| Tranny head scratcher [message #81791] |
Sat, 24 April 2010 22:25  |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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When my coach has been sitting or is cold and I put it into reverse to back out, it goes into reverse fine. The first time I go into drive it balks unless I slip it into S or L and then into drive. Every other time it goes into drive fine and it makes no unusual sounds or shakes ind it doesn't leak more than an occasional drip or two. Fluid level stays fine.
Is this a warning sign, or are there bigger things to worry about?
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: Tranny head scratcher [message #81793 is a reply to message #81791] |
Sat, 24 April 2010 22:51  |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Try changing the trans fluid. Might as well change the the filter while you are there.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Tranny head scratcher [message #81819 is a reply to message #81793] |
Sun, 25 April 2010 09:37 |
Luvn737s
Messages: 1106
Registered: June 2007
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| Ken Burton wrote on Sat, 24 April 2010 20:51 |
Try changing the trans fluid. Might as well change the the filter while you are there.
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I changed the fluid and filter about 1600 miles ago. In warm weather it doesn't do it. And if you "prompt" it with a shift into S or L it goes right in.
GM tranny have "bands" as opposed to Mopar which use pumps, right?
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: [GMCnet] Tranny head scratcher [message #81821 is a reply to message #81819] |
Sun, 25 April 2010 09:57 |
powerjon
Messages: 2446
Registered: January 2004
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Did you use 2 o-rings on the filter??
J.R.
On Apr 25, 2010, at 10:37 AM, Randy wrote:
>
>
> Ken Burton wrote on Sat, 24 April 2010 20:51
>> Try changing the trans fluid. Might as well change the the filter
>> while you are there.
>
> I changed the fluid and filter about 1600 miles ago. In warm weather
> it doesn't do it. And if you "prompt" it with a shift into S or L it
> goes right in.
>
> GM tranny have "bands" as opposed to Mopar which use pumps, right?
> --
> Randy
> 1973 26' Painted Desert
> Ahwatukee (Phoenix) AZ
> _______________________________________________
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: Tranny head scratcher [message #81885 is a reply to message #81791] |
Sun, 25 April 2010 23:03 |
Luvn737s
Messages: 1106
Registered: June 2007
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Well now it made a liar out of me by not going into drive, S or L without a few sticky shifts. I think I'll try a new trans cable since it needs one anyhow and see if that helps.
Also it was balky about kicking down, but after a try or two, it di just fine. Fluid looks and smells ok.
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
[Updated on: Sun, 25 April 2010 23:05] Report message to a moderator |
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| Re: Tranny head scratcher [message #81921 is a reply to message #81791] |
Mon, 26 April 2010 10:09 |
Luvn737s
Messages: 1106
Registered: June 2007
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Would it only suck air in drive, rather than reverse? I admit that auto trans is a bit of black magic to me.
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: Tranny head scratcher [message #81927 is a reply to message #81921] |
Mon, 26 April 2010 10:30 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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| Luvn737s wrote on Mon, 26 April 2010 10:09 |
Would it only suck air in drive, rather than reverse? I admit that auto trans is a bit of black magic to me.
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Read Manny's answer to Dan's problem. That may answer some of your questions.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: Tranny head scratcher [message #81928 is a reply to message #81791] |
Mon, 26 April 2010 10:39 |
Luvn737s
Messages: 1106
Registered: June 2007
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Yeah, my symptoms are a little different. And it seems to clear up after a little while. I just want that clearing up to remain permanent.
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: [GMCnet] Tranny head scratcher [message #82163 is a reply to message #81948] |
Tue, 27 April 2010 19:25 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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| mannystrans wrote on Mon, 26 April 2010 12:52 |
Randy,
When you lube or replace the shift cable, more than likely, your
problem will go away.
One of our vendors once called me because he couldn't get the tranny
out of park.
Turned out that the cable froze. After replacing the cable, tranny shifted fine.
--
Manny Trovao
mannystrans@hughes.net
Manny's Trans / Power Drive
San Jose, California
408-937-1583
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I made a posting here about a year ago about this same problem. I simply cleaned the rust off of the bottom end of the cable (transmission end) and coated it with anti-seize to prevent it from happening again. This is heck of a lot cheaper than buying a new one and it will probably last longer due to the anti-seize coating.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Tranny head scratcher [message #82208 is a reply to message #81791] |
Wed, 28 April 2010 00:05 |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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I've got a new cable coming from JimK. back when I thought I wanted to sell it every prospective buyer had a hard time shifting it, but for me it worked fine. As one of the sages here rightly said about driving these coaches in the mountains, a good shift cable is almost as important as good brakes.
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: Tranny head scratcher [message #84459 is a reply to message #82208] |
Thu, 13 May 2010 21:54 |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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Replaced the cable and still get no consistent engagement (reverse is okay for the first shift, but then it goes away too). No noise or anything, it just doesn't engage. When I fianlly do get reverse and drive to engage, it works fine and I can't replicate the problem. It doesn't engage harshly and it doesn't get hot.
Any other ideas?
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: [GMCnet] Tranny head scratcher [message #84486 is a reply to message #84482] |
Fri, 14 May 2010 05:19 |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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Senior Member |
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Yep, that the way it is and it's as tight as I dare. Is there something internal to the shifter that could be clogged causing it to not allow fluid to flow once drive or reverse is selected?
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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