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Author
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Topic: AOD Trouble
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Russ3747
Journeyman Posts: 20
From: Burlington, NC
Registered: Jan 2004
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posted 01-07-2004 06:44 PM
   
I have a 93 GT Conv. with an AOD mostly stock, with a turbo coupe disk break rear end (3.73) on my way to work this morning I lost all power in 4th gear or OD. It acks like its in N untell it slows to around 20 mph then it will down shift. It seems to be ok if left in Drive but I really need my OD I drive alot on the highway. does this mean I need a Trans?------------------
Triple Black 93 GT Conv.
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Moneymaker
Administrator Posts: 21844
From: Lyons, IL, USA
Registered: May 99
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posted 01-07-2004 07:04 PM
Welcome to M&M 
Unfortunatley, yes you do.
The OD lock up clutches are smoked.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,&'03
First SS/MA in the TENS!
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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Russ3747
Journeyman Posts: 20
From: Burlington, NC
Registered: Jan 2004
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posted 01-07-2004 07:17 PM
Is it safe to drive the car in drive, or will this cause more damage? If I am going to have to take it out is there a way to get a gear position for 2nd? Before it did not like to shift into 4th at WOT is there a fix? Does anyone know about manual valve bodies? (this is my daily driver/weekend racer) ------------------
Triple Black 93 GT Conv.
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GTRocks
Gearhead Posts: 2854
From: Lusby, MD
Registered: Jun 99
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posted 01-09-2004 04:40 PM
Awww, man. That is EXACTLY what happened to mine. I only had 60k on mine. You'll need a rebuild. I was told that they thought (without opening it) it was the clutch pacs. Minimum cost was $600. If I wanted to update it with shift kits, etc. it could run up to $2k depending what I wanted done.I took my $600 and did an AOD to T5 conversion. I like shifting better, and that's the one part of that car that I never liked anyway. I don't think you'd easily be able to add a 2nd, but this isn't my area of expertise either. I can tell you that I drove it daily (mine's my daily driver also) for another 20k miles in the D position with no noted additional issues. It was still working when I pulled it out to do the swap.
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BorgMoose7of9
Journeyman Posts: 23
From: Aloha, Oregon, 97006
Registered: Apr 2003
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posted 01-18-2004 12:19 AM
The overdrive band is toast. The OD band is separate from the drive direct clutch basket, so you can drive it in D for up to even 100K just like GTrocks.
Yes, the OD band is in the tranny, just behind the front pump, requiring tranny removal to repair it. Most basic AOD tranny rebuilds run around $1500-$2500 at most shops(if they are done right....the direct clutch pack is next in line to fail, by the way....both of these problems are the two biggest problems with AOD's).
If you do get a rebuild, I would seriously suggest following the other advice and tossing a 5-speed into it, and ditching the AOD...the AOD is a money pit.
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Russ3747
Journeyman Posts: 20
From: Burlington, NC
Registered: Jan 2004
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posted 01-20-2004 12:15 PM
I have been pretty pleased with the AOD I got the car with 100k miles on it and now its got 127k miles. I am now looking for something else to drive till I can get the GT fixed, But this spring will I be able to run at my local 1/8 track, or am I likely to blow it up at the stageing lanes, and piss off the officals?
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BorgMoose7of9
Journeyman Posts: 23
From: Aloha, Oregon, 97006
Registered: Apr 2003
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posted 01-21-2004 08:42 PM
If you don't have alot of beans in front of it, It might be okay to run, but it is going to be a dog if you are running stock gears on an 1/8th mile track. Make sure you have a giant stacked plate cooler(not the aluminum finned unit....they are turds) AFTER the engine tranny/radiator cooler. I don't know if you mean to run the wounded AOD you have now out there on the track, but the O/D band clutch material that came off when it went toast is running around in the valve body, gumming up the valves, so it needs to come apart eventually.
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Russ3747
Journeyman Posts: 20
From: Burlington, NC
Registered: Jan 2004
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posted 01-22-2004 08:40 AM
yes I was talking about running the "wounded AOD" I ran it last fall with the stock 2.73 and its best run was 10.27 @ 71.53 with 2.319 60 foot time. but now I have 3.73 gears so I would like to know how much it picked up? Should I change the fluid? I have heard that sometimes changing the fluid can make them slip more. ------------------
Triple Black 93 GT Conv.
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GTRocks
Gearhead Posts: 2854
From: Lusby, MD
Registered: Jun 99
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posted 01-22-2004 06:05 PM
I changed my fluid and filter twice, with no effect.
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itlbrnmoff
Gearhead Posts: 1609
From: Indianapolis,IN.USA
Registered: Nov 2002
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posted 02-08-2004 10:39 AM
quote:
Originally posted by Russ3747:
yes I was talking about running the "wounded AOD" I ran it last fall with the stock 2.73 and its best run was 10.27 @ 71.53 with 2.319 60 foot time. but now I have 3.73 gears so I would like to know how much it picked up? Should I change the fluid? I have heard that sometimes changing the fluid can make them slip more.
That's only on a GM when the only thing keeping up fluid pressure is the dirty fluid.  ------------------
'83 Mustang GT T/tops 306, 5-speed, 3.45 trac-loc, 650 dbl. pmpr. RPM intake, headers, 2 1/2" exhaust, 2 chamber Flowmasters = LOUD....
'88 Lincoln Mark VII LSC 5.0 HO, AOD, leather, A/C, 3.27 trac-loc...
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