Home » Public Forums » GMCnet » [GMCnet] Transmission variable pitch question
| [GMCnet] Transmission variable pitch question [message #99031] |
Wed, 08 September 2010 19:12  |
Gary Casey
Messages: 448
Registered: September 2009
Karma: 0
|
Senior Member |
|
|
I should remember this, having worked at Hydramatic way back then, but I guess
there is just too much stuff up in the brain and something had to fall out...:-)
Anyway, the PO installed a variable pitch stator in the torque converter and
had a manual switch to run it. I'd like to make it automatic, but I can't for
the life of me remember how the stators were controlled. I vaguely recall an
idle switch. Was it in the "high pitch" position at full throttle and idle? I
can't remember.
Gary Casey
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] Transmission variable pitch question [message #99033 is a reply to message #99031] |
Wed, 08 September 2010 19:33  |
John Sharpe
Messages: 489
Registered: February 2006
Location: Texas
Karma: 1
|
Senior Member |
|
|
| Quote: |
....I can't for
the life of me remember how the stators were controlled. I vaguely recall an
idle switch. Was it in the "high pitch" position at full throttle and idle? I
can't remember.
Gary Casey
|
No power applied to the solenoid is normal drive or 'high'. Power applied to the solenoid changes to 'power mode' with more torque and more heat generated.
The switch was for WOT and calls for the power mode. You don't need the power mode for idle. Could be interesting to have it hooked up to a vacuum switch so that load would be a determining factor.
John Sharpe
Humble,TX
'78 Eleganza TBI
'89 Spectrum 2000 MPI V-10
'40 Ford Panel Delivery TPI
johnasharpe@gmail.com
|
|
|
|
|
|
| Re: [GMCnet] Transmission variable pitch question [message #99044 is a reply to message #99031] |
Wed, 08 September 2010 20:51 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
|
Senior Member |
|
|
| Gary Casey wrote on Wed, 08 September 2010 18:12 |
I should remember this, having worked at Hydramatic way back then, but I guess
there is just too much stuff up in the brain and something had to fall out...
Anyway, the PO installed a variable pitch stator in the torque converter and
had a manual switch to run it. I'd like to make it automatic, but I can't for
the life of me remember how the stators were controlled. I vaguely recall an
idle switch. Was it in the "high pitch" position at full throttle and idle? I
can't remember.
Gary Casey
Depending on what you call high pitch, it was at
low multiplication at idle to reduce creep and keep temps down, high multiplication under throttle and then back to low multiplication at cruise. I can't recall how they controlled it but it had to be a low tech way at that time
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
Bob de Kruyff
78 Eleganza
Chandler, AZ
|
|
|
|
| Re: [GMCnet] Transmission variable pitch question [message #99058 is a reply to message #99031] |
Wed, 08 September 2010 22:29 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
|
Senior Member |
|
|
| Gary Casey wrote on Wed, 08 September 2010 18:12 |
I should remember this, having worked at Hydramatic way back then, but I guess
there is just too much stuff up in the brain and something had to fall out...
Anyway, the PO installed a variable pitch stator in the torque converter and
had a manual switch to run it. I'd like to make it automatic, but I can't for
the life of me remember how the stators were controlled. I vaguely recall an
idle switch. Was it in the "high pitch" position at full throttle and idle? I
can't remember.
Gary Casey
Gary--here's some more info, although not everything on this site is totally correct but after reading several reports on the same subject you can sift out the facts:
http://www.442.com/oldsfaq/oftsp.htm#SP TransDetail
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
Bob de Kruyff
78 Eleganza
Chandler, AZ
|
|
|
|
| Re: [GMCnet] Transmission variable pitch question [message #99069 is a reply to message #99058] |
Thu, 09 September 2010 01:51 |
Chuck Garton
Messages: 54
Registered: June 2006
Karma: 0
|
Member |
|
|
I have a SP trans and uses a "box" that goes to high slip when the
brakes are applied, and when engine vacuum drops below 4". A built in
timer holds for 20 seconds in both cases. I use a single pole, double
throw center off switch to control, labeled Auto, off and on. Auto
employs the "box", off is tight lockup and on is loose lockup.
