Home » Public Forums » GMCnet » [GMCnet] Synthetic ATF
| [GMCnet] Synthetic ATF [message #135174] |
Tue, 19 July 2011 11:30  |
peabody
Messages: 126
Registered: May 2011
Location: steamboat springs, co
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All,
I'm about to change the filter and non-synthetic ATF fluid on my Danny Dunn (that's an issue for another day) transmission with about 2 to 3 K miles on it (I'm planning a long trip). Can I now switch to synthetic ATF ?
Bill
William S. Schurman
P.O. 773325
Steamboat Springs, CO (Ski Town USA)
at the foot of Rabbit Ears Pass
970-846-4212
'78 Palm Beach TZE 168V100258
'90 SHO
'66 912
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| Re: [GMCnet] Synthetic ATF [message #135204 is a reply to message #135174] |
Tue, 19 July 2011 13:50  |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
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Sure can. You will end up with a mix of 50/50 or less since you can not get all of the old stuff out. It will not hurt anything.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Synthetic ATF [message #135207 is a reply to message #135174] |
Tue, 19 July 2011 14:34 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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| peabody wrote on Tue, 19 July 2011 12:30 |
All,
I'm about to change the filter and non-synthetic ATF fluid on my Danny Dunn (that's an issue for another day) transmission with about 2 to 3 K miles on it (I'm planning a long trip). Can I now switch to synthetic ATF ?
Bill
|
Bill,
The Mobil1 ATF says it is compatible with conventional ATF. If you want to do the job right, take out the torque converter cover plate and look for the drain plug in the converter. Also, if the transpan does not have a drain, this would be a good time to put one in.
According to Manny, the trans holds between 11 and 14 quarts.
Only about half comes down all over you when you get the pan loose. Most of the rest is in the converter.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] Synthetic ATF [message #135210 is a reply to message #135207] |
Tue, 19 July 2011 14:40 |
Dennis S
Messages: 3046
Registered: November 2005
Karma: 2
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Matt et al,
Does anyone use a manual transfer pump down the dipstick tube to remove some of the ATF before pulling the pan? (those who do not yet have a drain plug)
Dennis Sexton
73 GMC
Germantown, TN
USA
-----Original Message-----
From: Matt Colie <matt7323tze@gmail.com>
To: gmclist@temp.gmcnet.org
Sent: Tue, Jul 19, 2011 2:34 pm
Subject: Re: [GMCnet] Synthetic ATF
According to Manny, the trans holds between 11 and 14 quarts.
nly about half comes down all over you when you get the pan loose. Most of the
est is in the converter.
Matt
-
att & Mary Colie
73 Glacier 23 Chaumiere (say show-me-air)
E Michigan - Twixt A2 and Detroit
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Dennis S
73 Painted Desert 230
Memphis TN Metro
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| Re: [GMCnet] Synthetic ATF [message #135215 is a reply to message #135212] |
Tue, 19 July 2011 15:02 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
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| mcolie wrote on Tue, 19 July 2011 14:56 |
| Dennis S wrote on Tue, 19 July 2011 15:40 |
Matt et al,
Does anyone use a manual transfer pump down the dipstick tube to remove some of the ATF before pulling the pan? (those who do not yet have a drain plug)
Dennis Sexton
|
Dennis,
Actually there are more than a few. They are sold for boat owners to change engine and transmission lube. Go to a marine supply site and look up "Oil Change Pumps". It may take several mouthfulls unless you get one that is large enough.
This is what I did when I just had to take my trans down, but this was the first trans I had done since I got that vacuum system going. There was still enough in the pan to make a big mess. A drain plug is much better, but hard to put in a full pan.
Matt
|
If your planning on putting a drain plug in, take a center punch and poke a hole in the pan where you plan on putting the plug.
(or drill a small hole using a depth stop, but you get fluid on your drill )
Solves the whole draining issue!
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: [GMCnet] Synthetic ATF [message #135231 is a reply to message #135174] |
Tue, 19 July 2011 16:38 |
Ernest Dankert
Messages: 133
Registered: May 2007
Location: Ogden, New York
Karma: 1
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Pull one of the cooler lines (identify supply and return first) and pump it out idling. Will get most. You can pour fresh in the dipstick and use that to purge the old out of the converter. Or do a bit every year.
I use Amsoil syn ATF in a Dunn transmission. Works ok; just don't overfill or it will run hot.
1977 Eleganza II
Ogden NY
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| Re: [GMCnet] Synthetic ATF [message #135233 is a reply to message #135215] |
Tue, 19 July 2011 16:37 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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But you'd better check a removed pan, or get authoritative advice,
before you punch a hole in a location not suitable for the
installation of a drain plug.
