Tigers List Archive

This read-only message was archived from a public mail list.
Mail From: James Barrett <(email redacted)>

At 05:24 PM 3/18/99 EST, you wrote:
>Jim,
>Based on the following you have a cast iron SROD transmission. Here is a
>list of transmission ratios from the Fordnatics List:
>From Fordnatics October 1997
>Ford Transmission Ratios...
> SROD ...
> cast
>
>1st 3.29
>2nd 1.84
>3rd 1.00
>4th 0.81
....
>It should be a good setup for the right motor.
>
>Tom Calvert
Tom and John,
I think you hit the nail on the head. When I recomputed the
ratios based on a .81 overdrive and my "speedometer readings", the ratios
came out close to the Tom's supplied numbers. So it is probably
a Single Rail Overdrive (SROD) for a 77-78 Granada.
a 3.29 low gear sounds a lot better than my assumed 4.1 or so.
Now to get my speedometer adjusted for the overdrive and fabricate
a new 3-4 shift rod and flip the 3-4 lever on the side of the
transmission. The reverse lever has a piece hanging down
that I connected the backup light switch to. Will have to avoid
that mess with a bend or two in the shift rod.

James Barrett Tiger II 351C and others

This read-only message was archived from a public mail list.
Mail From: Theo Smit <(email redacted)>

You shouldn't have to get the speedo adjusted, provided you use the same gears
on the trans output shaft and on the speedo takeoff, as what you had previously.
The output shaft still spins at the same speed for a given road speed, no matter
what you have in there for a transmission.

Theo Smit
(email redacted)
B382002705

> -----Original Message-----
> From: James Barrett [SMTPemail redacted)]
> Sent: Thursday, March 18, 1999 4:35 PM
> To: Tom Calvert
> Cc: John Crawley
> Subject: Re: Transmission ID
>
> At 05:24 PM 3/18/99 EST, you wrote:
> >Jim,
> >Based on the following you have a cast iron SROD transmission. Here is a
> >list of transmission ratios from the Fordnatics List:
> >From Fordnatics October 1997
> >Ford Transmission Ratios...
> > SROD ...
> > cast
> >
> >1st 3.29
> >2nd 1.84
> >3rd 1.00
> >4th 0.81
> ....
> >It should be a good setup for the right motor.
> >
> >Tom Calvert
> Tom and John,
> I think you hit the nail on the head. When I recomputed the
> ratios based on a .81 overdrive and my "speedometer readings", the ratios
> came out close to the Tom's supplied numbers. So it is probably
> a Single Rail Overdrive (SROD) for a 77-78 Granada.
> a 3.29 low gear sounds a lot better than my assumed 4.1 or so.
> Now to get my speedometer adjusted for the overdrive and fabricate
> a new 3-4 shift rod and flip the 3-4 lever on the side of the
> transmission. The reverse lever has a piece hanging down
> that I connected the backup light switch to. Will have to avoid
> that mess with a bend or two in the shift rod.
>
> James Barrett Tiger II 351C and others
>

This read-only message was archived from a public mail list.
Mail From: Steve Laifman <(email redacted)>

Jim,

You need correction for the 0.81 final only because they
may have a peculiar transmission speedo drive gear or cable
gear, presuming you are running stock tires (HA!), and a
stock rear end (double HA for Jim). Otherwise, it's measure
of 52.8 feet and count the cable turns pushing the car
between the marks. Disconnect cable from speedo and put a
piece of tape on the core end. The recommended Nissonger or
Momo will correct from this information alone. Don't need
to know your ratios. Shouldn't matter what your final is on
your transmission, year end, or tires with this method. The
stock calibration is in small print on your speedo face, and
probably reads "980", meaning 980 revolutions/mile. All
American speedos are 1,000 revolutions per mile, and they
adjust the drive gearing to match the standard. The British
make a different speedo for every car!!!

