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driving my 904 with no kickdown lever attached
#1043931
07/31/11 03:37 PM
07/31/11 03:37 PM
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Joined: Jan 2009
Posts: 124
Pittsburgh, PA
bigdaddywiz
OP
member
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OP
member
Joined: Jan 2009
Posts: 124
Pittsburgh, PA
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after getting my car back together and running, i have everything but the lokar cable needed for my setup (4bbl/340 intake on my 318) for kickdown on the 904. now, i know this can cause damage if not driven lightly, but i decided to take the car out a few times around the area to make sure everything is good, which it is.
i've read that the kickdown linkage governs the amount of fluid pressure in the trans. a thing i noticed on my linkage when it was stock was that the kickdown linkage did not even move until the throttle was at or near WOT...so with that in mind i took it out a few times with NO linkage hooked up to my new setup...
i am NOT taking it on the highway.
i am NOT make WOT runs.
i am gently easing into the throttle, maybe only getting to half throttle and the car shifts normally as it always has.
i never get myself into a situation where i would make the car lug in a higher gear and not allowing it to downshift.
so in short, i've been taking it easy. i have a lokar cable on the way. am i doing damage?
thanks
73 Road Runner
09 Challenger R/T
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Re: driving my 904 with no kickdown lever attached
[Re: bigdaddywiz]
#1043932
07/31/11 03:43 PM
07/31/11 03:43 PM
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Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
1_WILD_RT
Management Trainee
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Management Trainee
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
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If you must drive it find a way to hold the lever on the trans half way back, bailing wire, zip tie... Whatever..
"The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."
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Re: driving my 904 with no kickdown lever attached
[Re: MoparforLife]
#1043935
07/31/11 05:58 PM
07/31/11 05:58 PM
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Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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I don't know why it worked....but it did. I drove my car for 10,000 miles without any problems, without that hooked up. never got it to work right, always shifted way too early no matter how I hooked it up. I ultimatly just drove it like a manual valve body and would control the shifts by manually shifting from 1, 2, D, while driving.
maybe forcing the shifts with the manually shifting saved the trans, I don't know.
all I know is that the transmission never fried itself, and the fluid was always nice and red, never slipped etc.
worked great till my brake booster developed a vacuum leak, caused half the motor to go lean, and I burnt 3 exhaust valves. that's when I pulled it all apart to start the restoration
**Photobucket sucks**
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Re: driving my 904 with no kickdown lever attached
[Re: 70Cuda383]
#1043936
07/31/11 06:20 PM
07/31/11 06:20 PM
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Joined: Jan 2003
Posts: 25,858
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,858
Rio Linda, CA
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Quote:
I don't know why it worked....but it did. I drove my car for 10,000 miles without any problems, without that hooked up. never got it to work right, always shifted way too early no matter how I hooked it up. I ultimatly just drove it like a manual valve body and would control the shifts by manually shifting from 1, 2, D, while driving.
Another classic example of the difference between doing it wrong and getting away with it and doing it right. Some people are just luckier than others.
The INTERNET, the MISinformation superhighway
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Re: driving my 904 with no kickdown lever attached
[Re: John_Kunkel]
#1043937
07/31/11 06:51 PM
07/31/11 06:51 PM
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Joined: Jan 2003
Posts: 25,200
Upper Midwest
MoparforLife
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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Quote:
Quote:
I don't know why it worked....but it did. I drove my car for 10,000 miles without any problems, without that hooked up. never got it to work right, always shifted way too early no matter how I hooked it up. I ultimatly just drove it like a manual valve body and would control the shifts by manually shifting from 1, 2, D, while driving.
Another classic example of the difference between doing it wrong and getting away with it and doing it right. Some people are just luckier than others.
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Re: driving my 904 with no kickdown lever attached
[Re: John_Kunkel]
#1043938
07/31/11 10:09 PM
07/31/11 10:09 PM
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Joined: Sep 2009
Posts: 928
NC
SLOW67
super stock
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super stock
Joined: Sep 2009
Posts: 928
NC
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Quote:
Quote:
I don't know why it worked....but it did. I drove my car for 10,000 miles without any problems, without that hooked up. never got it to work right, always shifted way too early no matter how I hooked it up. I ultimatly just drove it like a manual valve body and would control the shifts by manually shifting from 1, 2, D, while driving.
Another classic example of the difference between doing it wrong and getting away with it and doing it right. Some people are just luckier than others.
When I first got into mopars.....at 16 I didn't know any better and burned up two 904s by not having the kickdown on. Even wired half way open and shifting it manually my little 273 ate 2nd gear after about 200 miles in my Valiant. I guess some people get lucky but I'm not trying it again 
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Re: driving my 904 with no kickdown lever attached
[Re: bigdaddywiz]
#1043939
07/31/11 11:54 PM
07/31/11 11:54 PM
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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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What RT said, halfway back & only minimum throttle shifts & try & stay away from driving (it) as much as you can till the parts come in
live every 24 hour block of time like it's your last day on earth
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Re: driving my 904 with no kickdown lever attached
[Re: MarkZ]
#1043941
08/01/11 09:23 AM
08/01/11 09:23 AM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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 thats how i learned about throttle pressure linkage lose 2nd..tighten band...lose 2nd...tighten band...lose 2nd tighten band... eat the drum up and fill with metal shavings...change trans.. took a couple to learn though..i is slow in the brain  now I got a manual VB put in and it locks up going into 2nd and 3rd,and here I thought i could just bolt in a manual VB and have no linkage...  I be R&R it and going back stock with a throttle pressure linkage set up  so see...it is best to have it from the get go and leave it alone after its adjusted and set correctly.  good luck trans hunting in the JY 
Last edited by scratchnfotraction; 08/01/11 09:26 AM.
