| Transmission Question [message #169264] |
Fri, 11 May 2012 15:03  |
Ross
Messages: 44
Registered: September 2011
Karma: 0
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My royale had been sitting in the driveway for about 5 months over the winter. When I went to move her, noticed the transmission was slipping. Big puddle under the tranny so I topper her up (down over 2 qts) and moved her twenty feet away.
Because of a medical condition I wasnt allowed to drive for 6 weeks. During those 6 weeks not a dropped leaked out.
Finally today I got her on the road for a 10 mile test drive. She shifted good and temp was about 190 for the first 8 miles then rose to 225 for the last two. I let her idle for a couple minutes and the temp went to 250. Checked the fluid level and was still full.
Last fall when I bought the royale from Stick and drove it back from Atlanta (900 miles) the transmission temp never rose past 195 degrees.
My first question is why would the transmission fluid leak over the winter and not during the past 6 weeks? Would the transmission leak be related to the rise in temperature or are these two seperate issues?
I would appreciate any comments.
Ross
Ross Hallman
78 Royale
Baden, On
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| Re: Transmission Question [message #169267 is a reply to message #169264] |
Fri, 11 May 2012 15:19  |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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I'd be looking for the temp problem first. Low coolant or stuck thermostat comes to mind.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Transmission Question [message #169273 is a reply to message #169264] |
Fri, 11 May 2012 15:43 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Ross,
I agree with Ken B about the temperature -- it's probably independent of
the transmission problem.
The torque converter (attached to the engine flywheel) is full of
transmission fluid (ATF) and sit above everything else in the transmission.
While there's a check valve to prevent that fluid from draining down into
the transmission pan, it's not perfect and most of them leak slowly. Over
the winter, several quarts of fluid could have leaked into the pan. Since
the normal fluid level in the pan is near the flange where it attaches to
the transmission housing, extra fluid will sit above the gasket and can
stimulate a leak. A leak can also develop around the O-ring on the
modulator (just above the pan flange at the right rear of the
transmission). It's not something to worry much about unless the leak
persists when you're using the coach frequently.
Hope you're doing much better with the medical condition.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL
www.gmcwipersetc.com
On Fri, May 11, 2012 at 4:03 PM, Ross Hallman <rhallman@rogers.com> wrote:
>
>
> My royale had been sitting in the driveway for about 5 months over the
> winter. When I went to move her, noticed the transmission was slipping.
> Big puddle under the tranny so I topper her up (down over 2 qts) and moved
> her twenty feet away.
> Because of a medical condition I wasnt allowed to drive for 6 weeks.
> During those 6 weeks not a dropped leaked out.
> Finally today I got her on the road for a 10 mile test drive. She shifted
> good and temp was about 190 for the first 8 miles then rose to 225 for the
> last two. I let her idle for a couple minutes and the temp went to 250.
> Checked the fluid level and was still full.
> Last fall when I bought the royale from Stick and drove it back from
> Atlanta (900 miles) the transmission temp never rose past 195 degrees.
> My first question is why would the transmission fluid leak over the winter
> and not during the past 6 weeks? Would the transmission leak be related to
> the rise in temperature or are these two seperate issues?
> I would appreciate any comments.
> Ross
> --
> Ross Hallman
> 78 Royale
> Baden, On
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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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 Question [message #169324 is a reply to message #169282] |
Sat, 12 May 2012 06:48 |
Ross
Messages: 44
Registered: September 2011
Karma: 0
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As a newbe I get a little paranoid with my new toy. It is a great help you experienced members pass on your pearls of wisdom to others.
I topped up the antifreeze yesterday and plan another test drive this morning. Hopefully the trans temp will drop.
Thanks again....Ross
Ross Hallman
78 Royale
Baden, On
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| Re: [GMCnet] Transmission Question [message #169325 is a reply to message #169324] |
Sat, 12 May 2012 06:59 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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OOoops! Ross, I misunderstood your temperature readings! I didn't catch
that you were reading TRANSMISSION temps! They ARE too high. I would not
expect to see anywhere near 190*F even out of the converter (which would be
about 50*F higher than in the pan) until after a much longer drive than you
took. Better get that checked out.
Sorry for the misleading information.
Ken H.
On Sat, May 12, 2012 at 7:48 AM, Ross Hallman wrote:
>
>
> As a newbe I get a little paranoid with my new toy. It is a great help
> you experienced members pass on your pearls of wisdom to others.
> I topped up the antifreeze yesterday and plan another test drive this
> morning. Hopefully the trans temp will drop.
> Thanks again....Ross
> --
>
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GMCnet mailing list
Unsubscribe or Change List Options:
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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: Transmission Question [message #169336 is a reply to message #169264] |
Sat, 12 May 2012 09:20 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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I write it off as the lazy man's partial trans fluid change. Confirm that coolant level as 100%. Does the engine temp track to some degree with the trans temp? However if coolant is low the temp gauge reading can be reading air and vapor and not correct.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: Transmission Question [message #169341 is a reply to message #169264] |
Sat, 12 May 2012 10:02 |
Ross
Messages: 44
Registered: September 2011
Karma: 0
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Member |
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John
I must had a brain f*rt yesterday. The transmission temp started at 90 degrees not 190 as I stated and went up to 150 at idle.
Today on the test drive trans temp went up to 130 while driving and again up to 150 at idle. The engine temp didn't go over 170.
As I mentioned yesterday on the trip from Atlanta she didnt go over 95 degrees.
Ross
Ross Hallman
78 Royale
Baden, On
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| Re: Transmission Question [message #169351 is a reply to message #169341] |
Sat, 12 May 2012 13:13 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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| Ross wrote on Sat, 12 May 2012 09:02 |
John
I must had a brain f*rt yesterday. The transmission temp started at 90 degrees not 190 as I stated and went up to 150 at idle.
Today on the test drive trans temp went up to 130 while driving and again up to 150 at idle. The engine temp didn't go over 170.
As I mentioned yesterday on the trip from Atlanta she didnt go over 95 degrees.
Ross
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Those look good. My trans temp is highest at idle.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: Transmission Question [message #169366 is a reply to message #169341] |
Sat, 12 May 2012 18:18 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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Sir: If you have any doubts, have the filter and fluid changed and catch a clean 2 oz in a sterile container and have an analysis done. Best $12 you will spend. Any city has oil analysis labs ask any local big truck dealer. The lab I use in Knoxville calls me in 1 HOUR with results and explains what is going on,with hard copy mailed. I file the receipts under preventive maintenance.
| Ross wrote on Sat, 12 May 2012 11:02 |
John
I must had a brain f*rt yesterday. The transmission temp started at 90 degrees not 190 as I stated and went up to 150 at idle.
Today on the test drive trans temp went up to 130 while driving and again up to 150 at idle. The engine temp didn't go over 170.
As I mentioned yesterday on the trip from Atlanta she didnt go over 95 degrees.
Ross
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C. Boyd
76 Crestmont
East Tennessee
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| Re: [GMCnet] Transmission Question [message #169396 is a reply to message #169325] |
Sun, 13 May 2012 01:54 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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| Ken Henderson wrote on Sat, 12 May 2012 06:59 |
OOoops! Ross, I misunderstood your temperature readings! I didn't catch
that you were reading TRANSMISSION temps! They ARE too high. I would not
expect to see anywhere near 190*F even out of the converter (which would be
about 50*F higher than in the pan) until after a much longer drive than you
took. Better get that checked out.
Sorry for the misleading information.
Ken H.
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I had the same misunderstanding...Sorry
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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