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91 C-1500 Silverado Speed and Temp Gauges not working
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partshunter
New User
Dec 18, 2012, 2:46 PM
Post #1 of 2
(2576 views)
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91 C-1500 Silverado Speed and Temp Gauges not working
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HELP!
I have a 91 Chevy Silverado, C-1500, 5.7 TBI, 700R4 Trans.
The speedometer and Temperature gauge (Not Idiot Light/has Gauge) do not work.
Have changed out the Speedometer/gauge cluster three times. Still same issues.
I checked the wiring from the Temp. Gauge (Driver side), Looks ok, no breaks or brittleness.
Checked the wiring/plug to/from the Speed Sensor. Seems good.
Is this due to faulty sensors?
I pulled the brake drum (passenger side rear). grease from axle leaking from seal into brakes. Bought the Wheel seal (Presses into axle behine brakes), and axle grease.
I know to pull rear cover, and that C-clips need to be removed to slide axle out. But is there anything else in rear end that I need to know how to do? I do not have funds to buy manual. Please help. Thanks alot!
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nickwarner
Veteran
/ Moderator
Dec 18, 2012, 3:20 PM
Post #2 of 2
(2552 views)
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Re: 91 C-1500 Silverado Speed and Temp Gauges not working
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I hope you mean gear oil, not grease. Those bearings use the same gear oil the diff uses. I got this info on autozone.com for you. If you set up a username and password you can view their tech info for free. Worth looking at and actually better than the Haynes manual.
xle Shaft, Bearing, and Seal
Print
REMOVAL & INSTALLATION
Semi-Floating Axles
EXCEPT LOCKING DIFFERENTIAL
See Figures 1 through 6
  
Fig. Fig. 1: Remove the differential pinion shaft lockscrew
Fig. Fig. 2: Remove the pinion shaft
Fig. Fig. 3: Remove the C-lock from the inner (button) end of the shaft - Support the axle on jackstands.
- Remove the wheels and brake drums.
- Clean off the differential cover area, loosen the cover to drain the lubricant, and remove the cover.
- Turn the differential until you can reach the differential pinion shaft lockscrew. Remove the lockscrew and the pinion shaft.
- Push in on the axle end. Remove the C-lock from the inner (button) end of the shaft.
- Remove the shaft, being careful of the oil seal.
- You can pry the oil seal out of the housing by placing the inner end of the axle shaft behind the steel case of the seal, then prying it out carefully.
- A puller or a slide hammer is required to remove the bearing from the housing.
To install:
- Pack the new or reused bearing with wheel bearing grease and lubricate the cavity between the seal lips with the same grease.
- The bearing has to be driven into the housing. Don't use a drift, you might cock the bearing in its bore. Use a piece of pipe or a large socket instead. Drive only on the outer bearing race. In a similar manner, drive the seal in flush with the end of the tube.
- Slide the shaft into place, turning it slowly until the splines are engaged with the differential. Be careful of the oil seal.
- Install the C-lock on the inner axle end. Pull the shaft out so that the C-lock seats in the counterbore of the differential side gear.
- Position the differential pinion shaft through the case and the pinion gears, aligning the lockscrew hole. Install the lockscrew.
- Install the cover with a new gasket and tighten the bolts evenly in a criss-cross pattern.
- Fill the axle with lubricant.
- Replace the brake drums and wheels.
Fig. Fig. 4: Remove the axle shaft from the vehicle
Fig. Fig. 5: Use a puller to remove the oil seal
Fig. Fig. 6: Install the oil seal using a seal installerLOCKING DIFFERENTIAL
See Figures 7 and 8
This axle uses a thrust block on the differential pinion shaft. - Support the axle on jackstands.
- Remove the wheels and brake drums.
- Clean off the differential cover area, loosen the cover to drain the lubricant, and remove the cover.
Fig. Fig. 7: Positioning the case for the best clearance-semi-floating axle w/locking differential
Fig. Fig. 8: Aligning the lock-semi-floating axle w/locking differential - Rotate the differential case so that you can remove the lockscrew and support the pinion shaft so it can't fall into the housing. Remove the differential pinion shaft lockscrew.
- Carefully pull the pinion shaft partway out and rotate the differential case until the shaft touches the housing at the top.
- Use a screwdriver to position the C-lock with its open end directly inward. You can't push in the axle shaft till you do this.
- Push the axle shaft in and remove the C-lock.
- Remove the shaft, being careful of the oil seal.
- You can pry the oil seal out of the housing by placing the inner end of the axle shaft behind the steel case of the seal, then prying it out carefully.
- A puller or a slide hammer is required to remove the bearing from the housing.
To install:
- Pack the new or reused bearing with wheel bearing grease and lubricate the cavity between the seal lips with the same grease.
- The bearing has to be driven into the housing. Don't use a drift, you might cock the bearing in its bore. Use a piece of pipe or a large socket instead. Drive only on the outer bearing race. In a similar manner, drive the seal in flush with the end of the tube.
- Slide the shaft into place, turning it slowly until the splines are engaged with the differential. Be careful of the oil seal.
- Keep the pinion shaft partway out of the differential case while installing the C-lock on the axle shaft. Put the C-lock on the axle shaft and carefully pull out on the axle shaft until the C-lock is clear of the thrust block.
- Position the differential pinion shaft through the case and the pinion gears, aligning the lockscrew hole. Install the lockscrew.
- Install the cover with a new gasket and tighten the bolts evenly in a criss-cross pattern.
- Fill the axle with lubricant.
- Replace the brake drums and wheels.
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