| Transmission Troubles [message #303007] |
Sun, 03 July 2016 16:39  |
DrPepper
Messages: 80
Registered: February 2013
Location: Goose Creek,SC
Karma: 0
|
Member |
|
|
Hello everyone. Was a not so much fun day today, I took the Grandkids to Folly Beach, SC today, as I was pulling into the camp ground I felt the transmission slip out of drive. I thought that maybe the fluid was low, so parked, sent the girls of to the beach and checked the fluid, but it was fine. When it was time to go home, it slowly got worse so that even low was slipping at a max speed of 13 miles an hour. It took 2 hours to drive 22 miles.
This is what I know:
She would slip(Pulse) from "S" to "L" if you tried to accelerate. The slower you accelerated the more it would pulse was from "L" to "S"(about once every one seconds). If you give it gas (3,000 RPM's), it would pulse less often but never shifted to "D"
Letting it cool had no effect
Uphill seemed to make it worse, but any wheel torque seemed to make it worse.
She would never go into Drive only "S" or "L"
I check the Vacuum line and it looks like it was replaced in 2006 during the overhaul. There may be a split in the line, but I would have to remove it tomorrow to check. The Transmission was replaced in 2006 by Dunn's Trans Service in Memphis, TN, with a new Heavy duty TC and electric Stepdown switch.
The Transmission has about 10,000 miles on it
Spedo Works fine, so assuming the gear is ok
Hoping this can be fixed without replacement, I had a trip to Hilton head planed on July 14th with the Grandkids, I really don't want to cancel it.
Anyone know of a good mechanic in Charleston SC?
Phillip Udel - I Own a 1975 Avion
|
|
|
|
| Re: Transmission Troubles [message #303016 is a reply to message #303007] |
Sun, 03 July 2016 19:50  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
|
Senior Member |
|
|
Call Manny and ask for help.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
|
|
|
|
| Re: Transmission Troubles [message #303035 is a reply to message #303007] |
Mon, 04 July 2016 00:50 |
Bullitthead
Messages: 1411
Registered: November 2013
Karma: 5
|
Senior Member |
|
|
Possibly the filter connection is leaking and letting it draw air and fluid and thus forcing the air into the system.
Terry Kelpien
ASE Master Technician
73 Glacier 260
Smithfield, Va.
|
|
|
|
| Re: Transmission Troubles [message #303039 is a reply to message #303035] |
Mon, 04 July 2016 05:45 |
94nubble
Messages: 275
Registered: July 2011
Location: Chesapeake VA
Karma: 3
|
Senior Member |
|
|
Bullitthead wrote on Mon, 04 July 2016 01:50Possibly the filter connection is leaking and letting it draw air and fluid and thus forcing the air into the system.
Drop the Transmission pan. The filter is only hand pressed into the valve body with an O ring seal. Mine fell out and the trans was doing what yours is. The filter should fit tight into the valve body firm to where you cannot even twist it.
Tom
Tom McManus
1977 Royale
Chesapeake VA
|
|
|
|
| Re: Transmission Troubles [message #303051 is a reply to message #303007] |
Mon, 04 July 2016 12:43 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
|
Senior Member |
|
|
On that note the Oring on the filter could have split so pull filter out inspect and reinstall. If you have a know good filter I would dump what fluid you can out the intake and reuse due to many new filters being poor fit. Question-- you are checking with engine running in Park right? Otherwise it will look full but not be full.
John Lebetski
Woodstock, IL
77 Eleganza II
|
|
|
|
| Re: Transmission Troubles [message #303065 is a reply to message #303007] |
Mon, 04 July 2016 18:22 |
DrPepper
Messages: 80
Registered: February 2013
Location: Goose Creek,SC
Karma: 0
|
Member |
|
|
GOOD NEWS.
took all day, but finally got under her to pull the pan.
when I touched the filter it fell into my hand. So I am thinking it was sucking air.