Steve

--
Steve Laifman < One first kiss, >
B9472289 < one first love, and >
< one first win, is all >
< you get in this life. >


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_/
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This read-only message was archived from a public mail list.
Mail From: James Barrett <(email redacted)>

At 04:41 PM 3/18/99 -0700, you wrote:
>You shouldn't have to get the speedo adjusted, provided you use the same gears
>on the trans output shaft and on the speedo takeoff, as what you had
previously.
>The output shaft still spins at the same speed for a given road speed, no
matter
>what you have in there for a transmission.
>
>Theo Smit
>(email redacted)
>B382002705
Theo,
I agree with the second statement, however this transmission
came with a speedometer gear that is completely different from the
original tiger gear. The teeth are reversed and if I recall there
are about 22 teeth, My Tiger II had 17 teeth. The drive comes off the
bottom of the tail shaft while the Tiger came off the top of the tail
shaft. Driving up HY 95 on the way to the TE/AE/All British meet,
I was followed by Rob in his mustang. I was setting on 70 and
he said I was around 75 to 79 most of the time. My wife also
followed me in a Chev. I was setting on 60 ( in a heavy rain)
and she said I was going around 68 mph.
So I do need to calibrate my speedometer.


James Barrett Tiger II 351C and others

This read-only message was archived from a public mail list.
Mail From: Bob Palmer <(email redacted)>

Jim,

I think what Theo is saying is that the speedometer/odometer is a single
unit and, if self-consistent, should be left as is. You could adjust the
speedometer part, but then the odometer would still be wrong. The only way
to do this right is to find a set of drive gears that gives the correct
number of turns per 1/100 of a mile (52.8 feet) as Laifman has described.
If you had noticed what the odometer readings were on your trip, and they
were accurate and only your speed was wrong, then indeed your speedometer
needs recalibrating. But if your odometer also reads about 10% high, then
don't touch it.

Bob

At 10:32 PM 3/19/99 -0500, James Barrett wrote:
>At 04:41 PM 3/18/99 -0700, you wrote:
>>You shouldn't have to get the speedo adjusted, provided you use the same
gears
>>on the trans output shaft and on the speedo takeoff, as what you had
>previously.
>>The output shaft still spins at the same speed for a given road speed, no
>matter
>>what you have in there for a transmission.
>>
>>Theo Smit
>>(email redacted)
>>B382002705
>Theo,
> I agree with the second statement, however this transmission
>came with a speedometer gear that is completely different from the
>original tiger gear. The teeth are reversed and if I recall there
>are about 22 teeth, My Tiger II had 17 teeth. The drive comes off the
>bottom of the tail shaft while the Tiger came off the top of the tail
>shaft. Driving up HY 95 on the way to the TE/AE/All British meet,
>I was followed by Rob in his mustang. I was setting on 70 and
>he said I was around 75 to 79 most of the time. My wife also
>followed me in a Chev. I was setting on 60 ( in a heavy rain)
>and she said I was going around 68 mph.
>So I do need to calibrate my speedometer.
>
>
>James Barrett Tiger II 351C and others
>
>

Robert L. Palmer
Dept. of AMES, Univ. of Calif., San Diego
(email redacted)
(email redacted)

This read-only message was archived from a public mail list.
Mail From: Steve Laifman <(email redacted)>

Jim,

There are TWO sets of speedo gears involved. The one you
are talking about is the cheap, easy to replace, few in
choice, one on the end of the speedo cable. The harder one,
and most likely source of problems, is the helical gear
inside the transmission that mates with and drives the cable
gear.