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Re: driving my 904 with no kickdown lever attached
[Re: bigdaddywiz]
#1043942
08/01/11 09:35 AM
08/01/11 09:35 AM
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Joined: Jul 2008
Posts: 30,450
Florida STAYcation
dOoC
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,450
Florida STAYcation
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Quote:
so in short, i've been taking it easy. i have a lokar cable on the way. am i doing damage?
thanks
I say .... Absolutely NOT. But I would say a max of 1/4 throttle would be the only safe-zone. And taking it on the highway - 60 mph - even less of a prob.
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Re: driving my 904 with no kickdown lever attached
[Re: dOoC]
#1043943
08/01/11 04:26 PM
08/01/11 04:26 PM
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Joined: Jan 2009
Posts: 124
Pittsburgh, PA
bigdaddywiz
OP
member
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OP
member
Joined: Jan 2009
Posts: 124
Pittsburgh, PA
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thank everyone...i've had it out for way more than 40 miles! you must have been hammering on it for it to fail with just that many miles! no signs of failure, no slipping, shifts fine...with that said though, i aint driving it till i get the lokar cable installed  some of your posts scared me!! i still dont understand how if the arm never moved until at full throttle originally, how would i be doing damage now if i stayed below half throttle?
Last edited by bigdaddywiz; 08/01/11 04:28 PM.
73 Road Runner
09 Challenger R/T
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Re: driving my 904 with no kickdown lever attached
[Re: bigdaddywiz]
#1043944
08/01/11 04:49 PM
08/01/11 04:49 PM
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Joined: Jul 2008
Posts: 30,450
Florida STAYcation
dOoC
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,450
Florida STAYcation
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Quote:
i still dont understand how if the arm never moved until at full throttle originally, how would i be doing damage now if i stayed below half throttle?
The arm moves ALL THE TIME .. not just WOT. IF you have a 100 psi gauge ...hook-it-up to the middle port on the pass side .. just above the pan rail. What kind of psi do you have ?
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Re: driving my 904 with no kickdown lever attached
[Re: bigdaddywiz]
#1043945
08/01/11 04:49 PM
08/01/11 04:49 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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it moves as the throttle lever moves and at the same time/rate/distance it will raise the pressure as the rpm goes up to hold the clutches from slipping. when the carb hits WOT so should the tranz lever,it should be most of the way back to all the way back,dont let it go back so far it wont let the carb get WOT...thats too much!  I think?
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Re: driving my 904 with no kickdown lever attached
[Re: bigdaddywiz]
#1043946
08/01/11 04:51 PM
08/01/11 04:51 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Quote:
thank everyone...i've had it out for way more than 40 miles! you must have been hammering on it for it to fail with just that many miles!
no signs of failure, no slipping, shifts fine...with that said though, i aint driving it till i get the lokar cable installed
some of your posts scared me!!
i still dont understand how if the arm never moved until at full throttle originally, how would i be doing damage now if i stayed below half throttle?
The "kickdown" linkage moves the instant the throttle is applied if adjusted correctly and increases pressure to ensure the clutches don't slip. Even a little pressure increase helps.
It may not be slipping now, but it's real easy to damage the clutch packs when driving without a "kickdown"
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Re: driving my 904 with no kickdown lever attached
[Re: AARCONV]
#1043948
08/02/11 07:47 PM
08/02/11 07:47 PM
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Joined: Jan 2008
Posts: 3,886
Lost and Spaced
bboogieart
master
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master
Joined: Jan 2008
Posts: 3,886
Lost and Spaced
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Yep has to be on and has to be adjusted right. Guess how I know. I did what you are doing. A year later I was putting another trans in.  I know same old song. But Tis True Tis true!!!
I have mechanical Aptitude.
I can screw up anything.
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Re: driving my 904 with no kickdown lever attached
[Re: SLOW67]
#1043955
08/02/11 11:29 PM
08/02/11 11:29 PM
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Joined: Feb 2005
Posts: 5,221
Branson, Mo.
joedust451
super gas
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super gas
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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Quote:
Quote:
Quote:
I don't know why it worked....but it did. I drove my car for 10,000 miles without any problems, without that hooked up. never got it to work right, always shifted way too early no matter how I hooked it up. I ultimatly just drove it like a manual valve body and would control the shifts by manually shifting from 1, 2, D, while driving.
Another classic example of the difference between doing it wrong and getting away with it and doing it right. Some people are just luckier than others.
When I first got into mopars.....at 16 I didn't know any better and burned up two 904s by not having the kickdown on. Even wired half way open and shifting it manually my little 273 ate 2nd gear after about 200 miles in my Valiant. I guess some people get lucky but I'm not trying it again
The exact same thing happened 2 me back in the 80s when i got into Mopars, burned 2nd. gear in a 904, then burned 2nd. gear in a 727, I learned my lesson, still raced it alot on the streets, went from 1st. too 3rd & still won alot, Top end on that 340 was great, at one time i push it to about 130 then backed out.
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Re: driving my 904 with no kickdown lever attached
[Re: BDW]
#1043957
08/03/11 11:33 PM
08/03/11 11:33 PM
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Joined: Feb 2005
Posts: 5,221
Branson, Mo.
joedust451
super gas
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super gas
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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Quote:
Thx for the reply, I guess my MVB doesn't need the linkage, been driving it without for 10yrs. Hope I'm not just 1 of the lucky ones.
Your not, You no longer need the KD with a MVB, the line pressure stay around 200 at all time, so don't sweat it, your good.
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