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Discussion Starter #1
1975 Shadow:

Sometimes, especially in cold weather, my transmission is slow shifting into Drive after the car is first backed out of the driveway after being started in the morning.

My technician and I agreed that this is quite expensive to correct and can be lived with. However, I discovered something interesting.

If instead of shifting into Drive, I shift into Intermediate or Low, the transmission will respond instantly. Then I can simply shift back into Drive, which happens instantly.

Does this new information tell us any more than what we already knew?
 

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It could be that your contacts in the shift lever and/or the gear actuator for "Drive," which is selected far more than anything else, have worn or gotten out of adjustment somehow when you use them "from the normal shifting direction" (i.e., shifting from Park, Reverse, or Neutral into Drive). The intermediate and low settings are very seldom used by most of us, so those contacts are probably about as close to new as possible. When you "come at Drive" from the direction that is atypical that sets up an ever-so-slightly different dynamic as far as the contacts go. That tiny bit may be what's making the difference.
 

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Discussion Starter #3
Thanks, Brian! However, I was told that these behaviors are probably due to wear inside the transmission because if the car is warmed up and shifted from Park into Drive, the transmission responds instantly.
 

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Thanks, Brian! However, I was told that these behaviors are probably due to wear inside the transmission because if the car is warmed up and shifted from Park into Drive, the transmission responds instantly.
Steve,

You are contradicting your first post in that you initially stated that it would behave correctly "instantly" if shifted into intermediate or low and then back into drive. If this is the case it would make little sense to me that this behavior would be from internal transmission wear.

A delay in initial engagement in the manner you described, followed by perfectly normal behavior once engaged, just doesn't strike me as "a transmission problem" in any conventional sense. It is odd, though that the behavior varies based upon whether the car is warm or not (which you'd not mentioned earlier).

The transmissions in these cars are easily evaluated and repaired by any shop competent in servicing GM transmissions that were installed in millions of cars over several decades. If you really suspect transmission problems I'd take the car to a transmission specialist.
 

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Discussion Starter #5
My apologies, Brian; if I mixed up my information. Please allow me to attempt clarification, to wit:

Car is warm - this includes even an initial start in warm weather - car will shift from Park or Reverse into Drive and engage instantly.

Car is cold - car is being shifted from Park or Reverse into Drive - car will hesitate several seconds to actually engage into Drive.

Car is cold - car will shift instantly into Intermediate or Low. If shifted into Drive from I or L, Drive will engage instantly.
 

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I agree with the theory, that this problem is related to an elektrical switch problem.

DRX7012 does allways start on "N" but with "P" selected the starter won´t turn in 9 of 10 cases. I´m used to it meanwhile, but this year the same problem as at catullus Shadow appears. D will often not be selected from the N direction but allways from the S / L direction.


Dear guyslp, what do you think, which switch should be adjusted and cleaned up? the gear selector behind the wheel (or wherever they hid it) or the box on the transmission that looks as it would be impossible to remove the rear part without removing the whole system.
 

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Michael,

The first problem you describe is well-known and documented and involves what most people call the neutral safety switch which makes it impossible to crank the car unless the gear selector is in Park or Neutral. Get yourself over to the RROC-Australia Tee-One Topics Archive and have a look at the article entitled, The Safety Switch On Your Gearchange, in Issue 76. Often the resolution is as easy as applying some TV Tuner Cleaner or Caig DeOxIt to the contacts in the gear selector mechanism if the issue is dirt/corrosion alone. Even if you have to do adjustments, I'd still start here and move "down below" if the problem remains unresolved.
 

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Brian!

thank you for your unbelivable quick answer! do you remeber all 97 T1 topics that fast?

I´ll try to remove the surroundings without damage and clean up the switch.
 

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I don't remember the content of all Tee-One Topics this rapidly. However:
- I do know how to use the existing index
- I'd looked this up in response to Steve's first post, but because his car starts no problem it doesn't apply there.

I only wish I had a "mental index" of all of Tee-One Topics. One of the things to do "when I have the spare time" is to go through all the issues and make a new index. The existing one is helpful, but not nearly as comprehensive as the actual material in the publication. It would also be helpful to have an index to the non-technical content as well. There are times when I'd like to blow my own head off because I'm absolutely certain that I came across something in Tee-One Topics that is not in the existing index and where I simply cannot recall what I was actually looking for at the time I "happened upon" what I actually want right now!!
 

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and it was the perfekt answer, it starts in P if the gear shifter is moved forward... allmost a kind of anti-theft-feature
 
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