Transmission Bypass Delete - Ford Powerstroke Diesel Forum
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  • 1 Post By cletusjermal
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post #1 of 7 Old 06-02-2019, 05:54 PM Thread Starter
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Transmission Bypass Delete

2000 F-550 and was wondering if anyone has done a Transmission Bypass Delete to make all the Tranny Fluid go through the Transmission Cooler. I have put an oversize 24x36 Cooler on and still get 230 Degrees pulling in the Mountains . I Suspect the Bypass Valve is staying open.
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post #2 of 7 Old 06-02-2019, 06:24 PM
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I did it. Worked fine without it. You just have to get spacers to put in it.
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post #3 of 7 Old 06-03-2019, 01:49 PM Thread Starter
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Summit makes a Kit Item #BDD 1600036 Bypass Delete with Spacers and Washers. I Bought one and it is in Shipment.
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post #4 of 7 Old 06-03-2019, 02:29 PM
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let us know how it works out for you temp wise

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post #5 of 7 Old 06-30-2019, 06:45 PM Thread Starter
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Sorry for the Delay in getting back . But I Changed out my 7.3L in my F-550 not sure what the Mileage was But I suspect High Mileage with a 79,000 Mile Engine, Took me a Week and a Half But I'm sure happy!! During this Changeout I Replaced the Transmission Pan with a Deep Dish and made the By-pass Delete. So far I'm happy with the Results seems Like I am Running about 50 degrees Cooler and has never shifted better. The Deep Dish pan also has Cooling Tubes which are supposed to give you 20 Degree drop in Temp of Transmission Fluid.
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post #6 of 7 Old 06-30-2019, 08:48 PM
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If I understand the bypass valve/tubes function correctly it is there to bypass the trans fluid back into the trans when there is a blockage of the cooler. So with the bypass removed or blocked there's no way for fluid to get pushed to the rear of the trans should you have a cooler blockage and therefor your trans would destroy itself in short order.
This is what was explained to me by my trans shop guy who rebuilt mine 10 years ago, and I had to go back to him recently because my trans temp gauge was reading like 190ish in the winter in normal around town driving, it was always like 150ish. He checked my bypass valve and it was faulty and leaking fluid back into the trans with out ever making it to the front coolers. Now I probably only noticed because I have a temp gauge but if not probably would've gone undetected until a major over heat of the fluid from towing or a good long commute in traffic on a hot day.
I would bet you'd have the same results if you just replaced the valve, without the added risk you now have. Just my opinion

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post #7 of 7 Old 07-11-2019, 02:44 PM Thread Starter
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Duffster I have replaced the Transmission Cooler with a 24"x36" 40,000 lb Cooler. Even with this Cooler and using my Power chip on the Lowest Level I was still getting 230 degree and higher Temps, Causing me to not use the Power Chip . If you get a Piece of debri in your Cooler to stop it Up the Bypass will only save you a short time . Getting debri in the Cooler would be the Result of Catastrophic Failure from the Transmission. The Fluid goes through the Filter before being pumped throughout the Transmission and more Damage is Caused by Overheating the Fluid than any other Cause !! So I by Eliminating the Transmission Pypass have ensured Lower Transmission Fluid Temps and Decreased the Likelihood of Transmission Damage!!
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