Hi Bob,
Whoops, hit the send button accidentally...
Check the oil level in the gearbox. I found when the oil gets low, it takes
longer for the OD to engage as it uses the gearbox oil in the hydraulics. A
good test is to see if the OD will engage as you are driving down hill (the
oil runs to the front of the gbox and often the od won't engage. Drive up
the same hill and it should engage immediately.
I had the same problem on my 73 TR6 which also has the J type OD (later
model). The problem turned out to be two things.... one was the contacts on
the switch were dirty, the other was the hinge pin I was worn allowing the
switch lever to move for and aft as well as up and down. This is what was
causing the intermittant disengaging when driving over a bump. The switch
lever should have very minimal fore and aft movement (i.e. 2-3 mm at the
end of the lever) and should have a distinct feel as it turns on and off.
I hope this is helpful.
Cheers
Bernard
At 15:48 10/05/00 EDT, RedTriumphTr6@aol.com wrote:
>Anyone know why my overdrive might be not kicking in when the switch on the
>column is tripped? I have the later overdrive on my 74 1/2 and it had a
good
>used switch installed when some sort of problem developed with the original
>switch when the car was being test driven prior to delivery to me in late
98.
> It worked fine until now. Now the overdrive does not engage for a while
>after I trip the switch (usually about a 5 to 10 second delay). Also, I
have
>noticed that the overdrive sometimes (infrequently) disengages abruptly for
>no apparent reason as I am cruising. I only use od in fourth gear, although
>some one told me I could also use it in third gear. jDo you think that my
>switch needs to be replaced, or is the problem more serious and in the
>overdrive unit itself? Maybe my prior vacuum problem affected the od
>engaging? Last weekend I experimented a little and kicked her up to 85-90
on
>the interstate with the od engaged; it was a 90 degree day, the road was
>somewhat bumpy, and after a while the od kicked out. I could not get it to
>engage again until I tried it the next day in cooler weather. Strange.
Any
>thoughts?
> Bob Pierson
>
>
Regards
Bernard Robbins
Installation Department
NEC New Zealand Ltd
P.O. Box 1936
Wellington
Ph (04) 381 6274
fax (04) 381 6284
email brobbins@wlg.nec.co.nz
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