Chuck Garton
77 Kingsley 455
Ridgecrest, CA
On Wed, Sep 8, 2010 at 8:29 PM, Bob de Kruyff <NEXT2POOL@aol.com> wrote:
>
>
> Gary Casey wrote on Wed, 08 September 2010 18:12
>> I should remember this, having worked at Hydramatic way back then, but I guess
>> there is just too much stuff up in the brain and something had to fall out...:)
>> Anyway, the PO installed a variable pitch stator in the torque converter and
>> had a manual switch to run it. I'd like to make it automatic, but I can't for
>> the life of me remember how the stators were controlled. I vaguely recall an
>> idle switch. Was it in the "high pitch" position at full throttle and idle? I
>> can't remember.
>>
>> Gary Casey
>>
>>
>> Gary--here's some more info, although not everything on this site is totally correct but after reading several reports on the same subject you can sift out the facts:
>>
>> http://www.442.com/oldsfaq/oftsp.htm#SP TransDetail
>> _______________________________________________
>> GMCnet mailing list
>> List Information and Subscription Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
>
> --
> Bob de Kruyff
> 78 Eleganza
> Chandler, AZ
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] Transmission variable pitch question [message #99074 is a reply to message #99069] |
Thu, 09 September 2010 05:44 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
|
Senior Member |
|
|
On Sep 9, 2010, at 2:51 AM, Chuck Garton wrote:
> I have a SP trans and uses a "box" that goes to high slip when the
> brakes are applied, and when engine vacuum drops below 4". A built in
> timer holds for 20 seconds in both cases. I use a single pole, double
> throw center off switch to control, labeled Auto, off and on. Auto
> employs the "box", off is tight lockup and on is loose lockup.
>
> Chuck Garton
> 77 Kingsley 455
> Ridgecrest, CA
>
> On Wed, Sep 8, 2010 at 8:29 PM, Bob de Kruyff <NEXT2POOL@aol.com> wrote:
>>
>>
>> Gary Casey wrote on Wed, 08 September 2010 18:12
>>> I should remember this, having worked at Hydramatic way back then, but I guess
>>> there is just too much stuff up in the brain and something had to fall out...:)
>>> Anyway, the PO installed a variable pitch stator in the torque converter and
>>> had a manual switch to run it. I'd like to make it automatic, but I can't for
>>> the life of me remember how the stators were controlled. I vaguely recall an
>>> idle switch. Was it in the "high pitch" position at full throttle and idle? I
>>> can't remember.
>>>
>>> Gary Casey
That "box" is made by Bruce Roe. He can be reached at bcroe@juno.com
It come with a switch that has a center off position. When pushed one way it is in automatic mode. When pushed the other way it is always on.
The auto position will, as Chuck says, turn off the switch pitch after about 20 seconds to prevent overheating. I watch my transmission temperature gauge and when I am on a long grade I will sometimes put it into the on position so that the switch pitch stays engaged. When I see the temperature creep up I will then put it back into the auto position.
Emery Stora
77 Kingsley
Santa Fe, NM
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] Transmission variable pitch question [message #99075 is a reply to message #99031] |
Thu, 09 September 2010 06:37 |
Steven Ferguson
Messages: 3447
Registered: May 2006
Karma: 0
|
Senior Member |
|
|
Back when we used to drag race with SP Trannies, we used to have the
switch connected to brake lights, some used the defunct horn button.
Just like dropping the clutch when the light turned green. A simple
diode installation would support an override if you wanted extra power
for passing or hills.
On Wed, Sep 8, 2010 at 5:12 PM, Gary Casey <casey.gary@yahoo.com> wrote:
> I should remember this, having worked at Hydramatic way back then, but I guess
> there is just too much stuff up in the brain and something had to fall out...:-)
> Anyway, the PO installed a variable pitch stator in the torque converter and
> had a manual switch to run it. I'd like to make it automatic, but I can't for
> the life of me remember how the stators were controlled. I vaguely recall an
> idle switch. Was it in the "high pitch" position at full throttle and idle? I
> can't remember.
>
> Gary Casey
>
>
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
|
|
| Re: [GMCnet] Transmission variable pitch question [message #99213 is a reply to message #99212] |
Fri, 10 September 2010 07:43 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
|
Senior Member |
|
|
| Robert Mueller wrote on Fri, 10 September 2010 08:31 |
G'day,
I have a switch pitch in Australia for The Blue Streak and one at Manny's
for Double Trouble.