Ken H.
On Tue, Jul 19, 2011 at 4:02 PM, Keith V wrote:
>
> If your planning on putting a drain plug in, take a center punch and poke a hole in the pan where you plan on putting the plug.
> (or drill a small hole using a depth stop, but you get fluid on your drill )
>
> Solves the whole draining issue!
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Synthetic ATF [message #135250 is a reply to message #135215] |
Tue, 19 July 2011 19:17 |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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Garry Rockwell and Ragusa both have very nice transmission oil pans that include drains, room for more ATF, ports for temperature probes, and cooling fins. For about $200 I don't think it would fall too far off my list.
Oh, wait, my Beloved PO already put a Ragusa pan on my transmission. Bless him!
Jim K has them as well as many others, I'm sure... <http://appliedgmc.com/level.itml/icOid/482>
Larry Davick
Fremont, California
The Mystery Machine
'76 (ish) Palm Beach
----- Original Message -----
From: "Keith V" <my427v8@hotmail.com>
To: gmclist@temp.gmcnet.org
Sent: Tuesday, July 19, 2011 1:02:08 PM
Subject: Re: [GMCnet] Synthetic ATF
mcolie wrote on Tue, 19 July 2011 14:56
> Dennis,
>
> Actually there are more than a few. They are sold for boat owners to change engine and transmission lube. Go to a marine supply site and look up "Oil Change Pumps". It may take several mouthfulls unless you get one that is large enough.
>
> This is what I did when I just had to take my trans down, but this was the first trans I had done since I got that vacuum system going. There was still enough in the pan to make a big mess. A drain plug is much better, but hard to put in a full pan.
>
> Matt
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] Synthetic ATF [message #135255 is a reply to message #135233] |
Tue, 19 July 2011 20:07 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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G'day,
I installed a drain and a temp sensor bung in a spare trans pan I had.
Unfortunately I didn't take any pictures of it (DUMMY!). I think it is in
the bottom of the pan near the right rear corner (passenger side). It is a
nut heli-arced on the inside with a slot in it to drain the last bit of
fluid. I can't remember where I put the temp sensor bung.
Regards,
Rob M.
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Ken Henderson
Sent: Wednesday, 20 July 2011 7:37 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Synthetic ATF
But you'd better check a removed pan, or get authoritative advice,
before you punch a hole in a location not suitable for the
installation of a drain plug.
Ken H.
On Tue, Jul 19, 2011 at 4:02 PM, Keith V wrote:
>
> If your planning on putting a drain plug in, take a center punch and poke
a hole in the pan where you plan on putting the plug.
> (or drill a small hole using a depth stop, but you get fluid on your drill
)
>
> Solves the whole draining issue!
>
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Synthetic ATF [message #135257 is a reply to message #135233] |
Tue, 19 July 2011 20:28 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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| Ken Henderson wrote on Tue, 19 July 2011 16:37 |
But you'd better check a removed pan, or get authoritative advice,
before you punch a hole in a location not suitable for the
installation of a drain plug.
Ken H.
On Tue, Jul 19, 2011 at 4:02 PM, Keith V wrote:
>
> If your planning on putting a drain plug in, take a center punch and poke a hole in the pan where you plan on putting the plug.
> (or drill a small hole using a depth stop, but you get fluid on your drill )
>
> Solves the whole draining issue!
>
|
Yea, I'd check the net / photoarchive etc before deciding where to put the plug anyway
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: [GMCnet] Synthetic ATF [message #135302 is a reply to message #135210] |
Wed, 20 July 2011 07:36 |
Steven Ferguson
Messages: 3447
Registered: May 2006
Karma: 0
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The easiest and neatest way to drain the pan is to carefully remove the
bolts holding the rear of the pan on, then start loosening the remaining
bolts allowing the pan to slowly drop down at an angle. Keep loosening the
remaining bolts until the pan is nearly empty. Then remove the last couple
of bolts and you will have a nearly empty pan in your hands. This method
works quite well and if you leave it rest at a severe angle overnight, the
fluid clinging to the valve body etc will eventually drip into the pan, then
into whatever you are using for a drain pan. Never spill a drop this way.
On Tue, Jul 19, 2011 at 12:40 PM, As <dennisfsexton@aol.com> wrote:
>
> Matt et al,
>
> Does anyone use a manual transfer pump down the dipstick tube to remove
> some of the ATF before pulling the pan? (those who do not yet have a drain
> plug)
>
>
> Dennis Sexton
> 73 GMC
> Germantown, TN
> USA
>
>
>
> -----Original Message-----
> From: Matt Colie <matt7323tze@gmail.com>
> To: gmclist@temp.gmcnet.org
> Sent: Tue, Jul 19, 2011 2:34 pm
> Subject: Re: [GMCnet] Synthetic ATF
>
>
>
> According to Manny, the trans holds between 11 and 14 quarts.
