518 TRANS WILL NOT WORK (HELP)
#1515548
10/11/13 05:56 PM
10/11/13 05:56 PM
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Joined: Mar 2007
Posts: 109 OHIO
BUBBAZ572
OP
MR. CAPS LOCK
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OP
MR. CAPS LOCK
Joined: Mar 2007
Posts: 109
OHIO
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91 DODGE DIESEL 518 OD TRANS REBUILT MY TRANS AND NOW IT WILL NOT MOVE INSTALLED SUNCOAST BILLIT CONVERTER AND A&A VALVE BODY WITH A HD CLUTCH KIT. I HAVE REBUILT OVER 100 OF THESE TRANSMISSIONS AND NEVER HAD THIS PROMLEM. THERE IS PRESSURE TO THE FRONT AND REAR SERVOS PROBLEM SOLVED WRONG PUMP,PUMP HAD 3 CHECK BALLS. NEED PUMP WITH 2 CHECK BALLS
Last edited by BUBBAZ572; 10/17/13 01:58 PM.
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Re: 518 TRANS WILL NOT WORK (HELP)
[Re: BUBBAZ572]
#1515552
10/12/13 11:33 AM
10/12/13 11:33 AM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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What about doing all of the air pressure checks with the rubber tipped air nozzle. From what I gathered you did do that for the servos & are there any other air checks that can be done? Otherwise it looks like it has to come back out
live every 24 hour block of time like it's your last day on earth
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Re: 518 TRANS WILL NOT WORK (HELP)
[Re: BUBBAZ572]
#1515556
10/12/13 05:44 PM
10/12/13 05:44 PM
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Joined: Jan 2003
Posts: 25,791 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,791
Rio Linda, CA
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There is pressure at the front and rear servos but how much pressure?
Even with broken drive tangs a pump can put out some pressure but not much.
The INTERNET, the MISinformation superhighway
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Re: 518 TRANS WILL NOT WORK (HELP)
[Re: 383man]
#1515558
10/14/13 02:13 PM
10/14/13 02:13 PM
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Joined: Mar 2007
Posts: 109 OHIO
BUBBAZ572
OP
MR. CAPS LOCK
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OP
MR. CAPS LOCK
Joined: Mar 2007
Posts: 109
OHIO
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135 PSI FRONT SERVO 165 PSI REAR SERVO WILL NOT MOVE IN ANY GEAR
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Re: 518 TRANS WILL NOT WORK (HELP)
[Re: PC-CHARGER]
#1515563
10/14/13 05:26 PM
10/14/13 05:26 PM
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Joined: Oct 2003
Posts: 2,537 PORT ALBERNI , BC., CANADA
superwrench
master
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master
Joined: Oct 2003
Posts: 2,537
PORT ALBERNI , BC., CANADA
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Quote:
If you are sure there are no issues in the overdrive section (e.g. problem with the direct clutch) then it's likely at the input end. Possibly a problem with the input spline on the new converter or an issue with the input shaft itself.
I'm thinking exactly as you on the direct clutch in the OD unit possibility. No direct clutch means no go....If he's got servo pressure then the pump must be doing something.
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Re: 518 TRANS WILL NOT WORK (HELP)
[Re: BUBBAZ572]
#1515566
10/14/13 08:49 PM
10/14/13 08:49 PM
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Joined: Jan 2003
Posts: 28,067 Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,067
Irving, TX
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Did you disassemble the VB? If so, did you get the selector lever back on the valve?
OOPS!!
I guess you did. If not, you wouldn't have pressure at the servos.
Perhaps a sprag failure allowing the guts to spin? Maybe dropped the link on the bands?
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: 518 TRANS WILL NOT WORK (HELP)
[Re: superwrench]
#1515567
10/15/13 05:57 PM
10/15/13 05:57 PM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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Quote:
Quote:
If you are sure there are no issues in the overdrive section (e.g. problem with the direct clutch) then it's likely at the input end. Possibly a problem with the input spline on the new converter or an issue with the input shaft itself.
I'm thinking exactly as you on the direct clutch in the OD unit possibility. No direct clutch means no go....If he's got servo pressure then the pump must be doing something.
I thought about the direct clutch but I dont believe it will cause his problem because there is an overrunning clutch in the overdrive unit that holds if the direct clutch slips. It is there so you dont get and rpm flare on the 3rd to overdrive shift when the direct clutch lets go and overdrive clutch comes in. I had a problem once where the 518 trans would slip in reverse but not drive and it had just been rebuilt by one of our techs. I found out he left a disc out of the direct clutch but it did not slip in drive just reverse because the overrunning clutch held in drive and in reverse it does not hold of course as the power goes thru just the direct clutch. It so happened this trans had updated parts and called for one more clutch disc but the tech did not count how many disc he took out and put back what the manual said as the update was a TSB. Ron
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