Re: Lock Up Torque Converter???
[Re: DougR]
#2145688
09/01/16 09:17 PM
09/01/16 09:17 PM
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Joined: Jan 2008
Posts: 3,886 Lost and Spaced
bboogieart
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master
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Lost and Spaced
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I can't answer your question as applies to application, but will add this...
I would not put a used torque converter in there being it is all apart now.
Cheap insurance in my mind.
I have mechanical Aptitude. I can screw up anything.
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Re: Lock Up Torque Converter???
[Re: DougR]
#2145691
09/01/16 09:23 PM
09/01/16 09:23 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
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Lincoln Nebraska
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However, it also has a short non-splined section on the front of the input shaft and a hole in the center of the shaft. According to another thread on this forum, this makes it a lock up model. definitely a lockup, cant find my notes on the spline count
live every 24 hour block of time like it's your last day on earth
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Re: Lock Up Torque Converter???
[Re: DougR]
#2146082
09/02/16 12:45 PM
09/02/16 12:45 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
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since high power/torque is not an issue, it appears the lock up 904+converter I have can be used as is. I believe so & I saw some info way back on modding that system which might not be needed for your app but FYI it is out there somewhere
live every 24 hour block of time like it's your last day on earth
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Re: Lock Up Torque Converter???
[Re: DougR]
#2146129
09/02/16 01:43 PM
09/02/16 01:43 PM
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Joined: Jan 2003
Posts: 75,282 A gulag near you.
JohnRR
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I was under the impression lock up TC's needed a computer to make them work. I now see this is the case for late model drivetrains, but back in the 80's, TF's had fully internal hydraulic lock up controls. Since high power/torque is not an issue, it appears the lock up 904+converter I have can be used as is. Yes the early lockups were hyd. control totally and it was not a very good setup/application from what I remember of the Lebaron and Gran Fury I had.
Mainstream Media is the new Pravda
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Re: Lock Up Torque Converter???
[Re: DougR]
#2146718
09/03/16 11:51 AM
09/03/16 11:51 AM
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Joined: Jun 2008
Posts: 1,822 Colorado
denfireguy
top fuel
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top fuel
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Colorado
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A999 lockup transmission. The good news is that they have the lower first gear for a bit faster launch. The bad news is that there is a TSB for shudder on these as the lockup occurs. Unfortunately the parts for the fix are no longer available. This kit has the fix built into it: http://www.ebay.com/itm/A904-A727-SUPERI...135.m2548.l4275I used it for the shudder fix, tossed the rest. Used the Transgo shift kit TF2 to do the normal shift kit fixes on the transmission. I did this 4 years ago and it is still running well. If you drop the valve body, it will have a growth on the top side that channels the fluid to the lockup circuit so valve bodies will not interchange to the 904. BTW, I did change the the torque converter as was suggested before. Craig
Last edited by denfireguy; 09/03/16 12:14 PM.
2014 Ram 1500 Laramie, 73 Cuda Previous mopars: 62 Valiant, 65 Fury III, 68 Fury III, 72 Satellite, 74 Satellite, 89 Acclaim, 98 Caravan, 2003 Durango Only previous Non-Mopar: Schwinn Tornado
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Re: Lock Up Torque Converter???
[Re: gch]
#2146727
09/03/16 12:07 PM
09/03/16 12:07 PM
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Joined: Jun 2008
Posts: 1,822 Colorado
denfireguy
top fuel
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My 86 D150 has a lockup converter.Can it be deleted without a full blown rebuild? There are physical differences between the two transmissions. A full blown rebuild to non lockup is not possible, you will have to swap transmissions. Craig
2014 Ram 1500 Laramie, 73 Cuda Previous mopars: 62 Valiant, 65 Fury III, 68 Fury III, 72 Satellite, 74 Satellite, 89 Acclaim, 98 Caravan, 2003 Durango Only previous Non-Mopar: Schwinn Tornado
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Re: Lock Up Torque Converter???
[Re: DougR]
#2147796
09/05/16 03:27 AM
09/05/16 03:27 AM
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Joined: Jan 2004
Posts: 8,653 fredericksburg,va
cudaman1969
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fredericksburg,va
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Good info, I have two, van and truck 84 or 85. I guess I'll rob the low gear sets and stick them in an early trans. What is the best 904 case? You can use a toggle switch to turn on the lock up, did this on my 92 diesel, it eat tps switches like candy. Wait, that was over drive, never mind.
Last edited by cudaman1969; 09/05/16 03:28 AM.
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Re: Lock Up Torque Converter???
[Re: DougR]
#2150480
09/08/16 05:28 PM
09/08/16 05:28 PM
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Joined: Jan 2003
Posts: 26,530 Rio Linda, CA
John_Kunkel
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Rio Linda, CA
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Using the correct fluid will often stop the shuddering on converter lockup. Try the newer +4 fluid.
If it doesn't, a change to a heavier spring in the lockup valve will raise the road speed at which lockup occurs and prevent shudder.
The INTERNET, the MISinformation superhighway
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Re: Lock Up Torque Converter???
[Re: DougR]
#2151190
09/09/16 06:05 PM
09/09/16 06:05 PM
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Joined: Jan 2003
Posts: 781 usa
Mopar1970440
super stock
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super stock
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usa
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I have an 86 D150 and it has a one wire electrical plug going in thru the main case close to where the tail shaft bolts on to the main case of the trans. It has one solenoid mounted to the valvebody. Im told this confirms its a lockup trans. Hope that helps!
Last edited by Mopar1970440; 09/09/16 06:08 PM.
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Re: Lock Up Torque Converter???
[Re: Mopar1970440]
#2151551
09/10/16 11:30 AM
09/10/16 11:30 AM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
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I have an 86 D150 and it has a one wire electrical plug going in thru the main case close to where the tail shaft bolts on to the main case of the trans. It has one solenoid mounted to the valvebody. Im told this confirms its a lockup trans. Hope that helps! If its a round connector at the left rear of the trans then yes it sounds like it is lock-up. I believe that model also uses a relay for the lock-up as they called the relay a part throttle unlock relay but it locks and unlocks the converter and the relay is controlled by the PCM (eng controller). The relay should be mounted on the firewall and it sends power to the lock-up solenoid in the trans as the solenoid on that one is grounded in the trans as it only has the one power wire to it from the relay. Ron
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