Today the wife & I headed up Union Pass in the Colorado River area. It was 105 degrees on the river & Union Pass is 3600 ft., the river 800 ft you do this climb in 12 miles. So it is a hard climb & hot temps in summer.
I got to Kingman AZ & I noticed my Blazer was hard shifting 1-2. So we stopped was checking out a bunch of classic cars. Then headed to lunch & the shifting was back to normal. We ate lunch & when we came out I noticed fluid under the Blazer. So I decided to see if I had a leak. I looked under the Blazer to see ATF all over the bottom of the gas tank skid plate & transfer case. I thought crap what is going on. Well, I just happened to know of a good shop in Kingman, that has done work for me in past years. So I drove over to see them. They put it up on the rack & it was coming from the transmission vent. So I must of got it hot climbing the Pass. So since summer temps are still cool I better add a transmission cooler. So tonight when we got back to the river I ordered a B&M SuperCooler. When it comes in I will get it installed by the shop that checked it out for us today. I have run a SuperCooler on my 97 Blazer 4x4. But I never had it blow fluid going over this pass before even in the summer. I pushed our 98 Blazer 4x4 pretty hard today up that pass. It runs so much better than our 97 did. I guess 70-75 mph trying to keep up with a Dodge 6.7 diesel was just to much without a cooler.

 

I guess I wasted my time a good space posting this. I was hoping maybe it would help someone with tranny issues. Sorry Guys