> nly about half comes down all over you when you get the pan loose. Most of
> the
> est is in the converter.
> Matt
> -
> att & Mary Colie
> 73 Glacier 23 Chaumiere (say show-me-air)
> E Michigan - Twixt A2 and Detroit
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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--
Steve Ferguson
Sierra Vista, AZ
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| Re: [GMCnet] Synthetic ATF [message #135315 is a reply to message #135304] |
Wed, 20 July 2011 09:29 |
|
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Larry,
I can't find what I wrote but I did find what you wrote!
Regards,
Rob M.
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426
************************************************************************
Rob,
You can take it to a "Jiffy Lube" type place to have them change the fluid,
and to my way of thinking that is the only way to *completely* change all of
the fluid, as long as you have the filter changed also. The only catch is,
the last couple of times I stopped at a "Jiffy Lube" type place, they were
*not* offering synthetic fluids as a change option. So you may have to make
a sort of deal with the owner/manager to use synthetic fluid. That being
said, you can get most of the oil out using the following procedure. Keep
in mind, there are several (perhaps many) that would not do this. (including
IIRC Manny). I've done it many times with no ill results.
Sooooooo.....
This is a very messy procedure; you're gonna spill fluid, so be prepared
with dry rags and the like to clean-up afterwards.
1. Do this with the trans cold. Wait at least over night.
2. Raise the coach high enough to get a 5 gal pail under it with room to
spare.
3. Disconnect both trans lines at the radiator, and be prepared to catch the
fluid coming out of the cooler in the radiator.
4. Attach hose extensions to the lines and drop the lines into the 5 gal
pail.
5. Using two people, start the motor for only couple of seconds. Do this to
identify which line the fluid will come out of. Now you know which line you
*must* keep in the bucket.
6. Again, using two people, (one to run the motor, the other to watch the
fluid) start the motor.
7. Run the motor until the fluid line begins spurting air. Shut motor off
immediately! The fluid will get quite frothy.
8. Allow to stand without the motor running for 4-5 minutes. This will let
excess fluid in the trans drain down into the pan.
9. Start the motor again for no more than 5 seconds. Shut off the motor.
This will pump out that last little bit in the pan and make dropping the pan
a lot less messy.
10. Let the oil lines drip into the pail while you drop the trans pan.
11. Drop the trans pan, and replace the filter using two (2) "O" rings at
the filter.
12. Hook up the two trans lines to the oil cooler at the radiator.
13. Fill the trans with about 7 quarts of trans fluid.
14. Start the motor and allow to idle for about 30 seconds or so before
checking fluid level.
15. Check fluid level and add accordingly.
16. Once full, drive until normal operating temp is reached, and recheck
fluid level. Add fluid to bring to "Full".
I've used this procedure on every auto trans that I've owned for .... well
.... forever.
This is just the way I do it....your mileage may vary.
Just my relatively informed, off the cuff, back yard mechanic, gut level,
eyeball it up and guesstimate, way of doing things....that's all...
--
Larry :)
78 Royale w/500 Caddy
Menomonie, WI.
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Larry
Sent: Wednesday, 20 July 2011 10:53 PM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Synthetic ATF
Will,
Rob Mueller posted a procedure for changing fluid...quoteing something that
I wrote several years ago. I did a search for it but cannot find it.
Rob...you out there? Can you point us to it?
--
Larry :)
78 Royale w/500 Caddy
Menomonie, WI.
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Synthetic ATF [message #135323 is a reply to message #135302] |
Wed, 20 July 2011 10:12 |
Dennis S
Messages: 3046
Registered: November 2005
Karma: 2
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Senior Member |
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Steve,
Great idea -- thanks for sharing.
Dennis
-----Original Message-----
From: Steven Ferguson <botiemad11@gmail.com>
To: gmclist@temp.gmcnet.org
Sent: Wed, Jul 20, 2011 7:36 am
Subject: Re: [GMCnet] Synthetic ATF
The easiest and neatest way to drain the pan is to carefully remove the
olts holding the rear of the pan on, then start loosening the remaining
olts allowing the pan to slowly drop down at an angle. Keep loosening the
emaining bolts until the pan is nearly empty. Then remove the last couple
f bolts and you will have a nearly empty pan in your hands. This method
orks quite well and if you leave it rest at a severe angle overnight, the
luid clinging to the valve body etc will eventually drip into the pan, then
nto whatever you are using for a drain pan. Never spill a drop this way.
