Re: 518 delayed 2-3 shift woes continue
[Re: 451Mopar]
#929658
02/19/11 08:04 PM
02/19/11 08:04 PM
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Joined: Oct 2005
Posts: 1,305 Lakewood, Colorado
herkamer
OP
pro stock
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OP
pro stock
Joined: Oct 2005
Posts: 1,305
Lakewood, Colorado
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Tried backing the band off 1/4 turn. No difference at all. When building it, I did air test everything and it sounded solid. Obviously there is something causing issues.
I guess it's time to go back inside of this thing. I do have a stock valve body I could try, but was hoping not to have to be in and out of the unit several times.
Matt 69 Dart Swinger 340 83 W350, Megasquirted with 46RH Old news: 72 Demon street/race mobile Latest: 70 Duster backhalf car and even more
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Re: 518 delayed 2-3 shift woes continue
[Re: herkamer]
#929659
02/20/11 07:21 AM
02/20/11 07:21 AM
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Joined: Jan 2003
Posts: 26,470 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 26,470
Rio Linda, CA
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When you remove the VB take the end plate off and check the 2-3 shift valve and plug for freedom of movement.
The INTERNET, the MISinformation superhighway
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Re: 518 delayed 2-3 shift woes continue
[Re: BigBlockMopar]
#929661
04/25/14 11:00 AM
04/25/14 11:00 AM
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Joined: Oct 2005
Posts: 1,305 Lakewood, Colorado
herkamer
OP
pro stock
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OP
pro stock
Joined: Oct 2005
Posts: 1,305
Lakewood, Colorado
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Suppose I should have updated this; Mine is resolved, problem was the KD linkage was not completely forward with no throttle. It was only pushed back slightly and that was enough to cause an issue. I had to pull the pan to see this.
Matt 69 Dart Swinger 340 83 W350, Megasquirted with 46RH Old news: 72 Demon street/race mobile Latest: 70 Duster backhalf car and even more
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Re: 518 delayed 2-3 shift woes continue
[Re: BigBlockMopar]
#929663
04/25/14 10:39 PM
04/25/14 10:39 PM
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Joined: Mar 2006
Posts: 9,973 MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,973
MI, usa
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Quote:
Thanks for your update. I wonder if that could be the case with my tranny aswell, as I have preloaded the KD-linkage slightly to make 1-2 shifts occur at a better time (around 10mph instead of 5mph).
If been wondering if the KD-lever on the tranny has the correct length for the throttle linkage on the carb ('73 318 2-bbl).
Not sure which would be the correct lever since the combo isn't stock. I would bet if the KD linkage is O.E. it should have the O.E. 318 lever. There are at least 2 different length levers availible during that vintage that will change the geometry. Also important to have the light spring pulling the linkage up snug to the carb stud. Doug
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Re: 518 delayed 2-3 shift woes continue
[Re: BigBlockMopar]
#929666
08/03/14 06:45 PM
08/03/14 06:45 PM
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Joined: Jan 2003
Posts: 3,575 The Netherlands
BigBlockMopar
master
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master
Joined: Jan 2003
Posts: 3,575
The Netherlands
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I'm updating this topic as today I've managed to alter the KD(TP) lever on the transmission to a slightly longer one. Reason for this mod was that the 1-2 shift at WOT were also a bit late. Now with the longer lever this seems to have improved. But, (on the contrary to what I mentioned in my post above) throttle-position does NOT alter the 2-3 shift. Nor hot or cold. The trans still does the 2-3-shifts around 30mph. (There's a 3.91 gearratio in the rearaxle) Some more info; - With light throttle, the 2-3 upshifts are very late. - With moderate/firm throttle, 2-3 upshift timing feels correct, right on time. - Shifts themselves are nice and crisp. - 3-2 Kickdown always seems to work good and as expected. - Reverse gear engagement always is very soft. My gut feeling says there's leakage somewhere in the transmission and internal oilpressure needs to come up to a certain pressure or flow before the 2-3 shift is initiated. I don't mind getting into the transmission or valvebody to fix this issue, but I do like to know what to fix so the problem is actually cured after that. I hate just throwing new parts at some issue, but I'm thinking of getting either or both these items (unless someone here can pinpoint the issue to one part); - #518RED16. Sonnax, Dodge 16% Oversize Intermediate Super Servo. - http://atransmission.info/518-throttle-valve-kit.htmlAny help would be appreciated.
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Re: 518 delayed 2-3 shift woes continue
[Re: BigBlockMopar]
#929667
08/03/14 08:55 PM
08/03/14 08:55 PM
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Joined: Jan 2003
Posts: 12,801 Benton, IL.
DaveRS23
Master of nothing...
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Master of nothing...
Joined: Jan 2003
Posts: 12,801
Benton, IL.
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One more thing you may try before opening it up; Try putting a spring on the KD lever on the tranny so that it will be pulled all the way off. I have fought this issue myself when the return spring on the KD lever at the carb had broken and I didn't know it. When the KD linkage wasn't being pulled all the way closed, my tranny did some really weird late upshift stuff. Some of it in 1-2 but most of it was in the 2-3.
Master, again and still
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Re: 518 delayed 2-3 shift woes continue
[Re: BigBlockMopar]
#929669
08/04/14 11:54 AM
08/04/14 11:54 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Just WAG ing here but would a softer spring in front of the 2-3 shift valve let it shift earlier? It'd sure be easier to go into the VB (if that sounds like a good possibility) than to pull the trans
live every 24 hour block of time like it's your last day on earth
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Re: 518 delayed 2-3 shift woes continue
[Re: BigBlockMopar]
#929671
08/04/14 12:39 PM
08/04/14 12:39 PM
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Joined: Jan 2003
Posts: 12,801 Benton, IL.
DaveRS23
Master of nothing...
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Master of nothing...
Joined: Jan 2003
Posts: 12,801
Benton, IL.
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Any chance you have a stock VB just to try? That would narrow down the choices.
Master, again and still
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Re: 518 delayed 2-3 shift woes continue
[Re: BigBlockMopar]
#929673
11/17/14 09:51 AM
11/17/14 09:51 AM
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Joined: Jan 2003
Posts: 3,575 The Netherlands
BigBlockMopar
master
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master
Joined: Jan 2003
Posts: 3,575
The Netherlands
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Topic update; For anyone out there is still in deep worries and having sleepness nights about this issue it turned out to be a linkage issue afterall as well in my case. The horizontal rod on the transmission going from the KD-lever to the bellcrank was too long. This caused the rod to contact the bellcrank shaft at full forward/relaxed position, and prevent the KD-valve in the transmission from totally releasing. I put an extra bend in the rod to shorten it which freed up the linkage quite a bit already. It still needs to be slightly shorter as the bellcrank's upper leg is almost in it's upright position, almost causing to overcenter the vertical rod going up to the engine bellcrank.
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