Terry:
I agree with Robert - If it is hard shifting with the engine
running, it sounds as though your clutch is not fully disengaging rather
than a problem with the transmission.
As for the speedo calibration - The Volvo gear is 21 teeth, and
on my TR6 with a Volvo J-Type resulted in a 15% low reading. The TR6
speedo gear is 20 teeth, and so would be better, but still read low
(around 10%). The reason it still reads low is that there are TWO gears
you must worry about, the internal worm gear, and the speedo pinion
gear, which is the one you replaced. Both the internal worm gear and
the pinion gear are different in a Volvo, so simply slapping on the TR6
pinion gear is not enough.
In my case, I used a stop watch and highway mileage markers. It
turns out that the spitfire pinion gear is within a couple percent of
what I needed to get the speedo correct, as it is 18 tooth. This is
almost exactly a 15% change.
In your case, you can also replace the internal worm gear, or
try my solution. To change the internal worm gear requires that you pull
the tranny and disassemble the overdrive. Trying the spitfire pinion
takes 10 minutes and a 1/2" socket. Your choice.... =:-o
Cheers,
Vance
------------------------------
Cogito Ergo Zoom
(I think, therefore I go fast)
TR6 Web page: http://home.comcast.net/~v.navarrette/
-----Original Message-----
From: Terry Geiger [mailto:tgeiger@shoalsbritishcars.org]
Sent: April 14, 2005 6:40 AM
To: Navarrette, Vance; 6pack@autox.team.net
Subject: Re: Stiff shifting after transmission rebuild - speedometer
calibration with o/d
Vance,
Thanks for your reply. I don't think it's the interlock because if the
engine is off there is no binding when shifting into second. If it was
the
gear interlock I would think it would bind with the engine running and
stopped.
I've only put about 20 miles on the transmission. I did drive the car
another 10 miles or so last night and it does feel like second is
loosening
up so I think I'll find some deserted back roads (not hard to find out
here)
and perform some 1st-2nd-3rd shifts for a few miles and see what
happens.
On the subject of speedometer calibration, I think my speedometer is off
(it
seems slow). I had not expected that. I will use my GPS on the car and
check the speedometer over the weekend. Does anyone know if there were
different speedometers for overdrive and non-overdrive cars? John
Esposito
supplied the speedometer gear and right angle drive for the overdrive
unit
(the Volvo speedometer gear is totally different and must be changed)
and I
was expecting to keep the calibration.
Terry Geiger
Florence, Alabama USA
http://www.shoalsbritishcars.org/
'74 Triumph TR6 (for sunny days)
'59 Triumph TR3A (basket case)
'90 Chevy S10 (parts fetcher)
'84 Mercedes Benz 300D Turbo Diesel (for the wife to drive)
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