Re: 89 D150 A999 auto have electronic LU converter?
[Re: 383man]
#1595617
03/20/14 08:24 AM
03/20/14 08:24 AM
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98RAM1500
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Its a 3spd auto, so basically most of the 80's 904's & 999's where electronically controlled converters? Is there anything I can do to get rid of the electronic crap? Because im not wiring up a switch to turn it on & off. What years 904's do I need to look for that's not Electronic Lockup?
Last edited by 98RAM1500; 03/20/14 08:32 AM.
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Re: 89 D150 A999 auto have electronic LU converter?
[Re: scratchnfotraction]
#1595620
03/20/14 06:53 PM
03/20/14 06:53 PM
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383man
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From what I remember it should use a lock-up relay that is controlled by the PCM. That way the PCM know when its in 3rd gear and know the eng temp , TPS volts , vehicle speed and MAP volts to determine when to apply the lock-up. You can leave it unhooked and it just wont have the lock-up. On that year it will set a code but should not turn on the Ck Eng lite. Or you can use the lock-up which is a good idea for cruising as I believe there are some aftermarket kits around that will apply the lock-up by speed along with eng vac and temp. I dont know if the aftermarket kit will monitor TPS. Maybe someone will chime in who knows what company makes the kits, Ron
Last edited by 383man; 03/20/14 06:56 PM.
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Re: 89 D150 A999 auto have electronic LU converter?
[Re: 98RAM1500]
#1595621
03/20/14 07:30 PM
03/20/14 07:30 PM
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draginmopars
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A-999 they are hydraulic controlled.
we used to have to change the spring in the valve body to delay lock up
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Re: 89 D150 A999 auto have electronic LU converter?
[Re: 383man]
#1595624
03/21/14 05:39 PM
03/21/14 05:39 PM
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John_Kunkel
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No 3-speed Torqueflite has electrical lockup, only the OD trans has it.
The electrical connection on some late 904/999 is to unlock the converter only.
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Re: 89 D150 A999 auto have electronic LU converter?
[Re: John_Kunkel]
#1595625
03/21/14 07:51 PM
03/21/14 07:51 PM
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383man
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Quote:
No 3-speed Torqueflite has electrical lockup, only the OD trans has it.
The electrical connection on some late 904/999 is to unlock the converter only.
John what do you mean unlock only ? Heck my 88 pick-up had the 3 speed with the lock-up but they do call the relay the Part throttle unlock relay. Course how can you unlock it without it having a lock-up converter ?
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Re: 89 D150 A999 auto have electronic LU converter?
[Re: 383man]
#1595626
03/21/14 08:34 PM
03/21/14 08:34 PM
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John_Kunkel
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The converter locks up hydraulically with no electrical assist, it can unlock either hydraulically or on electrical command from the controller.
Of course, this is predicated on it being a lockup trans.
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Re: 89 D150 A999 auto have electronic LU converter?
[Re: John_Kunkel]
#1595627
03/22/14 12:40 AM
03/22/14 12:40 AM
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383man
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I agree but I always considered it electrical because from what I remember the solenoid has to be closed to close the bleed off vent or it wont build the pressure to move the valve. Not trying to make a big deal out of it but I just called it an electrical lock-up because of that. Thanks for the reply. Ron
Last edited by 383man; 03/22/14 12:42 AM.
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Re: 89 D150 A999 auto have electronic LU converter?
[Re: 383man]
#1595628
03/22/14 12:52 AM
03/22/14 12:52 AM
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98RAM1500
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So if I leave it unplugged what will happen?? will it lockup but then not unlock?? My friend (known him for 20 years) that owns the transmission shop told me that "If I left it unhooked then I will have no lockup at all and that it would shift like a regular 3spd" He's never steered me wrong before and has built trans for me in the past , plus the 40 years experience building transmissions that he has.
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Re: 89 D150 A999 auto have electronic LU converter?
[Re: 98RAM1500]
#1595629
03/22/14 02:45 AM
03/22/14 02:45 AM
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383man
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If you leave it unpluged it should not work and it will work as a standard converter. With it unhooked it wont build enough pressure to move the valve and it wont work the lock-up. Ron
Last edited by 383man; 03/22/14 02:45 AM.
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Re: 89 D150 A999 auto have electronic LU converter?
[Re: 383man]
#1595630
03/22/14 04:10 PM
03/22/14 04:10 PM
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John_Kunkel
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Simple enough to test for yourself, disconnect the wire and let it shift through the gears at very light throttle....watch the tach for an rpm drop after the 2-3 shift is complete or wait for the feel of the lockup.
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