Steve

--
Steve Laifman < One first kiss, >
B9472289 < one first love, and >
< one first win, is all >
< you get in this life. >


_/_/_/_/_/_/_/
_/ _/_/_/ _/_/_/ _/
_/ _/ _/ _/ _/ _/ _/_/_/_/
_/ _/ _/ _/ _/ _/ _/
_/_/_/_/_/__/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
_/
_/_/_/

This read-only message was archived from a public mail list.
Mail From: James Barrett <(email redacted)>

At 08:21 AM 3/20/99 -0800, you wrote:
>JIm,
>
>I may well have missed something in this thread, or am just plain confused,
>but I had the impression that the need to re-calibrate the speedo/odo was
>somehow tied to your installing the new transmission. Thanks for describing
>your calibration procedure. I need to do this with my speedometer too; it
>reads about 10% fast, but I think my odometer reads about 10% slow. If I
>run through the simple math, assuming your speedo/odo is supposed to have
>an input of 980 revolutions per mile, then at 60 mph you multiply by 60 to
>give revs/hr and divide by 60 to give revs/min, so you need to run the
>drill press at 980 rpm and calibrate the speedo to give 60 mph and so forth
>for the other speeds. Is this correct, and is this the procedure you use to
>accurately calibrate the speedo?
Bob,
I have a 15 speed drill press. To make it work for a
speedometer drive I have to twist one drive belt to run the
spindle backwards. I calibrate the speedometer, based on the
drill press speeds that are available. It may not necessarly be
at 980 rpm. It has been a couple of years since I did this the
last time and of course, I don't have the numbers available.
My Tiger II speedometer is labled 1020 on the face in any case.
By the way, I use and old speedometer cable/housing between
the drill press and the speedometer.

James Barrett Tiger II 351C and others

This read-only message was archived from a public mail list.
Mail From: Theo Smit <(email redacted)>

Jim, Bob,

What I was trying to say (and I guess I didn't do it right) was that if the
final drive and tire size weren't changed, then you could re-use the speedo
drive gears from the old transmission in the new one. Or, if you know what was
in the old transmission, you could install equivalent parts in the new one.

But what do I know? My speedo reads about 50% high, and the odometer about 25%
high. I need to take a trip to the Laifman speedo shop, obviously. His method
will determine without fail whether or not you have the right gears in the
transmission. Whether the speedo does the right thing with that input is another
matter entirely.

Good news! I was able to drive in with the top down this morning.

Theo Smit
(email redacted)
B382002705

> -----Original Message-----
> From: Bob Palmer [SMTPemail redacted)]
> Sent: Friday, March 19, 1999 8:59 PM
> To: James Barrett; Theo Smit
> Cc: (email redacted)
> Subject: RE: Transmission ID
>
> Jim,
>
> I think what Theo is saying is that the speedometer/odometer is a single
[] <snip>
> Bob
>
> At 10:32 PM 3/19/99 -0500, James Barrett wrote:
> >At 04:41 PM 3/18/99 -0700, you wrote:
> >>You shouldn't have to get the speedo adjusted, provided you use the same
> gears
> >>on the trans output shaft and on the speedo takeoff, as what you had
> >previously.
> >>The output shaft still spins at the same speed for a given road speed, no
> >matter
> >>what you have in there for a transmission.
> >>
> >>Theo Smit
> >>(email redacted)
> >>B382002705
> >Theo,
> > I agree with the second statement, however this transmission
> >came with a speedometer gear that is completely different from the
> >original tiger gear. The teeth are reversed and if I recall there
> >are about 22 teeth, My Tiger II had 17 teeth. The drive comes off the
> >bottom of the tail shaft while the Tiger came off the top of the tail
> >shaft. Driving up HY 95 on the way to the TE/AE/All British meet,
> >I was followed by Rob in his mustang. I was setting on 70 and
> >he said I was around 75 to 79 most of the time. My wife also
> >followed me in a Chev. I was setting on 60 ( in a heavy rain)
> >and she said I was going around 68 mph.
> >So I do need to calibrate my speedometer.
> >
> >
> >James Barrett Tiger II 351C and others
> >
> >
>
> Robert L. Palmer
> Dept. of AMES, Univ. of Calif., San Diego
> (email redacted)
> (email redacted)