Don Clark wrote:
> I installed a J-type OD and transmission in my 72 TR6. I have had problems
> with it since installation. It leaks about a quart every 200 miles and third
> OD doesn't like to stay engaged. It has done both of these things since I
> installed it about 6 months ago.
>
> The OD stays engaged in 4th gear, but in 3rd it disengages when I let up on
> the gas. It doesn't appear to disengage at any other time. Because it
> disengages only in 3rd and only when I let up on the gas I feel that this is
> NOT an electrical problem. I am wondering if anyone out there has had
> similar problem with a J type or can help me figure out what's wrong the OD.
>
> There is a warranty, and I might end up simply returning the transmission/OD
> for an exchange. However, I don't want to go through the hassle of
> installing a transmission only to have the same problems again. Not to
> mention the expense of returning the thing back to BPNW.
>
> Thanks,
> Don Clark
> Seattle, WA
> '72 TR6
Don,
I wouldn't overlook an electrical problem, however it may be the result of a
mechanical problem inducing the electrical circuit to disengage the OD. Letting
up on the gas causes shifts the driving load on the transmission from the clutch
end (engine pushing car ahead) to the propshaft end (engine braking). Doing so
sometimes causes the hub assemblies inside the transmission to shift slightly
fore/aft. Since the OD is controlled by a switch that contacts the fork that
moves the hub it is possible that the fork is worn (fairly common) such that a
small valley now exists where the switch rides and the switch kicks out quickly
with only slight movement of the fork. Look carefully at the switch (J-OD has
only one that controls the OD and is either on the center top of the cover or in
the center toward the shifter - in either case pointing up) and rig up a test
bulb to indicate if the switch is cutting out under the same conditions while
driving. If so, most switches have a few washers under them - try removing a
washer or two and see if the problem goes away.
As for the leaks, there are a lot of seals/gaskets on the OD trans - clean it up
carefully and see if you can spot where the leak is coming from. Don't forget
to
check the area under the shifter as the rails enter the top cover through an
o-ring seal behind a small cover plate. All the big parts houses seem to carry
the same o-ring that simply doesn't fit properly to seal.
Cheers!
Brian Schlorff
Power British
1242 East Ridge Pike
Plymouth Meeting, PA 19462-2754
610-270-0505
610-270-3059 fax
http://www.powerbritish.com/~britcars
/// triumphs@autox.team.net mailing list
/// To unsubscribe send a plain text message to majordomo@autox.team.net
/// with nothing in it but
///
/// unsubscribe triumphs
///
/// or try http://www.team.net/cgi-bin/majorcool
|