What year??? 2 questions

[Topdown]

What year did GM start running a stock tranny cooler through the radiator?
I am assuming it would be in the mid 80's sometime?

Will that radiator fit in a 1st gen Blazer?

 

[Muddytazz]

My 1975 stock rad has the tranny cooler in it /forums/images/graemlins/thumb.gif

 

[GM Man]

My 78 was stock through the rad, but after a rebuild of the ol turbo 350, went with an aftermarket cooler.

 

[Muddytazz]

I'm going to be running mine here pretty soon through both the tranny cooler in the rad and an aftermarket one /forums/images/graemlins/thumb.gif

 

[Seventy4Blazer]

my 74 had it.
Grant

 

[rdwest1369]

my 78 Jimmmy has a stock one

 

[dyeager535]

I'd guess around when the powerglide first came out. /forums/images/graemlins/smile.gif

Not all powerglides are liquid cooled which is why you'll see some of the PG bellhousings with cutouts for airflow.