| Speedo seal [message #168704] |
Mon, 07 May 2012 00:31  |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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Does anyone have the part description or better yet a part number for the seal that the speedometer cable sits in on the transmission. The last one I bought was orange, but it replaced a gray colored one.
The problem is an annoying tranny drip that isn't the pan or modulator.
Ideas?
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: Speedo seal [message #168818 is a reply to message #168704] |
Mon, 07 May 2012 20:26  |
bobby5832708
Messages: 237
Registered: November 2006
Location: Winter Springs FL
Karma: 3
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Senior Member |
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Randy,
I went through this several years ago, here's what I found.
In the GMC parts book on page 17-2 (picture) and 17-3 (part descriptions) look at part 19, the "sleeve assy, speedo drive gear". It's GM part number 404024 which crosses to Delco part 25519848 and both were obsoleted years ago.
Now the good news. When you remove the "sleeve assy, speedo drive gear" from the transmission you will see that the only wearable parts on it are the O-ring on the outside (available at any decent auto parts store) and the small lip seal, GM part 1240382 (available from any GM dealer), on the inside. Both rubber parts are easily replaced.
I don't see why GM wanted to sell an entire assembly when all that needs replacing are the rubber parts. Mine has been leak-free for several years now and the cost was probably just a few bucks.
Bob Heller
2017 Winnebago 29VE
Winter Springs FL
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| Re: Speedo seal [message #168879 is a reply to message #168704] |
Tue, 08 May 2012 06:34 |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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I used to brag about how leak free my coach was and how friendly to the environment I was because of that. Then a friend reminds me that at 8 MPG, I'm no freakin' environmentalist!
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: Speedo seal [message #169008 is a reply to message #168879] |
Tue, 08 May 2012 23:19 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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| Luvn737s wrote on Tue, 08 May 2012 06:34 |
I used to brag about how leak free my coach was and how friendly to the environment I was because of that. Then a friend reminds me that at 8 MPG, I'm no freakin' environmentalist!
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But you are. You are keeping a big lump out of the junk yard. Also consider the carbon footprint involved with making a new SOB MH, high mpg or otherwise. Also what is the environmental load of someone jumping on an airliner and flying 2000 miles for a vacation, renting a car, staying at hotels (with all their energy loads and laundry) vs traveling to a close vacation spot in the GMCMH.
BTW, unlike many of my posts, this comment is serious.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: [GMCnet] Speedo seal [message #169018 is a reply to message #169008] |
Wed, 09 May 2012 07:01 |
Jim Bounds
Messages: 842
Registered: January 2004
Karma: 0
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Exactly correct Steve, this fact is what drives our business. We (the GMC) really is the "cheapest toy in the box". The carbon has already been burned to produce the coach and really you should strive for 10 MPG, at that you are not burning much more fuel if any than a Suburban and heck, you can take a shower--- carry a pile of stuff and not have to rent a room full of bedbugs while travelling! Why do you see people actually living in older motorhomes, they canot afford anything else which means it is a really cheap way to live! Also, the carbon footprint thing really makes us a good choice for those who think through the issue. Hey, a little dripping oil might make it back down underground-- maybe they could say we are doing our part to replentish the American oil supply!
Jim Bounds
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________________________________
From: Steve Southworth <midlf@centurytel.net>
To: gmclist@temp.gmcnet.org
Sent: Wednesday, May 9, 2012 12:19 AM
Subject: Re: [GMCnet] Speedo seal
Luvn737s wrote on Tue, 08 May 2012 06:34
> I used to brag about how leak free my coach was and how friendly to the environment I was because of that. Then a friend reminds me that at 8 MPG, I'm no freakin' environmentalist!
But you are. You are keeping a big lump out of the junk yard. Also consider the carbon footprint involved with making a new SOB MH, high mpg or otherwise. Also what is the environmental load of someone jumping on an airliner and flying 2000 miles for a vacation, renting a car, staying at hotels (with all their energy loads and laundry) vs traveling to a close vacation spot in the GMCMH.
BTW, unlike many of my posts, this comment is serious.
