For what it's worth, It didn't grind either. Maybe you need a new/rebuilt O/D.
Andy
On 06/03/98 05:17 PM Peter Zaborski said...
>
>> From: Andy [SMTP:adixon@loudoun.com]
>> Sent: Wednesday, June 03, 1998 5:05 PM
>>
>> Can't say much about my present TR6, it's merely a shell (and a rusty
one
>> at that). But my previous one did not appear to drop out of overdrive
>> between 3rd and 4th.
>>
>I am not clear on what you mean by this. During normal shifting, my car
does
>not *appear* to drop out of O/D either. What I mean is that when I have the
>O/D on and I am in 4th, I can downshift to 3rd and the O/D appears to stay
>on. Likewise for the 3rd to 4th shift. I say appears because although there
>is no discernible jerk as the O/D dis-engages and re-engages when the
>gearbox is put in gear, I know that the solenoid loses its power for the
>brief time the gear shift lever is in between gears. The shift does appear
>to be smooth however. If I didn't have the O/D indicator in my car, I would
>not know that the solenoid was briefly losing power.
>
>I pressure tested my O/D recently during just such a shift sequence and
the
>normal pressure of my O/D is 470psi when engaged. During the shift the
>pressure briefly dropped to 450psi and then shot back up to 470psi. I
guess
>that the drop to 450 is not sufficient to dis-engage the O/D. (When the O/D
>is off the pressure is about 15-20psi).
>
>So two possibilities why your O/D appeared to stay on are: either your
>previous TR6 had a different switching mechanism than mine or you were
>simply not aware that the solenoid was losing power but the O/D remained
>engaged. It could also be something I have not considered. FWIW, my car
is a
>stock 76 with the factory J-type O/D.
>
>I won't be able to do any more testing on mine until the weekend but I am
>really curious if maintaining the power to the solenoid on during the 3-4
>(and 4-3) shift will remove the grind (I only get the grind on the 3-4
>shift, with O/D on).
>
>Peter Zaborski
>76 TR6 (CF58310 UO)
>Calgary AB Canada
|