pionion seal

i've replaced the pinion seal on my 96 tahoe twice in a three month period,any idea why this goes out? i was driving driving normally both times it went out. :confused:

Proper fluid level should be somewhere around 1/2 inch below fill plug...any higher and it overloads the seals. If thats OK:

Check the seal surface on the yoke. If there are wear ridges, get whats called a speedy sleeve. Thats the most economical option for this, the other being to replace the yoke.

Saying that, I assume you have checked the pinions bearings and replaced the crush sleeve and set proper bearing preload and all that jazz.

Hope that helps you out

..these are great tips! THANKS!