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What about the trucks that have 2 coolers from the factory?
Far as I know all trucks with 2 coolers have an oil-to-water cooler in the lower radiator plus an oil-to-air up front, not 2 OTAs.
That said before I splurged on a 6.0 cooler I had an old school tube and fin cooler after that cute OEM OTA cooler. Never noticed any trans performance issues, but the temps came down further with the 6.0 so it clearly worked better.
The OTW cooler in the radiator is a big deal, very effective. If you don't have that I'd get the later radiator and plumb it in.
Far as I know all trucks with 2 coolers have an oil-to-water cooler in the lower radiator plus an oil-to-air up front, not 2 OTAs.
That said before I splurged on a 6.0 cooler I had an old school tube and fin cooler after that cute OEM OTA cooler. Never noticed any trans performance issues, but the temps came down further with the 6.0 so it clearly worked better.
The OTW cooler in the radiator is a big deal, very effective. If you don't have that I'd get the later radiator and plumb it in.
Thats my point, trucks that came with an OTW and air-oil cant be much different than a truck running 2 air-oils from a flow aspect.
I have also understand that OTW cooler is a must if towing heavy.
Broke,do you have OTW in the EX,or just two air coolers?
No OTW on this truck, just the 2 air coolers.
Hard to believe they produced the 7.3 with a TINY single air-oil cooler.
Maybe one day I will swap out the radiator or go with a 6.0 cooler. Might snap a few pictures of the hose routing, etc for the V10 cooler. Using the factory oil lines from my donor helped simplify the mounting.
Thats my point, trucks that came with an OTW and air-oil cant be much different than a truck running 2 air-oils from a flow aspect.
I don't know if the flow pattern or the diameter of the fluid passages differs between the coolers, be it OTW or OTA. Although, that may be something to consider when looking at consistent and sustained resistance to the ATF pump.
I have an IT/electronics background and fumble my way through mechanical things until I get it done or have to pay someone else to get it done. I am mechanically inclined and have a good compliment of tools, but I am incapable of performing some tasks. So, what I have said above may be completely off the mark, but it was something that I thought of when reading the comment from David above about the dual coolers.
Does the ATF pump push or pull the fluid? Does this make any difference regarding the pressure of the fluid going through 1 or 2 coolers? What are the passage diameters and paths in the coolers when looking at OEM vs. installed?
Just some questions that come to mind.
Originally Posted by brokestroke
No OTW on this truck, just the 2 air coolers.
Hard to believe they produced the 7.3 with a TINY single air-oil cooler.
I seem to remember Y2KW57 giving some details on this, but could not find the information via a quick search. I "think" he stated that the early run PSD's only had the OTA transmission cooler, but when the 2001 or later 2000's came out they had the OTA and OTW coolers. Ford allowed for customers to come back and have the OTW plumbed in and installed in their trucks at no cost that originally did not have the OTW cooler.
I think that is right...
On a side note, I ordered the front foam bump stops on Monday based on the recommendation of Brokestroke and look forward to installing them. Perhaps if I hit anymore tooth shattering potholes, they will be a bit more gentle on the old dinosaur I call a tow pig truck.
Does the ATF pump push or pull the fluid? Does this make any difference regarding the pressure of the fluid going through 1 or 2 coolers? What are the passage diameters and paths in the coolers when looking at OEM vs. installed?
The transmission fluid pump pushes ATF through the coolers outside the transmission, first through the OTW, then through the OTA, before the fluid is returned to the pan sump. The suction side is inside the transmission. The internal filter has a snorkle dipped into the low point of the pan sump that the cooled fluid was pushed into.
The question about passage diameters and restrictive paths through various types (and generations) of coolers is an important one. But it is impractical to answer by physical measurement of the orifices. It is best answered by measurement of return flow. And fortunately, measurement of return flow is the simplest to do, and is ultimately the only parameter that counts.
On a side note, I ordered the front foam bump stops on Monday based on the recommendation of Brokestroke and look forward to installing them. Perhaps if I hit anymore tooth shattering potholes, they will be a bit more gentle on the old dinosaur I call a tow pig truck.
Let us know when you get them installed.
For the cost and their effectiveness, they are hard to beat.
So does anyone know much about the "anti-wrap" leaf spring that came on rear of these trucks?
I like your bead lock wheels better... Also, they each appear to have a bit of junk in the trunk with the squatting rear end. Yours might be an optical illusion though based on the angle.
The V10 cooler is mounted to the fiberglass panel behind the grille. Mounted at the top with bolts and held in place at the bottom with stainless hose clamps. Hoses are factory Ford and spliced into the cooler loop with brass nipples.
Received the bump stops in the mail today. Ordered on December 17th, shipped from CA to GA.
They are very soft at the top and claim to be progressive. Hopefully I never need to use them, but if I do they will certainly do better than one 20 year old and one missing.
Received the bump stops in the mail today. Ordered on December 17th, shipped from CA to GA.
They are very soft at the top and claim to be progressive. Hopefully I never need to use them, but if I do they will certainly do better than one 20 year old and one missing.
So the anti-wrap springs have no bump stops anymore, rendering them useless. Figure it is easiest to just replace the bump stops on them, factory Ford units are ~100 a set. Decided to get something cheaper. The measured gap is 3" so I searched for universal bump stops.
This is what I went with for stops. A softer compound and for Low Rider use.
No OTW on this truck, just the 2 air coolers.
Hard to believe they produced the 7.3 with a TINY single air-oil cooler.
Maybe one day I will swap out the radiator or go with a 6.0 cooler. Might snap a few pictures of the hose routing, etc for the V10 cooler. Using the factory oil lines from my donor helped simplify the mounting.
These two threads may assist. I have a 99 V10 and added the radiator with OTW. Best thing I noticed is watching the temps drop after a hard run.
For the cost and their effectiveness, they are hard to beat.
Thanks again for the tip on the bump stops. I installed them a couple of days ago and posted images in the "what did you do to your rig today" thread at the link below. Going from 1 OEM bump stop to two progressive bump stops will hopefully help with the holes (on and off road) that I cannot avoid.
