Delayed 1-2 shift; even after the accumulator piston TSB repair

D

Double 97

Registered
Greetings fellow Mark 8trs!

Hoping for some help here!

I had a delayed 1-2 upshift on my 97 (well, one of my 97's anyway). Like a good Mark owner, I did the TSB mod for that symptom and it did not improve the situation. I pulled the valve body apart and everything looked good - all springs, check balls etc. I am now waiting on new gaskets to put the valve body back together and I doubt that the valve body was the problem. Any ideas?
 
RE: Delayed 1-2 shift; even after the accumulator piston TSB repair

The stock shifts are really sloppy even with the updated 1-2 accumlator piston. You need to a get a chip with increased line pressure and/or a J-mod/shift kit.
 
RE: Delayed 1-2 shift; even after the accumulator piston TSB repair

Thanks for the info...

But I'm talking about half-throttle-bouncing-off-the-rev-limiter-shifts here, not a minor shift quality issue!
 
RE: Delayed 1-2 shift; even after the accumulator piston TSB repair

Baumann Shift Kit - period.
 
RE: Delayed 1-2 shift; even after the accumulator piston TSB repair

I think if it's that bad, it might be new transmission time.

(period) }(
 
RE: Delayed 1-2 shift; even after the accumulator piston TSB repair

[div class="dcquote"][strong]Quote[/strong]
Thanks for the info...But I'm talking about half-throttle-bouncing-off-the-rev-limiter-shifts here, not a minor shift quality issue!
[/div]

Somehow I mis-read that. I'm now with sleeper, as it doesn't sound like 'typical' 1-2 shift issue. It sounds more like a low pressure symptom. That in turn leads very quickly to burnt clutches, etc... it may indeed be too late to repair - short of a full rebuild?
 
RE: Delayed 1-2 shift; even after the accumulator piston TSB repair

I appreciate the input on the possible low-pressure condition, but I don't see other symptoms of that; when the trans is in any particular gear it does not slip and there was no unusual material in the pan. The fluid did not have that tell-tale burnt flavor (but went very well with filet mignon).

It just has this 1-2 shift issue. I realize it could still be low pressure, but I'm not seeing signs of that just yet.

I'm going to pull the 1-2 accumulator piston back out (pan is still off waiting for valve body gaskets) and look things over again. Maybe there was some catastrophic case scuffing (which would be a great name for a band) that I overlooked when I replaced the piston.

Has anybody here seen a case where the case is too scuffed up to have the accumulator piston mod fix the problem? I'm asking this just in case.
 
RE: Delayed 1-2 shift; even after the accumulator piston TSB repair

I've heard several report scuffed bores that were cleaned and worked just fine. No burnt fluid and no slipping? That sounds encouraging. Exactly how and when did this problem present itself?
 
RE: Delayed 1-2 shift; even after the accumulator piston TSB repair

Over the past three years, there have been five or six times where the transmission just seemed to 'miss' second gear (thank god for rev limiters!).

Over the past week or two, the transmission started to execute the 1-2 shift at a higher RPM. I was able to force it to upshift by backing out of the throttle at 4,000 RPM. Once in second gear (or any gear) it worked fine; it didn't slip.

I was aware of the TSB for the accumulator piston and finally decided to get around to doing it. I was surprised when the problem was not fixed by the TSB. The car has 70,000 miles on it right now.

I am in the process of getting divorced (however, my marriage to my Lincolns will never end!) and am hoping to avoid an expensive repair! Of course, hoping doesn't really help!
 
RE: Delayed 1-2 shift; even after the accumulator piston TSB repair

I would definitely do two things and consider a third.

1. Check for low pressure. You can have most any tranny shop perform this.
2. Check for any codes.

I would also consider replacing the EPC solenoid and/or shift solenoids, but without a smoking gun this is simply throwing parts at the problem. There are also valve body replacements you could attempt.

I would definitely NOT continue driving(except for diagnosis) until the problem is resolved. IF it is a low pressure situation for whatever reason, continued use will destroy the transmission.
 
RE: Delayed 1-2 shift; even after the accumulator piston TSB repair

How many miles on the tranny?

click the link below, and read the 3rd symptom down. :(

http://www.tccoa.com/articles/tranny/transmission/page4.shtml


To learn how/what is supposed to be happening inside that sluch box we call a tranny, read this:
http://www.tccoa.com/articles/tranny/transmission/page3.shtml

what happens when/if you manually shift? Say, for example you place the shifter in 1st gear instead of drive, then shift at 2500 rpms, part throttle...does it shift as commanded?


if so, I'd start with a new MLPS...but to be honest, if your tranny was well maintained, and the fluid looked good, and the miles are below 130k, I'd just do the JMOD right now...hell, the pan is off, fluid's out, main control is off, and the separator plate is off....get to drilling!
 
RE: Delayed 1-2 shift; even after the accumulator piston TSB repair

Thanks, BlackIce.

That third symptom is interesting. I reassembled the vavle body and rechecked the 1-2 accumulator piston. I was pleasantly surprised to find that I did not cause any additional problems when I reassembled the valve body!

However, I still have the 1-2 shift concern. Must plan my next move!
 
RE: Delayed 1-2 shift; even after the accumulator piston TSB repair

[div class="dcquote"][strong]Quote[/strong]
... However, I still have the 1-2 shift concern. Must plan my next move!
[/div]

"what happens when/if you manually shift? Say, for example you place the shifter in 1st gear instead of drive, then shift at 2500 rpms, part throttle...does it shift as commanded?"
 
RE: Delayed 1-2 shift; even after the accumulator piston TSB repair

Sorry - forgot to answer that when asked earlier.

It does not follow my commands when I manually shift. It upshifts when it is damn good and ready.
 
RE: Delayed 1-2 shift; even after the accumulator piston TSB repair

It doesn't sound good. :(
 
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