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what is the most likely probable fault

ever since I purchase this 20th back in 2007, when I ease into a curve, sometimes it slips.

I don't normally drive in "D" either.

the problem has been intermittent or just plain hit and miss but....... HAS NEVER gotten any worse.

thoughts on anything ?  linkages ect....

sometimes out of the blue I have to cycle the column shifter because going from P to D or R, I hear a buzzing noise, it clears when I shift out and back in most every single time.

thanks!  scott

what is the most likely probable fault

Reply #1 –
Sure you have enough tranny fluid in there?
Valvebody might be gummed up somewhere...if it just starts slipping out of nowhere but under acceleration it grabs gears good...it's losing fluid pressure and releasing clutch packs/bands until the pressure comes back. Either fluid sloshes away from the pickup/filter is plugged up/VB has an issue somewhere that's starving it of pressure/flow.

I feel like this is one of those instances of operating very close to a high/low threshold of the "process window" as people say at work...and just the right conditions push you over the edge into -ville.

The buzzing is the TV spring (or maybe just the actual valve itself). I have to look back at my Baumann shift kit manual, the word from them is that it's a resonant vibration that builds and causes that noise. The spring they supply you gets rid of it for good.
1987 20th Anniversary Cougar, 302 "5.0" GT-40 heads (F3ZE '93 Cobra) and TMoss Ported H.O. intake, H.O. camshaft
2.5" Duals, no cats, Flowmaster 40s, Richmond 3.73s w/ Trac-Lok, maxed out Baumann shift kit, 3000 RPM Dirty Dog non-lock TC
Aside from the Mustang crinkle headers, still looks like it's only 150 HP...
1988 Black XR7 Trick Flow top end, Tremec 3550
1988 Black XR7 Procharger P600B intercooled, Edelbrock Performer non-RPM heads, GT40 intake AOD, 13 PSI @5000 RPM. 93 octane

what is the most likely probable fault

Reply #2 –
I Never have that problem with a 5 SPEEDER!!!! Just kidding!! But i dont!!
I spend money I don't have, To build  cars I don't need, To impress people I don't know

HAVE YOU DRIVEN A FORD LATELY!!

what is the most likely probable fault

Reply #3 –
Quote from: TOM Renzo;438332
I Never have that problem with a 5 SPEEDER!!!! Just kidding!! But i dont!!

I don't agree with Tom often but he hit the nail on the head with this one.
41 Dodge Luxury Liner Sedan
78 F-100 2wd flareside
84Turbo Coupe
84 Thunderbird Élan
85 Thunderbird 3.8
88 Turbo Coupe
88 Mustang GT
90 Stang LX 5.0 5spd
93 F-150 4x4 ext cab
96 Mustang GT
98 Mustang GT
99 SVT Cobra
06 Fusion SEL
14 Fusion Sport

what is the most likely probable fault

Reply #4 –
LOL,, suck it!

what is the most likely probable fault

Reply #5 –
:burnout:  lol
41 Dodge Luxury Liner Sedan
78 F-100 2wd flareside
84Turbo Coupe
84 Thunderbird Élan
85 Thunderbird 3.8
88 Turbo Coupe
88 Mustang GT
90 Stang LX 5.0 5spd
93 F-150 4x4 ext cab
96 Mustang GT
98 Mustang GT
99 SVT Cobra
06 Fusion SEL
14 Fusion Sport

what is the most likely probable fault

Reply #6 –
Guys just some Humor. Have a great weekend . Drive those cars the weather is going to be great. And i am going to pound the pavement. Just saying.
I spend money I don't have, To build  cars I don't need, To impress people I don't know

HAVE YOU DRIVEN A FORD LATELY!!

what is the most likely probable fault

Reply #7 –
Every aod ive had slip at all shiznitthe bed quick, just saying.

When I swapped my t-5 in my old tbird, I went from not een being able to chirp the tires to spinning through all of first gear ona wot hit. It also started eating motor mounts, but thats more likely how I drive it then the cars fault.

With the availability of sn-95 t-5's in the junk yards, you couldeasily do the swap for less then $400.
Quote from: jcassity
I honestly dont think you could exceed the cost of a new car buy installing new *stock* parts everywhere in your coug our tbird. Its just plain impossible. You could revamp the entire drivetrain/engine/suspenstion and still come out ahead.
Hooligans! 
1988 Crown Vic wagon. 120K California car. Wifes grocery getter. (junked)
1987 Ford Thunderbird LX. 5.0. s.o., sn-95 t-5 and an f-150 clutch. Driven daily and going strong.
1986 cougar.
lilsammywasapunkrocker@yahoo.com

what is the most likely probable fault

Reply #8 –
Quote from: Haystack;438355
Every aod ive had slip at all shiznitthe bed quick, just saying.

When I swapped my t-5 in my old tbird, I went from not een being able to chirp the tires to spinning through all of first gear ona wot hit. It also started eating motor mounts, but thats more likely how I drive it then the cars fault.

With the availability of sn-95 t-5's in the junk yards, you couldeasily do the swap for less then $400.


yeah but its a 20th, cant be doing that. I want to preserve it.
only major change it has is the smog short belt, all original design is the intent., if any mods they can be reversed easily.

what is the most likely probable fault

Reply #9 –
The Standard coin tray fits nicely in the shifter hole location... ;).
Quote from: jcassity
I honestly dont think you could exceed the cost of a new car buy installing new *stock* parts everywhere in your coug our tbird. Its just plain impossible. You could revamp the entire drivetrain/engine/suspenstion and still come out ahead.
Hooligans! 
1988 Crown Vic wagon. 120K California car. Wifes grocery getter. (junked)
1987 Ford Thunderbird LX. 5.0. s.o., sn-95 t-5 and an f-150 clutch. Driven daily and going strong.
1986 cougar.
lilsammywasapunkrocker@yahoo.com

what is the most likely probable fault

Reply #10 –
No 5 speeder JAY??? BORING TO DRIVE Just me
I spend money I don't have, To build  cars I don't need, To impress people I don't know

HAVE YOU DRIVEN A FORD LATELY!!

what is the most likely probable fault

Reply #11 –
Quote from: TOM Renzo;438368
No 5 speeder JAY??? BORING TO DRIVE Just me


nascar enjoys stick shifts?

what is the most likely probable fault

Reply #12 –
Me 2 !!!
I spend money I don't have, To build  cars I don't need, To impress people I don't know

HAVE YOU DRIVEN A FORD LATELY!!

what is the most likely probable fault

Reply #13 –
I make it a habit to run about a half a quart more fluid than the max listed on the dipstick.  When was the last time the fluid was changed?  Might want to pull the valve body and give her a once over next time you do.  I had a stuck 1-2 shift valve once on one of my cars.  Car was stuck in first.
-- 05 Mustang GT-Whipplecharged !!
--87 5.0 Trick Flow Heads & Intake - Custom Cam - Many other goodies...3100Lbs...Low12's!
 

what is the most likely probable fault

Reply #14 –
Quote from: V8Demon;438457
I make it a habit to run about a half a quart more fluid than the max listed on the dipstick.

The guy that rebuilt my AOD told me to do that as well. Apparently the factory marking on the dipstick is just barely enough fluid. He said to go about 1/4"-1/2" above the hash marks on the dipstick with the transmission HOT. I forget how much fluid that was as I have a smaller torque converter than stock(9.5" PI Stallion).
88 Thunderbird LX: 306, Edelbrock Performer heads, Comp 266HR cam, Edelbrock Performer RPM intake, bunch of other stuff.