Hello all,
2005 Hummer 2 150000 miles. Last week it was 97 degrees here in NE Pa. and I noticed that fluid was leaking from my rear Differential. Looks like it was coming from the yoke, maybe a seal. I would check it after each short trip and it would leak a medium size spot then stop. I spoke to a mechanic friend who said it may be due to the excessive heat. This only happened on the one hottest day. I have driven it all this week with no signs of a leak. Could it be the heat thinning out the fluid too much at that time? I plan on having the seals replaced but want to see if it can wait. Any help is appreciated.

Kevin

 

Pinion seal failing, In the meantime rear diff fluid change time...

 

Thank you for the reply. Thanks also for the proper weight oil. Was my next question

 

no problem. the pinion seal is not a difficult repair, and a $12. part. Right now just drain and refill the fluid make sure it is full and use a quality fluid. I recommend rp maxgear. Make sure to monitor the fluid level if it still leaks before you replace the seal. GL

 

Thank you again very much..

Kevin

 

I forgot to add, make sure to check the condition of the vent tube. GL