1974 torino sport transmission |
Post Reply |
Author | |
hendy
New Member Joined: 29-July-2010 Location: Rochester,NY Status: Offline Points: 4 |
Post Options
Thanks(0)
Posted: 22-April-2011 at 1:10AM |
Before the car is warmed up the automatic transmission will only shift manually. After it warmed up it s seems ok. Anybody have any ideas for me? I'm just a weekend basics guy, but with the right direction, I'm hoping to fix this on my own....thanks
|
|
Billy C
Senior Member Joined: 10-February-2010 Location: Pittsburgh, PA Status: Offline Points: 947 |
Post Options
Thanks(0)
|
when my car is cold, it won't even go into gear (i shift to drive and it stays in neutral) for about 30 seconds. maybe 60k miles or so on my trans. i am running a C6.
Fluid level is the first/easiest thing to check. Not going to put it past a clogged filter or old gunky fluid, un-common, but ya never know. Also the vacuum modulator could be getting funky and old, not functioning properly. The vacuum modulator is the thing that tells the car when to shift based on the vacuum in the intake of your motor which changes based on load/power demand. That vac line or hose that goes from the motor to the modulator on the trans could be leaking and as the motor warms up the vacuum goes up and that leak becomes more irrelevant and less noticeable activating that modulator enough to kick it up through the gears. What motor/transmission combo are you running? It will help give tips on how to do a basic check on a few things, give you some exact locations on where to look. How used and abused is the setup (miles on the motor and trans)? Good luck
|
|
-Billy Conturo
|
|
75GranMan
Senior Member Joined: 05-April-2011 Location: Colchester, CT Status: Offline Points: 1225 |
Post Options
Thanks(0)
|
sounds more like hard seals in the clutch packs.when trans is cool,the seals are contracted,then as the trans starts to warm /build pressure the seals start to expand thus applying the clutch.you need to exactly note what gears are affected when the problem occurs. then find application chart for your trans type,and see clutches or bands are applied in the problem gear.most of the time you diag the concern just by reading the application chart.
|
|
John 75Gran Torino 4spd
|
|
Rockatansky
Senior Member Joined: 30-July-2010 Location: On The Road Status: Offline Points: 6059 |
Post Options
Thanks(0)
|
Yup, sounds like a classic case of Morning Sickness
What does AAMCO stand for?
All Automatics Must Come Out
you can try a seal conditioner product like Trans-Medic, might even 'fix' it for while but there's an overhaul comin up
|
|
72 GT Ute
|
|
Billy C
Senior Member Joined: 10-February-2010 Location: Pittsburgh, PA Status: Offline Points: 947 |
Post Options
Thanks(0)
|
wow, I was going to start off with the basics before pulling and ripping its guts out. I hate automatics, you need like 1000 friggin' specialty tools to rebuild them and have to keep track of 10000000 little clutches, bands, screws, gaskets, seals, planetary this, and governor that. I still forget the check valve ball for the vacuum mod on my carb when I rebuild it, I can't imagine how many damn parts id forget to put back into a tranns and then realize after I put it back together.
I am glad to hear what the more tranny savvy folks have to say about this. I was just making suggestions on the basics, hope I wasn't leading in the wrong direction. Just a question, when do the seals tend to go bad? |
|
-Billy Conturo
|
|
Rockatansky
Senior Member Joined: 30-July-2010 Location: On The Road Status: Offline Points: 6059 |
Post Options
Thanks(0)
|
the basics always apply but it's not a band adjustment. A-T's need good fluid at the correct level and vacuum to the modulator to operate. fluid in the mod hose is a sign that it needs replacing, and just because the hose is connected down below doesn't mean that it's not cracked or disconnected somewhere in between... but a cold / warm trans problem usually isn't vcuum related either.
seals harden up and shrink with age, leaky hard shrunken seals don't hold hydraulic pressure so good. old time remedy was a Psshht of Brake Fluid
|
|
72 GT Ute
|
|
Post Reply | |
Tweet |
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |