Tranny cooler question
I talked to my mechanic a while back about adding a tranny cooler. He looked at my truck and said I already had a heavy duty cooler installed. On one trip with a long up hill pull, I saw the tranny te...
Forum Discussion
ib516 wrote:Mark Kovalsky wrote:
There is no thermostat or check valve in the 4R100 that would make the trans heat up.
The 1999 Superduty truck had a unique trans cooling problem. They were built with ONLY an air to oil cooler in front of the engine radiator. There was no transmission cooler inside the radiator. It didn't take long for Ford to realize that was a BIG mistake! In mid-year 2000 they added the transmission cooler inside the radiator back into production.
Many 1999 trucks had the radiator replaced with one that had a transmission cooler. If your truck doesn't have a radiator cooler that would help bring the temps down quite a bit.
The second thing that would make a huge difference is changing the air to oil cooler for a cooler from a 6.0L truck. This cooler is many times larger than your stock cooler. It mounts to the stock mounts, so it is an easy bolt in. The only modification needed is that the cooler has 1/2" lines, your truck has 3/8" lines. Your can get adapters to go from 1/2" to 3/8" at any hardware store.
I'd do what this guy says ^^. He knows his stuff.
X 10,000. Put a 6.0 cooler on and no more worries!
