. Disconnect the rear axle vent tube.
6. Disconnect the wheel speed sensor connector.
7. Remove the propshaft. Refer to Rear Propeller Shaft Replacement.
8. Disconnect the left-rear park brake cable from the rear axle.
9. Disconnect the right-rear park brake cable from the rear axle.
10. Remove the caliper assemblies from the rear axle.
11. Remove the stabilizer shaft from the rear axle.
12. Remove the crossover brake pipe from the rear axle.
13. Remove the coil springs. Refer to Coil Spring Replacement.
14. Disconnect the track bar from the rear axle.
15. Disconnect the lower control arm from the rear axle.
16. Disconnect the upper control arm from the rear axle.
17. Remove the rear axle assembly from the vehicle.

Installation Procedure

1. Install the rear axle assembly to the vehicle.
2. Connect the upper control arm to the rear axle.
3. Connect the lower control arm to the rear axle.
4. Connect the track bar to the rear axle.
5. Install the coil springs. Refer to Coil Spring Replacement.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

6. Install the crossover brake pipe to the rear axle.

Tighten
Tighten the bolt to 22 Nm (16 lb ft).

7. Install the stabilizer shaft to the rear axle.
8. Install the caliper assemblies to the rear axle.
9. Connect the right-rear park brake cable to the rear axle.
10. Connect the left-rear park brake cable to the rear axle.
11. Install the propshaft. Refer to Rear Propeller Shaft Replacement.
12. Connect the wheel speed sensor connector.
13. Connect the rear axle vent tube.
14. Install the tire and wheel assemblies.
15. Fill the axle with lubricant. Use the proper fluid.
16. Remove the utility stands and the jack stands.
17. Lower the vehicle.

Please let us know if you need anything else to get the problem fixed.
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Tuesday, July 23rd, 2019 AT 2:38 PM

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