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post #1 of 9 (permalink) Old 03-01-2013, 11:47 AM Thread Starter
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transmission problem?

I'm new to this site. I have a 1994 cougar Xr7. for a while now the transmission has been acting funny. When i put it to the floor at a low speed it will slip out of second and slam into third. But lately when i am going about 50 mph and put it to the floor it will just stumble and seem like there's nothing there. Some people have told me that it wont down shift and replace the whole transmission. i'm wondering if anyone has had a similar problem or if there's a easy fix
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post #2 of 9 (permalink) Old 03-01-2013, 02:00 PM
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I would try cleaning the MAF and maybe disconnecting it first and see what happens, lots of engine issues seem to be transmission issues. If the engine isn't running well, the transmission won't shift well.

94 wasn't the greatest year for this transmission (obviously through the years they have improved upon it, up to what, 2012 nearly 20 years?), and there are a few common problems that can be fixed with a pan drop and a valve body drop (1-2 and 2-3 accumulator piston and springs, worn pressure regulators and boosters, etc), or it could just be worn out.

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post #3 of 9 (permalink) Old 03-01-2013, 02:14 PM Thread Starter
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Thanks a bunch. Ill try it when i get home.
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post #4 of 9 (permalink) Old 03-01-2013, 02:59 PM
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you need to baby that transmission especially if you don't know the service history of it. It will leave you stranded when you least want it to.
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post #5 of 9 (permalink) Old 03-01-2013, 03:18 PM
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I have to ask... have you checked the level and condition of the transmission fluid? Check for proper level when the vehicle is warmed up, running in park. Also, smell it to see if it smells like fluid or burnt. Also check the color of the fluid, shouldn't be too dark. Let us know.

And as guitar said, drive it nice until you get this resolved, you don't want to make things worse by driving aggressively.

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post #6 of 9 (permalink) Old 03-01-2013, 06:22 PM
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i would definitely try to figure out if the motors running well first. in a perfect world that motor should go and the trans should try to keep up behind it. their are some trans things like shift points and kick-down that are controlled by the engine sensors. but by no means will the motor quit or run funny if the trans is toast unless something goes horribly wrong with the torque convertor and it locks up solid instead of spinning freely. then again, on the old solid aluminum intake, they tend to be laggy all the time, running well or not. definitely MAF cleaning, plugs and wires, vacuum leaks, etc.

cars that hop out of gear, or slam in hard are usually a trans problem, but cars stumbling or falling flat on their face is a sign of something motor related to me. and a lot of those slips are fluid level related, be it low, or even overfull. and everyone hers right, driving a trans while slipping or low on fluid will destroy it, especially driving hard. you'll tear up your clutch-packs and contaminate the fluid with excess clutch material. you' also burn the fluid, which you can smell. its awful smelling, especially if its mercV which smells terrible fresh...

that being said, those 95 and down 4R70W's are horrible, and if your having issues with it sliding into gear or slipping out, its most likely toast. check the fluid... perhaps change it for some mercV and hope for the best is all you can really do. otherwise a 98+ trans with a harness repin will treat you so much better.

of course if your turning while accelerating and it slips out it could very well be your trans pan and filter. the 96+ pan has a deep sump tube and dimple that pickup fluid at a lower level in the pan eliminating the dry sump issues when taking hard turns on the 95 and older setups.

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post #7 of 9 (permalink) Old 03-02-2013, 11:27 AM
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Sounds like a DOA early 4R70w to me... as Nall-One says start shopping for a 98+ QUICK ~!

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Last edited by BUCK; 03-03-2013 at 09:52 AM. Reason: sp
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post #8 of 9 (permalink) Old 03-02-2013, 12:09 PM
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Quote:
Originally Posted by BUCK View Post
Sounds like a DOA early 4R70w to me... as Nail-One says start shopping for a 98+ QUICK ~!
Yup....no sense in prolonging the inevitable---especially the the owner is flat-footing it every chance he gets, lol.
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post #9 of 9 (permalink) Old 03-02-2013, 12:21 PM
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Quote:
Originally Posted by BUCK View Post
Sounds like a DOA early 4R70w to me... as Nail-One says start shopping for a 98+ QUICK ~!
that's two L's thank you NALL

that being said, i agree with myself, buck and GM, at least get yourself a trans repined and lying on the garage floor ready for a quick swap. if you have access to wiring schematics re-pinning any new 4R70W is simple. newer the better.

and always check the 1-2 accumulator springs before swapping it in, just to be safe. last thing you want is to swap it in, fill it with expensive MercV then find it wont shift right in 1-2 because the springs are busted.

and make sure you change the TCC solenoid! otherwise you'll be in the market for a new ECM as well.

oh, and DONT throw away the pan gasket, the newer ones are reusable and MUCH MUCH better then any of the cheepo rubber junk you will get with a filter kit at the parts desk... trust me, save yourself a future leak and keep the old one if it has no visible signs of damage to the rubber. otherwise the dealership will sell you a new one for a decent price.

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