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reverse manual valve body engine flare up #1254879
06/21/12 04:39 AM
06/21/12 04:39 AM
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michigan
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6pakdakota Offline OP
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i have a reverse manual valve body 727 with no first gear engine braking. the trans was flawless until i burned up my shifter cable and drove the truck home in 3rd gear. i replaced the cable and now the engine flares up on the 2-3 shift under WOT. is there an adjustment i can make to fix this, or did i ruin my trans. i am collecting parts to do a 4 speed conversion in the next few weeks, but i would like to get this problem resolved so i can still drive the truck until then. thanks.

Re: reverse manual valve body engine flare up [Re: 6pakdakota] #1254880
06/21/12 06:26 AM
06/21/12 06:26 AM
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Posts: 9,863
MI, usa
dvw Offline
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If the cable is adjusted correctly then the 3rd/reverse clutch is damaged. I would double check the cable , pull the bolt that attaches the cable when it's in 3rd gear. The bolt should come out easily and not be in a bind when the adjustment is correct.
Doug

Re: reverse manual valve body engine flare up [Re: dvw] #1254881
06/21/12 08:30 AM
06/21/12 08:30 AM
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U.S.S.A.
JohnRR Offline
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Quote:

If the cable is adjusted correctly then the 3rd/reverse clutch is damaged. I would double check the cable , pull the bolt that attaches the cable when it's in 3rd gear. The bolt should come out easily and not be in a bind when the adjustment is correct.
Doug





Re: reverse manual valve body engine flare up [Re: 6pakdakota] #1254882
06/21/12 10:20 AM
06/21/12 10:20 AM
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Posts: 52,972
Romeo MI
MR_P_BODY Offline
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I would think your cable adjustment is wrong...
also while your at it re-adjust the bands when
your under there

Re: reverse manual valve body engine flare up [Re: MR_P_BODY] #1254883
06/21/12 02:59 PM
06/21/12 02:59 PM
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Posts: 13,247
Mt. Vernon, Ohio
dartman366 Offline
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re-adjust the band and that will probably fix the flair-up problem.


Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
Re: reverse manual valve body engine flare up [Re: dartman366] #1254884
06/21/12 03:51 PM
06/21/12 03:51 PM
Joined: Oct 2010
Posts: 156
michigan
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6pakdakota Offline OP
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Thanks for the replies, I will try to readjust
the shifter cable. How do I adjust the bands?

Re: reverse manual valve body engine flare up [Re: 6pakdakota] #1254885
06/21/12 03:57 PM
06/21/12 03:57 PM
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Romeo MI
MR_P_BODY Offline
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Each manufacture has their own spec but its torque
it to 72 in lbs then back off like 2 1/4 turns

Re: reverse manual valve body engine flare up [Re: dartman366] #1254886
06/21/12 04:36 PM
06/21/12 04:36 PM
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detroit area
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moderncylinder Offline
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you can tighten the band 1/2 turn and that will help it,, but you burned the front clutch pack up,, its applying late,, the band releases and and the clutch applies,, though late,, so it flares

Re: reverse manual valve body engine flare up [Re: moderncylinder] #1254887
06/21/12 07:00 PM
06/21/12 07:00 PM
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MI, usa
dvw Offline
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The band does applies nothing during the 3rd gear shift. It releases. A slip in 2nd gear would indicate a band problem. Follow my recomendations earlier. If it doesn't fix the problem it needs to come apart. They're easy to work on. Anyone who races should learn to do them. Save yourself a ton of money.
Doug

Re: reverse manual valve body engine flare up [Re: dvw] #1254888
06/21/12 09:00 PM
06/21/12 09:00 PM
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detroit area
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moderncylinder Offline
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doug,, the band is applied in 2nd gear,, it comes off the drum going into 3rd and the clutch applies,, if the cluth is slow to apply cause its worn out or loose it will flare the 2-3 gear change,, if the band is too tight it will pull down on the 2-3 gear change,, the timing of the band releasing and the foward clutch applying is something you just learn what works for your set up,, as to how many turns out your band is,, im at 2 1/4 turns out,,,, but i recently burned up the forward clutch and it flared in the 2-3,, i tightened the band 1/2 turn and it fixed it,, took trans apart and the clutches were smoked,, causing a delay in it applying,, which is why,,, it flared..

