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Old 02-11-2018, 11:57 AM   #31
Scoutboy74
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Default Re: 727 upshift mystery

Quote:
Originally Posted by DKindley View Post
Copy that, Thatís exactly where Iím at! Iím leaning heavy towards buttoning it back up and giving her hell. Itís kind of a gamble either way. If I go through the tranny again and it was the vb that would blow. Let me hit you with one other possibility- the governor. Could that little sucker jack up the line pressure enough to raise hell?
Yes it could. Did you take a pressure reading at the gov port?
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Old 02-11-2018, 12:00 PM   #32
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Default Re: 727 upshift mystery

Hate to admit it but no. Like an Adam Henry I got the high line pressure reading and no front servo reading and I knew it was messed up so I pulled the vb
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Old 02-11-2018, 12:05 PM   #33
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Default Re: 727 upshift mystery

Well, make that an intermediate step before dropping it if full function hasn't been restored.
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Favorite hobby...Driving Salma Hayek in my Scout

Coal Trickle - '99 Dodge Ram 2500 Q-Cab SWB 4x4 - 5.9L 24V CTD/NV4500
Hooty - '74 SII - 392/TF727/D20/3.73 D44's/Spartan FA/Krac-lok RA/RC 4" SUA/34x10.5 TSLs/33g Fuel/HFT 8k winch
Mongo - '71 1210 Std Cab 2WD - 345/TF727/RA17 D60 4.10 Trac-lok - "Mongo love candy! Duh, huh, huh!"
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Old 02-11-2018, 07:09 PM   #34
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Default Re: 727 upshift mystery

Sucfreakincess!! Scoutboy74 thank you for your help. I put the vb back in and it shifts and drives like a dream! To clarify what I actually fixed(more accurately unfubarred) I had put the kickdown sleeve on the throttle control valve in backwards. The small end faces out. So I essentially created a massive line pressure increase, actually maxed line pressure at all throttle positions- ya no good! Any way it worked and I,m back in business. Note to self- don't try to work on your valve body after working a graveyard shift and trying to stay up the next day.
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Old 02-11-2018, 07:15 PM   #35
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Default Re: 727 upshift mystery

If anyone has been following along or has this issue I learned something very important. I almost yanked my tranny because I heard air bypassing the clutch packs. When you air check the clutch packs, its ok to have some air leaking in the clutch pack itself. As long as the clutches "thump" with a quick burst of air you should be fine. I'm by no means an expert but I have been researching and studying the crap out of these 727's. If I can pass along any info don't hesitate to ask. Scoutboy74 was a huge help and sounding board and I'd like to help the next guy too.
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Old 02-12-2018, 06:57 AM   #36
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Default Re: 727 upshift mystery

Outstanding! Good job...the second time around. One little thing can really bite you in the backside sometimes. Great learning experience for you, though. Now, if you can just keep those lads from shock-loading the damn thing. I imagine they've learned they're lesson on that count. I did the same thing once in my high school hot rod, trying to impress a sweet Betty in a Hoopdee Accord stopped in the next lane. 351 Cleveland mated to a C-6 auto smoked the tires up real purdy once the light went green...then clank, clank, clank and huge clouds of white steam billowing out the seams of the hood. Miraculously, I didn't damage any of the drive train, but the fan blade sure ate the hell out of the oversized radiator I'd shoe-horned in. Betty Boop was very impressed as she drove off without so much as a backwards glance, never to be seen again. Come to find out, they really aren't that impressed by displays of vehicular abuse. Who knew? Some alcohol may have been involved as well. Not one of my prouder moments. Feel free to pass that one along to the boys if you like.
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Coal Trickle - '99 Dodge Ram 2500 Q-Cab SWB 4x4 - 5.9L 24V CTD/NV4500
Hooty - '74 SII - 392/TF727/D20/3.73 D44's/Spartan FA/Krac-lok RA/RC 4" SUA/34x10.5 TSLs/33g Fuel/HFT 8k winch
Mongo - '71 1210 Std Cab 2WD - 345/TF727/RA17 D60 4.10 Trac-lok - "Mongo love candy! Duh, huh, huh!"
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Old 02-12-2018, 10:47 AM   #37
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Default Re: 727 upshift mystery

Oh that is such a familiar story. I think laying on their backs in a lake of tranny fluid will make the boys think twice next time. Ahh not if theyre like the old man haha. It was still a good learning experience for us. Oh and I did get two sweet SO ratchets!!
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