transmission cooler?
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Senior User
Joined: May 2005
Posts: 238
Likes: 1
From: Southwest Ohio
transmission cooler?
97 F350 RC LB 4X4 7.3L E40D
I know these trucks have an external cooler, but do they also have an internal cooler in the radiator? I am replaceing the trans and i will put a new external cooler on it, but do i need to have the thing flushed?
Thanks
I know these trucks have an external cooler, but do they also have an internal cooler in the radiator? I am replaceing the trans and i will put a new external cooler on it, but do i need to have the thing flushed?
Thanks
Post Fiend
Joined: Oct 2003
Posts: 5,903
Likes: 1
From: MICHIGAN
If you replace the stock cooler and bypass the in-rad cooler it will take forever to get the tranny up to operating temperature, especially if you drive short trips or live in the colder climates. LEave the in-rad cooler hooked up or Get a cooler with a thermostat (thermal break). Trannys need to run hotter than 120 degrees IMO.
Elder User
Joined: Mar 2004
Posts: 509
Likes: 1
From: Pasco, WA
Synthetic (Mercon- compatible) trans juice is a good thing. I run Mobil 1; about 50k miles per change, double what I run dinosaur oil. Syn handles the heat better. I also use 1-1/2 bottles of red LubeGuard per tranny change.
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