I also noticed that it had two O rings, and that the outside edge of the rings might be a little flat(maybe).
Fluid looked good, bottom of the pan looked good. the pan bolts where almost hand tight. When I put it back on, what should the torque be? and the rubber hose that connects above the pan was from 1975 so it was brittle and had to be leaking vacuum
Phillip Udel - I Own a 1975 Avion
|
|
|
|
| Re: [GMCnet] Transmission Troubles [message #303066 is a reply to message #303065] |
Mon, 04 July 2016 18:37 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
|
Senior Member |
|
|
In our shop, when we run into issue where we think a filter might have
started to drop, we over fill it and see.
Be careful on a new filters as the tube size can be small.
We have returned of 30 of the wrong tube sizes.
They ALL come from Communist China.
Non is manufactured in USA.
On Mon, Jul 4, 2016 at 4:22 PM, Phillip Udel wrote:
> GOOD NEWS.
> took all day, but finally got under her to pull the pan.
> when I touched the filter it fell into my hand. So I am thinking it was
> sucking air.
> I also noticed that it had two O rings, and that the outside edge of the
> rings might be a little flat(maybe).
> Fluid looked good, bottom of the pan looked good. the pan bolts where
> almost hand tight. When I put it back on, what should the torque be? and
> the
> rubber hose that connects above the pan was from 1975 so it was brittle
> and had to be leaking vacuum
>
>
>
> --
> Phillip Udel - www.gmcfabrication.com I Own a 1975 Avion, Still removing
> the Mothballs after sitting in storage for 10+ years
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
|
|
|
|
| Re: [GMCnet] Transmission Troubles [message #303069 is a reply to message #303065] |
Mon, 04 July 2016 18:57 |
RicksGMC
Messages: 145
Registered: May 2012
Karma: 0
|
Senior Member |
|
|
Torque on the tranny pan bolts is 12 ft/lbs according to the maintenance manual. Just did my pan gasket this afternoon.
Rick
Rick&Tammy Drummond
Prior Lake MN
'74 (re)Painted Desert
> On Jul 4, 2016, at 6:22 PM, Phillip Udel wrote:
>
> GOOD NEWS.
> took all day, but finally got under her to pull the pan.
> when I touched the filter it fell into my hand. So I am thinking it was sucking air.
> I also noticed that it had two O rings, and that the outside edge of the rings might be a little flat(maybe).
> Fluid looked good, bottom of the pan looked good. the pan bolts where almost hand tight. When I put it back on, what should the torque be? and the
> rubber hose that connects above the pan was from 1975 so it was brittle and had to be leaking vacuum
>
>
>
> --
> Phillip Udel - www.gmcfabrication.com I Own a 1975 Avion, Still removing the Mothballs after sitting in storage for 10+ years
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Rick
Rick&Tammy Drummond
Prior Lake MN
'74 (re)Painted Desert
|
|
|
|
| Re: Transmission Troubles [message #303073 is a reply to message #303007] |
Mon, 04 July 2016 19:54 |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
|
Senior Member |
|
|
Any vehicle i have pulled the tranny pan off, i always check and retorque the pan bolts a few times later. Once after a couple of heat/cool cycles. And if i do plan any longer travel. After anoil change or two, if they are still holding you should be good. Had the experience and have seen it happen to others: those bolts do come loose.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
|
|
|
|
| Re: Transmission Troubles [message #303105 is a reply to message #303007] |
Tue, 05 July 2016 11:41 |
DrPepper
Messages: 80
Registered: February 2013
Location: Goose Creek,SC
Karma: 0
|
Member |
|
|
Thanks for everyone's help
I did notice that when I put the new filter it fitted snug enough to stay, almost like it popped in place, but the far end of the filter still could be moved up and down about ¼ of an inch.
Hopefully that is normal..
I did a 20 mile test drive, and all seems well, it even feels better, maybe hopeful thinking.
Phillip Udel - I Own a 1975 Avion
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