On Tue, Jul 19, 2011 at 12:40 PM, As <dennisfsexton@aol.com> wrote:
>
Matt et al,
Does anyone use a manual transfer pump down the dipstick tube to remove
some of the ATF before pulling the pan? (those who do not yet have a drain
plug)
Dennis Sexton
73 GMC
Germantown, TN
USA
-----Original Message-----
From: Matt Colie <matt7323tze@gmail.com>
To: gmclist@temp.gmcnet.org
Sent: Tue, Jul 19, 2011 2:34 pm
Subject: Re: [GMCnet] Synthetic ATF
According to Manny, the trans holds between 11 and 14 quarts.
nly about half comes down all over you when you get the pan loose. Most of
the
est is in the converter.
Matt
-
att & Mary Colie
73 Glacier 23 Chaumiere (say show-me-air)
E Michigan - Twixt A2 and Detroit
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teve Ferguson
ierra Vista, AZ
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MCnet mailing list
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Dennis S
73 Painted Desert 230
Memphis TN Metro
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| Re: [GMCnet] Synthetic ATF [message #135371 is a reply to message #135315] |
Wed, 20 July 2011 17:26 |
fred v
Messages: 999
Registered: April 2006
Location: pensacola, fl.
Karma: 0
|
Senior Member |
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| Robert Mueller wrote on Wed, 20 July 2011 09:29 |
Larry,
I can't find what I wrote but I did find what you wrote!
Regards,
Rob M.
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426
************************************************************************
Rob,
You can take it to a "Jiffy Lube" type place to have them change the fluid,
and to my way of thinking that is the only way to *completely* change all of
the fluid, as long as you have the filter changed also. The only catch is,
the last couple of times I stopped at a "Jiffy Lube" type place, they were
*not* offering synthetic fluids as a change option. So you may have to make
a sort of deal with the owner/manager to use synthetic fluid. That being
said, you can get most of the oil out using the following procedure. Keep
in mind, there are several (perhaps many) that would not do this. (including
IIRC Manny). I've done it many times with no ill results.
Sooooooo.....
This is a very messy procedure; you're gonna spill fluid, so be prepared
with dry rags and the like to clean-up afterwards.
1. Do this with the trans cold. Wait at least over night.
2. Raise the coach high enough to get a 5 gal pail under it with room to
spare.
3. Disconnect both trans lines at the radiator, and be prepared to catch the
fluid coming out of the cooler in the radiator.
4. Attach hose extensions to the lines and drop the lines into the 5 gal
pail.
5. Using two people, start the motor for only couple of seconds. Do this to
identify which line the fluid will come out of. Now you know which line you
*must* keep in the bucket.
6. Again, using two people, (one to run the motor, the other to watch the
fluid) start the motor.
7. Run the motor until the fluid line begins spurting air. Shut motor off
immediately! The fluid will get quite frothy.
8. Allow to stand without the motor running for 4-5 minutes. This will let
excess fluid in the trans drain down into the pan.
9. Start the motor again for no more than 5 seconds. Shut off the motor.
This will pump out that last little bit in the pan and make dropping the pan
a lot less messy.
10. Let the oil lines drip into the pail while you drop the trans pan.
11. Drop the trans pan, and replace the filter using two (2) "O" rings at
the filter.
12. Hook up the two trans lines to the oil cooler at the radiator.
13. Fill the trans with about 7 quarts of trans fluid.
14. Start the motor and allow to idle for about 30 seconds or so before
checking fluid level.
15. Check fluid level and add accordingly.
16. Once full, drive until normal operating temp is reached, and recheck
fluid level. Add fluid to bring to "Full".
I've used this procedure on every auto trans that I've owned for .... well
.... forever.
This is just the way I do it....your mileage may vary.
Just my relatively informed, off the cuff, back yard mechanic, gut level,
eyeball it up and guesstimate, way of doing things....that's all...
--
Larry 
78 Royale w/500 Caddy
Menomonie, WI.
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Larry
Sent: Wednesday, 20 July 2011 10:53 PM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Synthetic ATF
Will,
Rob Mueller posted a procedure for changing fluid...quoteing something that
I wrote several years ago. I did a search for it but cannot find it.
Rob...you out there? Can you point us to it?
--
Larry
78 Royale w/500 Caddy
Menomonie, WI.
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i did that once when i had overheated the tranny. worked fine; filled it with Mobil 1.
Fred V
'77 Royale RB 455
P'cola, Fl
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