Gear change

Hey Guys, I recently had my gears changed from 430 to 488. This weekend I checked the temp with a heat gun and the rear diff where the drive shaft goes in to the rear diff was almost 180 degrees after I get off the hiway. My Question is, is this normal or is something wrong? Can someone please check theres and see if its normal? The outside temp was 70. Thanks

 

They run hotter initially when your breaking them in the first few trips

 

X2

 

I have about 3000 miles on them.

 

any noises coming from the diff? I assumed you have changed the fluid after break in. What kind of fluid you running?

 

I don't really hear a noise but my tires roar so I cant really tell. Yes I changed the gear lube after the 500 mile brake in, Mobil 1 75w90. I thought about putting the rear on jack stands and listen for a noise but that's kinda unsafe. Can someone with 488 gears take the temp of yours and see what it is? 180 degrees may be normal.

 

I have 4:88s however I don’t have a way to take the temp. I am running 85/140 nitro synthetic gear oil in mine

 

When i get home im gonna touch my pinion, haha, and see if it is hot.

I can put my hand on a weber grille at 200 for a few seconds so maybe the pinion will feel the same?

Gotta see what a stock temp is

 

Bro-Science! I love it

 

I have a feeling the diff has to get warm. It’s basically A drill bit going through metal. Even if lubricated it’s going to get really hot.