Transmission mis-shift and shudder in 3rd - TCCoA Forums
 
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post #1 of 25 (permalink) Old 08-20-2006, 08:43 PM Thread Starter
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Transmission mis-shift and shudder in 3rd

Ok so I bought my 97 last year, i bought it from a dealer in Chicago as is, went down and picked it up, noticed it shifted a little weird just from 2nd to 3rd, i changed the fluid right away when i got home, i just use regular Mercon and the shudder going into 3rd was still there, but it only does it when i'm not really on the gas, if I hold it to the floor it seems to shift just fine, but sometimes when the tranny isn't warmed up it hesitates shifting into 3rd and every once in awhile i revs up like its caught between gears but eventually it shifts.


its done this for a year now i obviously i wouldn't say it is slipping because i think it would have mechanically failed by now.

i understand this is an Electronically controlled transmission with solenoids and accumulators, what kind of components would fail to cause this?
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post #2 of 25 (permalink) Old 08-20-2006, 09:31 PM Thread Starter
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so after doing some reading i'm planning on swapping out the Mercon for Mercon V.


does anyone have any favored brands of Mercon V?
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post #3 of 25 (permalink) Old 08-21-2006, 01:24 PM Thread Starter
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No one has any thoughts?
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post #4 of 25 (permalink) Old 08-21-2006, 02:15 PM
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Motorcraft.

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These are highly engineered precision vehicles, the first step in diagnosing the problem is to strike the suspected offending part sharply and repeatedly with a blunt object, then re-test.
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post #5 of 25 (permalink) Old 08-22-2006, 11:08 PM Thread Starter
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would it be a problem if i didn't go with Motorcraft?
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post #6 of 25 (permalink) Old 08-22-2006, 11:29 PM
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would it be a problem if i didn't go with Motorcraft?
No. They are just a proven good brand.

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post #7 of 25 (permalink) Old 08-24-2006, 09:38 PM Thread Starter
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what other brands would be a good suggestion?
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post #8 of 25 (permalink) Old 08-24-2006, 09:44 PM
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I believe Castrol and Valvoline should also be good. But you can't beat the comfort of OEM.

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post #9 of 25 (permalink) Old 08-24-2006, 10:33 PM Thread Starter
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how much is Motorcraft Mercon V?
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post #10 of 25 (permalink) Old 08-24-2006, 11:39 PM
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about $3.98 a quart

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post #11 of 25 (permalink) Old 08-26-2006, 08:41 PM Thread Starter
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not bad considering Valvoline costs the same


ok now tonite i had it floored and it hit the rev limiter in 2nd for a few seconds before shifting into 3rd.....any ideas?
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post #12 of 25 (permalink) Old 08-27-2006, 12:05 PM
 
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ok now tonite i had it floored and it hit the rev limiter in 2nd for a few seconds before shifting into 3rd.....any ideas?
My 95 would hang up on the 1-2 shift and then a couple thousand later the 2-3 shift... Replaced the 1-2 and 2-3 accumulator pistons and springs, did the J-mod and it never hung up again. Just my experience with that problem.
post #13 of 25 (permalink) Old 03-24-2007, 11:28 AM Thread Starter
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so i'm planning to get this car back on the road after pulling it out of storage and i still haven't resolved this issue.


i plan on changing the accumulator pistons/springs and possibly doing the j-mod and also changing the fluid to Mercon V

would this most likely solve the problems?
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post #14 of 25 (permalink) Old 03-24-2007, 12:40 PM
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You have to start some place and that sounds like a great place to start.

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post #15 of 25 (permalink) Old 05-04-2007, 02:53 PM Thread Starter
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where is the best place to get the accumulator pistons and springs?


any particular brand i should be looking at?
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post #16 of 25 (permalink) Old 05-04-2007, 02:56 PM
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post #17 of 25 (permalink) Old 05-04-2007, 10:03 PM
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Don't go with anything other than OEM for internal tranny parts.

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post #18 of 25 (permalink) Old 05-05-2007, 03:23 AM Thread Starter
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thanks guys
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post #19 of 25 (permalink) Old 06-09-2007, 02:54 PM
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Quote:
Originally Posted by Black_Thunder View Post
Ok so I bought my 97 last year, i bought it from a dealer in Chicago as is, went down and picked it up, noticed it shifted a little weird just from 2nd to 3rd, i changed the fluid right away when i got home, i just use regular Mercon and the shudder going into 3rd was still there, but it only does it when i'm not really on the gas, if I hold it to the floor it seems to shift just fine, but sometimes when the tranny isn't warmed up it hesitates shifting into 3rd and every once in awhile i revs up like its caught between gears but eventually it shifts.
Wow you described the problem I was having to a tee. Now I've got that "rumble strips" feeling and it's in the shop. Hopefully it's salvageable but it feels like the transmission is going to fall out of the car when it shifts.

So, moral of the story, it's not going to get any better, so you might as well get it fixed as soon as you can.

Let us know what you find and I'll let you know what I find.

John
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post #20 of 25 (permalink) Old 06-09-2007, 02:55 PM
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i plan on changing the accumulator pistons/springs and possibly doing the j-mod and also changing the fluid to Mercon V

would this most likely solve the problems?
Oh and don't forget the PCM update in TSB 98-8-7, step 9: http://www.mn12performance.com/mn12-...tsb/TW0807.pdf
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post #21 of 25 (permalink) Old 06-13-2007, 07:46 PM
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Wow you described the problem I was having to a tee. Now I've got that "rumble strips" feeling and it's in the shop. Hopefully it's salvageable but it feels like the transmission is going to fall out of the car when it shifts.

So, moral of the story, it's not going to get any better, so you might as well get it fixed as soon as you can.

Let us know what you find and I'll let you know what I find.
Well in my case they found the 2-3 accumulator and spring were damaged and also the gasket. They replaced all of those things and the tech claimed to have done a road test and the transmission was okay.

I literally pulled out of the dealership parking lot and on the first 2-3 shift it's no different. Still feel likes the car is rumbling to death through third gear.
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post #22 of 25 (permalink) Old 06-19-2007, 05:44 PM
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I'm not sure if Black_Thunder ever fixed his problem or not, but I put a tube of that Dr. Tranny's Instant Shudder Fixx in last week and I haven't had a problem since.

The tech said he didn't find any particles in the pan when he changed the fluid, so who knows... maybe this will help it last another 10,000 miles (which is a full year's driving for me) and then I can get a new trans.

John
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post #23 of 25 (permalink) Old 04-23-2008, 11:15 PM Thread Starter
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right before i put my car into storage last november on my way home from work it wouldn't shift after 2nd gear.

goes into gear just fine, shifts from 1st to 2nd jsut fine and then when it goes to shift into third it just revs up, and if i really put it to the floor it'll engage and then kick out again.

i don't think its slipping because the fluid is red and i don't smell anything burning.

i guess i'm gonna drop the pan and the take the valvebody and just see if anything obvious is wrong.

any ideas for a fix? or is my tranny piretty much screwed?
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post #24 of 25 (permalink) Old 04-24-2008, 07:35 AM
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I was at first thinking one thing when you said it was neutraling going into 3rd, but then you said it would catch when you floored it. That tells me that you have likely fried the direct clutch. If it never did anything in 3rd then it would more likely be the stub shaft.

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post #25 of 25 (permalink) Old 04-24-2008, 12:37 PM Thread Starter
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damn, might be doing a tranny swap
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