Is it possible to install a heavy duty trans oil cooler with a fan that
comes on at say 180 degrees to keep the oil temp in the 180-200 degree range
if you wanted to run trans in the "power mode" for a long period of time?
Regards,
Rob M.
USAussie
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
Good morning Mate: Joe Mondello has an external trans cooler with a fan that can be switched on manually. I`m sure a thermostat could be added to work at a set temp. As for it helping the transmission running in power mode for extended periods????? Sorry to hear about the shipping ding, dang truck drivers.....
C. Boyd
76 Crestmont
East Tennessee
|
|
|
|
| Re: [GMCnet] Transmission variable pitch question [message #99228 is a reply to message #99213] |
Fri, 10 September 2010 09:44 |
John Sharpe
Messages: 489
Registered: February 2006
Location: Texas
Karma: 1
|
Senior Member |
|
|
Take a 455 + 370 final drive + switch pitch. You better know how to change push rods! I know of a GMCer who had this combination. He got to where he could listen to the ticking and know which cylinder and valve had the bent push rod.
John Sharpe
Humble,TX
'78 Eleganza TBI
'89 Spectrum 2000 MPI V-10
'40 Ford Panel Delivery TPI
johnasharpe@gmail.com
|
|
|
|
| Re: [GMCnet] Transmission variable pitch question [message #99320 is a reply to message #99212] |
Fri, 10 September 2010 20:58 |
Kosier
Messages: 834
Registered: February 2008
Karma: 1
|
Senior Member |
|
|
----- Original Message -----
From: "Rob Mueller" <robmueller@iinet.net.au>
To: <gmclist@temp.gmcnet.org>
Sent: Friday, September 10, 2010 8:31 AM
Subject: Re: [GMCnet] Transmission variable pitch question
> G'day,
>
> I have a switch pitch in Australia for The Blue Streak and one
> at Manny's
> for Double Trouble.
>
> Is it possible to install a heavy duty trans oil cooler with a
> fan that
> comes on at say 180 degrees to keep the oil temp in the 180-200
> degree range
> if you wanted to run trans in the "power mode" for a long
> period of time?
>
> Regards,
> Rob M.
> USAussie
Rob,
When I installed the 500 Cad, I also installed a switch-pitch,
cause I wanted to
keep the 3.07. Being cautious, I also installed one of Gene
Dotson's aluminum
radiators. Anyway, coming home from Montgomery last spring we
stopped for
the night at a wal-mart just west of Little Rock, Ark. When
leaving in the morn,
I hit the switch for hi-stall leaving the parking lot. It never
went back to lo-stall.
We drove home(30 miles East of Columbus, Ohio) at 60 MPH. The
temperature
gauge never moved above it's normal mark. Made me a believer in
that radiator.
Now that was mostly pretty flat ground, but after hooking up the
tranny temp
gauge, (yeah, procrastinator) I find it cruises at about 115
degrees. Sweet!
Gary Kosier
77EII & 77PB
Newark, Ohio
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
|
|
|
|
|
|
|
|
| Re: [GMCnet] Transmission variable pitch question [message #99342 is a reply to message #99320] |
Sat, 11 September 2010 08:20 |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
|
Senior Member |
|
|
Gary,
I'm confused! How can the trans run at 115 degrees when the water in the in
the radiator is 180 - 190 depending on the thermostat.
Regards,
Rob M.
USAussie
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Kosier
Rob,
When I installed the 500 Cad, I also installed a switch-pitch,
cause I wanted to
keep the 3.07. Being cautious, I also installed one of Gene
Dotson's aluminum
radiators. Anyway, coming home from Montgomery last spring we
stopped for
the night at a wal-mart just west of Little Rock, Ark. When
leaving in the morn,
I hit the switch for hi-stall leaving the parking lot. It never
went back to lo-stall.
We drove home(30 miles East of Columbus, Ohio) at 60 MPH. The
temperature
gauge never moved above it's normal mark. Made me a believer in
that radiator.
Now that was mostly pretty flat ground, but after hooking up the
tranny temp
gauge, (yeah, procrastinator) I find it cruises at about 115
degrees. Sweet!
Gary Kosier
77EII & 77PB
Newark, Ohio
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
|
|
|
|
|
|
|
|
|
|
Goto Forum:
Current Time: Mon Sep 23 23:30:07 CDT 2024
Total time taken to generate the page: 0.05484 seconds
|
GMCforum
Search
Help
Register
Login
Home
