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A collection of helpful articles based on reader submissions
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Below is a collection of Jim Grant's Tech Tips sorted by Vehicle Make. These Tech Tips were answers to questions submitted to Jim by ALLDATAdiy.com users over the course of many years.
If you have any questions, please feel free to email us.
 
 

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  Jim Grant's Tech Tips

'90 Chevy S-10 Blazer, Rear Axle Seal

Q: What parts are required for the rear axle seal replacement on a '90 Chevy S-10 Blazer?

- Justin

A: When replacing a rear axle seal on a vehicle of your type I would suggest replacing both. Why? The biggest part of the job is getting the rear axle out so the seal can be removed. Once you're to that point it only takes about 15 minutes at best to replace the other seal. It would be a shame to have to go back in six months later and do all that work again to replace the other seal. After all they have both lived in the same environment for the same amount of time. If one seal has failed the other is likely not too far behind. Be sure to inspect the axles and bearings wear. The area where the bearing contacts the axles can be a problem. If there is wear it is suggested to replace the axle and bearing, but there is an aftermarket fix that repositions the bearing to allow it to contact a different area of the axle. This saves the cost of a replacement axle. You'll also want you have a replacement lock bolt for the differential gear shaft. This little bolt is known for breaking at just the wrong spot creating all kinds of removal headaches. When all is said and almost done, you'll need a way to pump gear oil back into the differential. Parts to have on hand; 2 seals, lock bolt, silicone or replacement gasket for the differential cover and about 4 pints of gear oil. Good luck and I hope it goes smoothly.

 
     
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