Re: reverse manual valve body engine flare up [Re: moderncylinder] #1254889
06/22/12 02:09 AM
06/22/12 02:09 AM
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366 Offline
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Quote:

doug,, the band is applied in 2nd gear,, it comes off the drum going into 3rd and the clutch applies,, if the cluth is slow to apply cause its worn out or loose it will flare the 2-3 gear change,, if the band is too tight it will pull down on the 2-3 gear change,, the timing of the band releasing and the foward clutch applying is something you just learn what works for your set up,, as to how many turns out your band is,, im at 2 1/4 turns out,,,, but i recently burned up the forward clutch and it flared in the 2-3,, i tightened the band 1/2 turn and it fixed it,, took trans apart and the clutches were smoked,, causing a delay in it applying,, which is why,,, it flared..


been there done that, yes you probably hurt the high gear clutch eather burn't it or wore it enough to change the timing of the shift event.


Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
Re: reverse manual valve body engine flare up [Re: dartman366] #1254890
06/22/12 02:23 AM
06/22/12 02:23 AM
Joined: Nov 2004
Posts: 3,517
pacific northwest
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Stroker Scamp Offline
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Quote:

Quote:

doug,, the band is applied in 2nd gear,, it comes off the drum going into 3rd and the clutch applies,, if the cluth is slow to apply cause its worn out or loose it will flare the 2-3 gear change,, if the band is too tight it will pull down on the 2-3 gear change,, the timing of the band releasing and the foward clutch applying is something you just learn what works for your set up,, as to how many turns out your band is,, im at 2 1/4 turns out,,,, but i recently burned up the forward clutch and it flared in the 2-3,, i tightened the band 1/2 turn and it fixed it,, took trans apart and the clutches were smoked,, causing a delay in it applying,, which is why,,, it flared..


been there done that, yes you probably hurt the high gear clutch eather burn't it or wore it enough to change the timing of the shift event.



if a clutch was burnt or worn could you tell if you dropped the pan?


footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip
73 Duster 340 street strip 12.79 @ 105
Re: reverse manual valve body engine flare up [Re: Stroker Scamp] #1254891
06/22/12 02:37 AM
06/22/12 02:37 AM
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366 Offline
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dartman366  Offline
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Mt. Vernon, Ohio
Quote:

Quote:

Quote:

doug,, the band is applied in 2nd gear,, it comes off the drum going into 3rd and the clutch applies,, if the cluth is slow to apply cause its worn out or loose it will flare the 2-3 gear change,, if the band is too tight it will pull down on the 2-3 gear change,, the timing of the band releasing and the foward clutch applying is something you just learn what works for your set up,, as to how many turns out your band is,, im at 2 1/4 turns out,,,, but i recently burned up the forward clutch and it flared in the 2-3,, i tightened the band 1/2 turn and it fixed it,, took trans apart and the clutches were smoked,, causing a delay in it applying,, which is why,,, it flared..


been there done that, yes you probably hurt the high gear clutch eather burn't it or wore it enough to change the timing of the shift event.



if a clutch was burnt or worn could you tell if you dropped the pan?


usually if it is burn't the fluid will have a burn't smell and will not have that pretty red color to it may have some dark looking residue in the pan, if it's burn't bad enough you will know pretty quickly by smell alone, dissasembly will verify wear as the clutch clearance will have opened up.


Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
Re: reverse manual valve body engine flare up [Re: dartman366] #1254892
06/22/12 06:04 PM
06/22/12 06:04 PM
Joined: Oct 2010
Posts: 156
michigan
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6pakdakota Offline OP
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I adjusted the shifter cable and it seems to have fixed the problem.
Thanks for your help everyone







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