I've had it with 727 fluid drainback....help
#14759
03/10/05 12:11 PM
03/10/05 12:11 PM
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Joined: Jan 2003
Posts: 3,336 Summit, NJ
whiplash
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I think I know what I need to do before I post this, but want some verification right/wrong:
383, 67 coronet, 727, had tranny rebuilt 15,000 miles ago, had 2400 rpm stall converter, NO PROBLEMS.
Changed to 3500 10" street fighter (please keep TCI comment to yourself, thanks), and trans will not go into reverse or drive without first revving it in nuetral.
Put in new manual valve with hole to charge pump in park, things a little better but still have to rev it if the car is shut off for more than 1 minute.
Always have to rev it over 2000 rpm for it to work, other wise no drive or reverse.
I personally think the converter is JUNK, or at least the snout is off spec.
I want a new converter, but really don't want to pay a bizzilion $$$ for a custom race unit when I just need a good street converter.
Is the converter the problem here????
Who should I call???
- 67 coronet 4dr, 383/727/GVOD, blown, EFI, daily driver
- 230/238, 114°LSA cam, 1.6 rollers, 9:1 comp, 8 psi boost
- NEW BEST ET - 12.40@110mph...
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Re: I've had it with 727 fluid drainback....help
[Re: Mr.Yuck]
#14761
03/10/05 02:49 PM
03/10/05 02:49 PM
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Anonymous
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Well if it's a 3500 stall convertor then..............
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Re: I've had it with 727 fluid drainback....help
[Re: Mr.Yuck]
#14762
03/10/05 03:22 PM
03/10/05 03:22 PM
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Joined: Jan 2003
Posts: 3,336 Summit, NJ
whiplash
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Yes, I'm saying that I need to rev the car for a second or two in N or D befoer the trans will "move".
Once I've done that and the car remains running, the trans shifts fine drives great.
I guess it is bleeding down?
67, have you had any experiences with the 175k? what diameter? 3000 stall behind your 440? Anyone else recommend the mopar 175k for a 450-475 SC,EFI 383?
What's the part #?
And Mopey, I know what your getting at, and no.
- 67 coronet 4dr, 383/727/GVOD, blown, EFI, daily driver
- 230/238, 114°LSA cam, 1.6 rollers, 9:1 comp, 8 psi boost
- NEW BEST ET - 12.40@110mph...
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Re: I've had it with 727 fluid drainback....help
[Re: whiplash]
#14764
03/10/05 03:55 PM
03/10/05 03:55 PM
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Anonymous
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both of my slushboxes do the same thing. my 65 will drain back in a few hours, the 69 a few days. i was told once what the problem was but didn't understand. i just start my cars in neutral. typical torqueflite problem .
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Re: I've had it with 727 fluid drainback....help
[Re: Paul_Fancsali]
#14766
03/10/05 04:34 PM
03/10/05 04:34 PM
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whiplash
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Thanks guys, so it doesn't look like it is the convertors fault, just a normal thing huh?
Maybe the "looser" convertor is making things seems worse because I have to rev the engine higher to get the fluid moving?
Paul, can you tell me more about the anti-drainback valve? PN? installation?
Does anyone think this is the convertors fault? Thanks again...
- 67 coronet 4dr, 383/727/GVOD, blown, EFI, daily driver
- 230/238, 114°LSA cam, 1.6 rollers, 9:1 comp, 8 psi boost
- NEW BEST ET - 12.40@110mph...
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Re: I've had it with 727 fluid drainback....help
[Re: RThunder]
#14770
03/10/05 05:18 PM
03/10/05 05:18 PM
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Joined: Jan 2003
Posts: 3,336 Summit, NJ
whiplash
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Montclair,
I know what you are saying, which is why I said what I did in the opening post, I thought it was the convetotr as well, still miight be, just wondering if it is "normal" for a high(er) stall convertor to make the issue worse. I've had this converotr in the car for at least 10,000 miles and it hasn't gotten any better or worse, its just annoying to have to rev the car to 2000 rpm everytime I start it. this is my daily, go to work, revv it, go to lunch, rev it, go back to work, rev it, go home, rev it, stop and get milk, rev it, get it?
