It could also be that the cone clutches in the overdrive are slipping.
If the oil pressure in the OD is marginal the viscosity loss might
cause the clutches to slip enough to cause it to drop out of OD, but
not move back far enough to firmly engage normal drive.
Just another idea to complicate your day.
Bill Lawrence
On Jul 13, 2004, at 12:39 PM, Dave & Marlene wrote:
> Hi Ken,
>
> This one is a little hard to diagnose. The symptoms are nearly the
> same for a slipping clutch & a slipping unidirectional clutch in the
> overdrive. The unidirectional clutch is involved in all non OD drive
> functions but not for over run torque. It is not involved when the car
> is in overdrive, but if the main clutch is slipping there may not be
> enough torque in 3rd over to make it slip anyway.
>
> I know it is little comfort, but if it is the unidirectional clutch it
> will get worse & completely fail before the main clutch gets worse.
> Not sure how heat fits into the problem. One solution is to replace
> the clutch & if that doesn't cure the problem, check the OD.
>
> I hope someone has a more accurate assessment of the problem.
>
> Dave Russell
> BN2
>
> Freese, Ken wrote:
>> Yesterday at 100 degrees in traffic, the clutch slipped when going
>> from 3OD
>> to 3 direct. The clutch wasn't used, but I guess there was just
>> enough of a
>> jar that it slipped a bit before gripping up again. Later I could
>> also make
>> it slip in 2nd pulling away in the stop and go traffic. Previously I
>> blamed
>> the hydraulics for my hot weather clutch slips in traffic, but since
>> no
>> hydraulics were involved in going out of OD, I am thinking that the
>> lining
>> is oil soaked. I do have a substantial rear seal leak. No problems on
>> warm
>> days, just the hot ones. Any comments?
>> Ken Freese
>> 65 BJ8
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