4R100 JW valve body and shifting. - Ford Powerstroke Diesel Forum
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post #1 of 3 Old 05-16-2012, 07:56 AM Thread Starter
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4R100 JW valve body and shifting.

Truck is a 2002 F350 7.3 Auto with 101k miles. Installed a DP F5 tuner and a John wood valve body last night. Got everything running. Topped off the trans and took the truck out for a test drive. As I'm leaving my neighborhood I notice it's not shifting from 1-2. I figure maybe it just has to relearn shifts. Leave the street and get up to about 25 and 3k RPM and still not shifting.

This point I'm worried already so I pull over. I put the trans manually into first and shift to second nice and firm like I remember my old 7.3 with a DP Tuner and JW valve body. A little relief. So I place my tuner in stock setting. No difference. So this morning I completely removed the chip. Still no difference in shifting. There is no shift flare or anything like its slipping. Just never shifts.

Do I have a bad VB? What to do now?


2000 Regular Cab SHORTY truck.

-7.3/ZF6 combo.
-TS tuned
-5" exhaust to 7" single mitre.
-DJM 3/5 drop
-22" wheels wrapped in 305 nitto 420's

COMING SOON
-Midwest shifter
-DP tuner


-2008 F350 CCLB ZF6 truck. Leveled, 22's w/37s, deleted, H&Stuned etc -SOLD
-2005 F350 CCLB 6" 37's, studded, tuned etc-SOLD
-2002 F350 CCLB 6"lift, 20's w/35's, DP tuner etc -SOLD
-2005 F250 CCLB 8", 20's w/37's bunch of mods -SOLD
-2002 F250 CCSB 4" lift,18's w/35's DP tunes etc -SOLD
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post #2 of 3 Old 05-16-2012, 11:33 AM
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Yea, I'd say you're gonna have to go back in and look at the VB

Make sure it's installed right and manually move the 4 "spools" to be sure everything's free...
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post #3 of 3 Old 05-16-2012, 11:54 AM Thread Starter
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Yea I figured that. I will be pulling the pan again this evening. I'm really looking forward to this messy job all over again. Thank you for the response.

I know there is only one way it goes in. What could have gotten stuck that would cause the trans to not shift from 1-2


2000 Regular Cab SHORTY truck.

-7.3/ZF6 combo.
-TS tuned
-5" exhaust to 7" single mitre.
-DJM 3/5 drop
-22" wheels wrapped in 305 nitto 420's

COMING SOON
-Midwest shifter
-DP tuner


-2008 F350 CCLB ZF6 truck. Leveled, 22's w/37s, deleted, H&Stuned etc -SOLD
-2005 F350 CCLB 6" 37's, studded, tuned etc-SOLD
-2002 F350 CCLB 6"lift, 20's w/35's, DP tuner etc -SOLD
-2005 F250 CCLB 8", 20's w/37's bunch of mods -SOLD
-2002 F250 CCSB 4" lift,18's w/35's DP tunes etc -SOLD
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