A word (actually a few) on 3500 rpm stall on the street, I loved it with the NA 383, now that the car is SC, I think it stalls too high as the boost really comes on around 3000 rpm and the convertor flashes in the 4000 rpm range. I'd like it to tighten it up at least 5-800 rpm, but don't want to spend $700 on a custom convertor. Do you think the 175k (hemi?) convertor will do that?
Thunder, I do no think the convertor slipped out as it is bolted to the flex plate just fine..
- 67 coronet 4dr, 383/727/GVOD, blown, EFI, daily driver
- 230/238, 114°LSA cam, 1.6 rollers, 9:1 comp, 8 psi boost
- NEW BEST ET - 12.40@110mph...
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Re: I've had it with 727 fluid drainback....help
[Re: whiplash]
#14771
03/10/05 05:28 PM
03/10/05 05:28 PM
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Joined: Feb 2003
Posts: 7,982 Scranton, PA
Montclaire
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Quote:
I'd like it to tighten it up at least 5-800 rpm, but don't want to spend $700 on a custom convertor. Do you think the 175k (hemi?) convertor will do that?
I can't comment on the quality of new MP converters, mine is/was a NOS piece made by the original manufacturer. Can't recall the info off the top of my head, but it's an original hemi converter that was bought ages ago. It does indeed stall at 2800, and that's 700rpm less that what yours is rated at, so....
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Re: I've had it with 727 fluid drainback....help
[Re: Montclaire]
#14773
03/10/05 05:51 PM
03/10/05 05:51 PM
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Joined: Jan 2003
Posts: 3,336 Summit, NJ
whiplash
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no, I definately do not want a manual valve body. What issue of MA was that covered in?
- 67 coronet 4dr, 383/727/GVOD, blown, EFI, daily driver
- 230/238, 114°LSA cam, 1.6 rollers, 9:1 comp, 8 psi boost
- NEW BEST ET - 12.40@110mph...
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Re: I've had it with 727 fluid drainback....help
[Re: whiplash]
#14774
03/10/05 05:58 PM
03/10/05 05:58 PM
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Joined: Feb 2003
Posts: 7,982 Scranton, PA
Montclaire
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Quote:
no, I definately do not want a manual valve body. What issue of MA was that covered in?
I'll have to look. I think it was recent, but I read a whole stack of old ones the other night, so who knows...
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Re: I've had it with 727 fluid drainback....help
[Re: whiplash]
#14775
03/10/05 06:32 PM
03/10/05 06:32 PM
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Anonymous
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my 65 coronet has a 1966 street hemi converter' and my 69 r/t has the stock 11 3/4, both have drain back issues. 1996 ram 1500 truck, 318 auto, had the same issue. rick allison (a&a trans.) told me once it was a bushing (or something like that) that was loose or needed replaced. anyhow i didn't understand the technocolities .
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Re: I've had it with 727 fluid drainback....help
[Re: Montclaire]
#14777
03/10/05 06:59 PM
03/10/05 06:59 PM
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Joined: Oct 2003
Posts: 3,698 NE Oklahoma
Von
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I do believe you are experiencing "morning sickness". My 727 didnt do it before it was rebuilt, now it does. I have had two converters in it and it does the same as you describe with either converter, one a 3500 stall TCI 10 inch. Anyway, here is a link to a valve that is supposed to cure the problem. I dont know yet as I havent installed it, but its supposed to. http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&tc=photo&item=7959100006&category=33727Sorry for the ebay link, but thats the only place I can find the info. It doesnt spell it out in this ad, but Ive spoken with another tranny guy was selling the same kit who said that the kit "will" fix the converter drainback or morning sickness problem. Hope this helps.
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: I've had it with 727 fluid drainback....help
[Re: Von]
#14778
03/10/05 07:33 PM
03/10/05 07:33 PM
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Joined: Jun 2003
Posts: 9,225 Charleston
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where does that valve go? inside the trans or ???
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
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