OLDS '93 tranny problem

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doug - 04 May 2007 22:32 GMT

I have a 1993 Delta 88 LSS with the 4T60E transmission. It has developed an
unusual problem that I hope someone can explain.

During the first 10 miles or so of driving, when I have to come to a stop,
the transmission will not downshift to the lowest gear. When I come to a
full stop, it acts as if it is in neutral - stepping on the gas just revs
the engine. If I wait a while, say 15-60 seconds, it will usually drop back
into gear and run normally.

I have discovered that, when this happens, if I move the gear selector to
"1" (low gear), it will usually engage right away.

After I've driven 10 or so miles, the problem pretty much goes away. The car
has 135,000 miles and the tranny has had a fluid and filter change every
three years.

Any ideas anyone? Thanks.

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Mike - 04 May 2007 23:49 GMT

>I have a 1993 Delta 88 LSS with the 4T60E transmission. It has developed an
> unusual problem that I hope someone can explain.
[quoted text clipped - 15 lines]
>
> Any ideas anyone? Thanks.

When was hte last time you checked your tranny fluid ? The symtoms you
describe could be caused by a low fluid level.

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doug - 04 May 2007 23:59 GMT

>>I have a 1993 Delta 88 LSS with the 4T60E transmission. It has developed
>>an
[quoted text clipped - 20 lines]
> When was hte last time you checked your tranny fluid ? The symtoms you
> describe could be caused by a low fluid level.

The fluid level - as well as color and odor - are fine. Last change was 2
years ago.

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Kevin - 05 May 2007 20:40 GMT

Suspect low roller clutch. Selecting manual low engages 2-1 manual band to
provide engine braking, and puts little or no stress on roller clutch.
Overhaul.

>>>I have a 1993 Delta 88 LSS with the 4T60E transmission. It has developed
>>>an
[quoted text clipped - 25 lines]
> The fluid level - as well as color and odor - are fine. Last change was 2
> years ago.

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Rev. Tom Wenndt - 06 May 2007 16:12 GMT

The last time I had a problem like that, I had two problems, both of which
were on the "outside" of the transmission.

One was a bad modulator. Since that is an easy "change out," I would try
that first. Then I had a synchronizer gear that had been ground down by a
burr. That was also able to be removed from the outside of the transmission
and replaced.

Hope this helps.

>I have a 1993 Delta 88 LSS with the 4T60E transmission. It has developed an
> unusual problem that I hope someone can explain.
[quoted text clipped - 15 lines]
>
> Any ideas anyone? Thanks.

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