--
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: Speedo seal [message #169034 is a reply to message #169008] |
Wed, 09 May 2012 10:04 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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So what about when I have my secondaries full open as I am passing a Prius on the right because he refuses to get out of the way? 
| midlf wrote on Tue, 08 May 2012 21:19 |
| Luvn737s wrote on Tue, 08 May 2012 06:34 |
I used to brag about how leak free my coach was and how friendly to the environment I was because of that. Then a friend reminds me that at 8 MPG, I'm no freakin' environmentalist!
|
But you are. You are keeping a big lump out of the junk yard. Also consider the carbon footprint involved with making a new SOB MH, high mpg or otherwise. Also what is the environmental load of someone jumping on an airliner and flying 2000 miles for a vacation, renting a car, staying at hotels (with all their energy loads and laundry) vs traveling to a close vacation spot in the GMCMH.
BTW, unlike many of my posts, this comment is serious.
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-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: Speedo seal [message #169049 is a reply to message #169034] |
Wed, 09 May 2012 12:44 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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""So what about when I have my secondaries full open as I am passing a Prius on the right because he refuses to get out of the way?
""
I realize why a Prius gets such good mileage --the drivers all run 20mph under the speed limit 
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Speedo seal [message #169059 is a reply to message #169049] |
Wed, 09 May 2012 13:49 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Cmon, they're pedalling as fast as they can.
--johnny
'76 23' transmode norris
'76 palm beach
From: Bob de Kruyff <NEXT2POOL@AOL.COM>
To: gmclist@temp.gmcnet.org
Sent: Wednesday, May 9, 2012 1:44 PM
Subject: Re: [GMCnet] Speedo seal
""So what about when I have my secondaries full open as I am passing a Prius on the right because he refuses to get out of the way?
""
I realize why a Prius gets such good mileage --the drivers all run 20mph under the speed limit :)
--
Bob de Kruyff
78 Eleganza
Chandler, AZ
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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
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| Re: Speedo seal [message #283108 is a reply to message #168704] |
Sat, 25 July 2015 12:02 |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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I replaced the o-ring with one that should unquestionably seal (if the effort to install it is any indicator) and the lip seal has been replaced but it leaks worse than ever. Is there a seal on the end of the speedometer cable that could be missing too? My cable doesn't seem to want to tighten down to eliminate all play in the cable.
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: Speedo seal [message #283140 is a reply to message #168704] |
Sat, 25 July 2015 19:08 |
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SeanKidd
Messages: 747
Registered: June 2012
Location: Northern Neck Virginia
Karma: 4
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Inquiring minds would like to know, I recently developed a leak here too... I'm running a reduction gear for my 3.70FD, but it won't tighten, like its stripped...is this a repairable item?
The TH350 driven gear housing looks very similar...are they interchangeable?
Sean and Stephanie
73 Ex-CanyonLands 26' #317 "Oliver"
Hubler 1-Ton, Quad-Bags, Rear Disc, Reaction Arms, P.Huber TBs, 3.70:1 LSD Honda 6500 inverter gen.
Colonial Travelers
[Updated on: Sat, 25 July 2015 19:19] Report message to a moderator |
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| Re: [GMCnet] Speedo seal [message #283144 is a reply to message #283140] |
Sat, 25 July 2015 19:32 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Randy,
The cable is not the source of the leak.
The plastic gear that is housed inside the steel torpedo shaped device has
a red high silicon seal and an outer O ring.
Let me know as I have few her for sale, but since you have done so much for
our customers, I will send one to you N/C, just want the old as a core.
On Sat, Jul 25, 2015 at 5:08 PM, Sean Kidd wrote:
> Inquiring minds would like to know, I recently developed a leak here
> too... I'm running a reduction gear for my 3.70FD, but it won't tighten,
> like its
> stripped...is this a repairable item?
>
> --
> Sean and Stephanie
> 73 Ex-CanyonLands 26' #317 "Oliver"
> Hubler 1-Ton, Quad-Bags, Rear Disc, Reaction Arms, P.Huber TBs, 3.70:1 LSD
> Honda 6500 inverter gen.
>
> Colonial Travelers
>
> _______________________________________________
> 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
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: Speedo seal [message #283153 is a reply to message #168704] |
Sat, 25 July 2015 22:04 |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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Senior Member |
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Thanks Jim! I've replaced both (although the new silicone seal from the Chevy Dealer is grey, not red. Maybe that's the problem) . I need to check the seal to see if the gear drive shaft has pushed the seal out of position.
Randy
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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