| [GMCnet] Transmission oil level [message #96062] |
Mon, 16 August 2010 12:21  |
paul h cashman
Messages: 176
Registered: May 2005
Karma: 0
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Senior Member |
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Hi All,
I checked my Transmission oil level today ambient Temperature.
The Oil level was five inches above full ,eight inches total.
I checked it hot and the level was about 1/2 Pint low, below Full.
I had ,always checked it hot.
The GMC Manual ,shows cold level, lower than hot about one inch.
Paul Cashman
Riverdale GA
78 Transmode
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Paul H Cashman
Riverdale Ga
1978 Transmode
1975 Corvette
1978 Beetle Convertible
1989 Harley Davidson Sportster
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| Re: [GMCnet] Transmission oil level [message #96067 is a reply to message #96062] |
Mon, 16 August 2010 12:56  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Paul,
I think you just experienced torque converter leak-down. There's a
difference between "long time cold", "cold", and "hot". But "long time
cold" should become "cold" almost immediately when you crank the engine,
refilling the torque converter. "Hot" happens only after a long, hard run.
Ken H.
On Mon, Aug 16, 2010 at 1:21 PM, Paul Cashman <paulcashman@bellsouth.net>wrote:
> Hi All,
> I checked my Transmission oil level today ambient Temperature.
> The Oil level was five inches above full ,eight inches total.
> I checked it hot and the level was about 1/2 Pint low, below Full.
> I had ,always checked it hot.
> The GMC Manual ,shows cold level, lower than hot about one inch.
>
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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] Transmission oil level [message #96075 is a reply to message #96062] |
Mon, 16 August 2010 13:37 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Senior Member |
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On Aug 16, 2010, at 11:21 AM, Paul Cashman wrote:
> Hi All,
> I checked my Transmission oil level today ambient Temperature.
> The Oil level was five inches above full ,eight inches total.
> I checked it hot and the level was about 1/2 Pint low, below Full.
> I had ,always checked it hot.
> The GMC Manual ,shows cold level, lower than hot about one inch.
> Paul Cashman
> Riverdale GA
> 78 Transmode
You really should check it hot. That will be most accurate.
The high level is from your torque converter leaking down into the pan. That is common and nothing to worry about.
Emery Stora
77 Kingsley
Santa Fe, NM
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| Re: [GMCnet] Transmission oil level [message #96138 is a reply to message #96062] |
Mon, 16 August 2010 19:11 |
paul h cashman
Messages: 176
Registered: May 2005
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Hi Emery,
Thanks for replying.
I always check the fluid hot.
Last month on a trip to Florida Panhandle ,going up a grade, the Transmission didnt want to shift to high gear.I backed off on the throttle and acellareted again and it shifted ok.
This happened on the way home also.Two times.
I checked the fluid level each time and it was ok.
Today ,I thought I would check and see if I could find anything, that would cause the problem.
I started, by checking the fluid level and saw that it was higher ,than I antisipated ,I thought maybe the Torque Converter was at fault.
running normal Temperature ,the level was ok.
Paul Cashman
Riverdale GA
Paul H Cashman
Riverdale Ga
1978 Transmode
1975 Corvette
1978 Beetle Convertible
1989 Harley Davidson Sportster
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| Re: [GMCnet] Transmission oil level [message #96142 is a reply to message #96062] |
Mon, 16 August 2010 19:51 |
kingd
Messages: 592
Registered: June 2004
Karma: 2
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I don't know specifically about the GMC MH but all the American made vehicles i've had/have specify that the engine MUST(capitals mine)be running when checking Trans fluid level. The fluid level being high with the engine off, especially for a while is not surprising to me.. I believe the real important part is that the level NOT show overfilled, engine running and trans fluid HOT. I would expect a normal summer drive including a bit of high speed would create HOT fluid in a GMC MH.
DAVE KING
(26' SOB Class A)
DAVE KING
lurker, wannabe
Toronto, Ontario, Canada
[Updated on: Mon, 16 August 2010 19:52] Report message to a moderator |
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