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Old 08-30-2015, 01:32 AM
n54power n54power is offline
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Default hydra tuning -modified valve body vs non

Yes I've searched but no real answers.

Im.seeing a modified valve body option for each tune. Is there a benefit or downside to this.
I have a built trans but I'm not sure on the valve body used
Since the standard tune would increase line pressure, would this be a a safe option?
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00 f250 ccsb
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Old 08-30-2015, 05:04 AM
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79jasper 79jasper is offline
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Imo, if a trans is "built," theoretically it should have a "modified" valve body.
You don't know who built the trans, nor what they did to it?

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Old 08-30-2015, 09:15 AM
Northwoods2002 Northwoods2002 is offline
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While I rebuilt my own 4r100 and use the modified valve body (transgo tugger) tunes, I've often wondered how much line pressure php has in the stock tunes and if it would be detrimental to a modified transmission. Maybe Mark K or PHP will chime in?
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2002 F250 7.3 Extended Cab Lariat Long Bed - AIS Air Intake; MBRP 4" Stainless turbo-back exhaust; Glowshift triple pillar w/EGT,ATtemp,boost; Racer X Eagle Modified Converter; 4R100 Completely rebuilt with upgraded H.D. internals and Tugger VB kit; Hydra Chip with PHP tunes
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Old 08-30-2015, 09:26 AM
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This is where its good for trans guys to talk to tuners. Will Bill do this?
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Old 08-30-2015, 12:04 PM
n54power n54power is offline
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The trans was built shortly before I bought the truck.goerend parts were used. The trans has about on it.
I'm religious on maintenance so it's healthy. I have been thinking about updating the valve body.
Going from a php FU with no valvebody tune options to the hydra with them I added a each to it.
Using the standard and modified I'll see how it deives
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6" w/37" tires
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Old 08-30-2015, 12:35 PM
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When I installed the trango tugger kit Matt just said to see how it drove before getting a reburn. It drove and shifted great so I just left it
When I sent my chip in for the injectors- standard TS chip, I told them about the Trans mods but it shifts just like it did so I don't know if they changed much..

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  #7  
Old 08-30-2015, 02:01 PM
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Derek@Vision Diesel Derek@Vision Diesel is offline
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I would start with the standard, non valve body tunes, and see where that gets you. Shift firmness is really the difference between the tunes and we have found quite often with John Woods transmissions and PHP tuning that the standard tunes work AWESOME. We rarely install the valve body tunes, I like the crisp tight shifts that you can feel.
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Old 08-30-2015, 03:03 PM
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Carolina444 Carolina444 is offline
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I know the JW valve bodies that you buy from the vendors are setup for the tuner to add the line pressure desired. I tried the php "modified vb." tune and it shifted very soft and slow.
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Old 08-30-2015, 10:44 PM
n54power n54power is offline
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Good to know,thanks.
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00 f250 ccsb
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6" w/37" tires
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Old 08-31-2015, 07:51 AM
Northwoods2002 Northwoods2002 is offline
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Ummm, this makes me wonder if I should recalibrate my hydra with a normal tune for comparison...
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2002 F250 7.3 Extended Cab Lariat Long Bed - AIS Air Intake; MBRP 4" Stainless turbo-back exhaust; Glowshift triple pillar w/EGT,ATtemp,boost; Racer X Eagle Modified Converter; 4R100 Completely rebuilt with upgraded H.D. internals and Tugger VB kit; Hydra Chip with PHP tunes
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