After the new trans damper was installed, $$$$$ I have notice the automatic isnt shifting normally. It is extremely sporadic, but normally happens when cold.. wont shift from 1st to 2nd, then when warm it does.. then from 2nd to 3rd... usually first thing in the am after a complete cool down.. but will work fine after warmed up properly.. (5 mins of DRIVE time). I will let it warm up fully, but the auto trans (i guess) hasnt warmed up yet. Is there any way to check Auto trans fluid? i suspect a low level of ATF, but not sure how to check this.
TIA-- Chris

 

update: Trans fluid level is fine, i had to use gasoline to remove the sloppy undercoating from the resevoir.. (hey, the cap is RED!!)

still acting a little funny when cold, but it is getting cooler at night here.. maybe a thorough 5 min warmup is necessary??

anyone with an automatic (next a 968 cab w/manual)
care to comment??

I did notice an amount of fluid on the bottom of the trans, too dirty to figure out what color the fluid is.. will steam clean and watch tho...

 

thru research and patience... the auto trans coolant tubes were leaking- but so was the PS..anyway.. I just got the pors-che P/N's for these items.. it there a like set near the trans as well?? might as well replace em all...

the pressure line is 944-307-010-02 76.98, the return line is 944-307-011-01 68.33 plus shipping, they are about a week away. <img src="graemlins/c.gif" border="0" alt="[ouch]" />

 

Chris, lemme start by saying that what I know about Porsche-specific automatics can be writ very large on the head of a small zit, with much space left over.

But some general thoughts from ~35 yrs. of tinkering with automobiles...

A) When was the AT fluid last _changed_? Your symptoms appearing with cold weather lead me to suspect that you may have some old fluid (maybe original?) in there... It tends to thicken with age, as heat cycling drives off the more volatile (thinner) components. The same effect causes posts here about this time of year about noisy morning power steering.

B) Is there a replaceable filter in the tranny? I dunno. but check with your parts source. If so, get one, and whatever gasket / seal needed to install it.

If at all possible, do the fluid & filter when you do the new lines. This is generally the first step in DIY troubleshooting of older or high-miles auto trannies, after checking the fluid level. Also worthwhile to smell the fluid when it's hot, to see if there's any burnt odor. This may be a sign of failing clutches, but can also just indicate a 'way past due need for a fluid & filter change.

If there's a drain plug, check to see if it's magnetic, and observe what's accumulated on it. Some fine grayish metal sludge is to be expected; metal shavings or small parts are a very bad sign....


Jim, headed out for the staff Christmas party at his favorite night spot... dunno if this means I'm 'family,' or just part of the furniture...

 

thanks jim.. im looking for someone who may have a shop manualso i can trace these all the way back to the trans to look for other weak engineering items.
I noticed funny shifting when days began to get colder.. but developed a leak in the trans coolant lines about the same time. The fluid looks fine, no sludge.. im planning a filter/ gasket/ flush & refill after the new lines go on. I was hoping one of you guys had done this..

cheap parts = lotsa labor <img src="graemlins/roflmao.gif" border="0" alt="[hiha]" />

 

The problem sound like it may be the servo that controls the band. The servo put pressure on the band for 2nd gear.when the seals get hard and brittle it will not shift.Or it will take a long time to shift and when the trans get warm it will work okay. Take it to a shop and have the o-rings and seals replaced and it will probably be fine


P.S. have the filter and screen replaced also

 

Turns out a pesky leak in one of these two lines.. Ill just replace both. Could the lack of pressure be responsible?? I epoxied the lines to seal the leaks-- (Temp fix- daily driver)and shifting absolutely perfect right now.
also anyone know if similar lines (rubber) exist near the trans itself? (And the part numbers if possible..)while I'm in the process of replacing these, i wanted to check to see if anyone w/ auto trans experience has done the same fix..

The pressure line is 944-307-010-02
The return line is 944-307-011-01
Thanks in Advance..

 

Thanks all! BACK to the top.. My appreciation is truly genuine.. I just bit for the membership. Cheap insurance.