O" ring, Transmission Dipstick Tube.

LarryW

LarryW

Well-known member
Mar 28, 2002
6,044
767
113
Menomonie, WI.
I've got a leak around the dipstick tube. I replaced it about 4K miles ago, with a O ring out of one of those boxes that has multiple sizes to choose
from. Still leaks about 1 Qt in 4K. Where can I get the correct O ring for that tube. Part # anyone? TIA
--
Larry
78 Royale w/500 Caddy
Menomonie, WI.
 
> I think this is it (from my order history). I've not installed them, as I found some OEM Delcos on ebay. I'll see if I can find the Delco part
> #.
>
> https://www.amazon.com/gp/product/B000FMYQCQ

Hey, Thanks for the quick come-back. I'm on the road now, so cannot order from Amazon, but will try to find one at some parts store or...what-ever.
--
Larry
78 Royale w/500 Caddy
Menomonie, WI.
 
> > I think this is it (from my order history). I've not installed them, as I found some OEM Delcos on ebay. I'll see if I can find the Delco
> > part #.
> >
> > https://www.amazon.com/gp/product/B000FMYQCQ
>
> Hey, Thanks for the quick come-back. I'm on the road now, so cannot order from Amazon, but will try to find one at some parts store
> or...what-ever.

OH, the Delco part # would help a lot. Thanks.
--
Larry
78 Royale w/500 Caddy
Menomonie, WI.
 
Larry, I would also recommend putting a small amount of sealer around
it when you reinstall it.

> I think this is it (from my order history). I've not installed them, as I found some OEM Delcos on ebay. I'll see if I can find the Delco part #.
>
> https://www.amazon.com/gp/product/B000FMYQCQ
> --
> 77 Royale Coachmen Side Dry Bath
> 76 Birchaven Coachmen Side Wet Bath
> 76 Eleganza
> Elizabeth City, NC
>
>
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--
Ray Erspamer
78 Royale - "The Great Lakes Eagle"
Center Kitchen TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMCRoyale
414-484-9431
Web Site: http://ray-lisa.page.tl/
 
Are you sure the trans is not over filled or the vent plugged? I don't
think the fluid should be trying that hard to get around the o ring.

Sully
77 eleganza 2
Seattle

>
> > I think this is it (from my order history). I've not installed them, as
> I found some OEM Delcos on ebay. I'll see if I can find the Delco part
>
> > #.
>
> >
>
> > https://www.amazon.com/gp/product/B000FMYQCQ
>
>
>
> Hey, Thanks for the quick come-back. I'm on the road now, so cannot order
> from Amazon, but will try to find one at some parts store or...what-ever.
>
> --
>
> Larry
>
> 78 Royale w/500 Caddy
>
> Menomonie, WI.
>
>
>
> _______________________________________________
>
> GMCnet mailing list
>
> Unsubscribe or Change List Options:
>
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
 
Larry, Most of us that work on the GMC MH on a regular based always
augment the O ring with RTV sealant. Make sure all surfaces are dry of lub.
Also check the speedo gear assembly as they do leak.
Majority of the time, the fill tube leaks is when it sits for over a week
and the converter bleeds down and the fluid level goes up few inches .

> > > I think this is it (from my order history). I've not installed them,
> as I found some OEM Delcos on ebay. I'll see if I can find the Delco
> > > part #.
> > >
> > > https://www.amazon.com/gp/product/B000FMYQCQ
> >
> > Hey, Thanks for the quick come-back. I'm on the road now, so cannot
> order from Amazon, but will try to find one at some parts store
> > or...what-ever.
>
> OH, the Delco part # would help a lot. Thanks.
> --
> Larry
> 78 Royale w/500 Caddy
> Menomonie, WI.
>
> _______________________________________________
> 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
http://www.appliedgmc.com
1-800-752-7502
 
The O-ring listed by Larry is not an ideal replacement. The original and correct replacement are a slightly oval in design not round.
Here is where you can get them.

http://www.makcotransmissionparts.com/44371A.html

and 4371A O-ring, GM/Ford/Chrysler Filler tube A904 (TF6) Mopar part Number 6030608

http://www.ebay.com/itm/like/271921045150?lpid=82&chn=ps&ul_noapp=true

J.R. Wright
GMC GreatLaker 18 Year Member
GMCGL Tech Editor
GMC Eastern States Charter Member
GMCMI 18 Year Member
78 Buskirk 30' Stretch
1975 Avion (Under Reconstruction)
Michigan

>
> Larry, Most of us that work on the GMC MH on a regular based always
> augment the O ring with RTV sealant. Make sure all surfaces are dry of lub.
> Also check the speedo gear assembly as they do leak.
> Majority of the time, the fill tube leaks is when it sits for over a week
> and the converter bleeds down and the fluid level goes up few inches .
>

>

>>>> I think this is it (from my order history). I've not installed them,
>> as I found some OEM Delcos on ebay. I'll see if I can find the Delco
>>>> part #.
>>>>
>>>> https://www.amazon.com/gp/product/B000FMYQCQ
>>>
>>> Hey, Thanks for the quick come-back. I'm on the road now, so cannot
>> order from Amazon, but will try to find one at some parts store
>>> or...what-ever.
>>
>> OH, the Delco part # would help a lot. Thanks.
>> --
>> Larry
>> 78 Royale w/500 Caddy
>> Menomonie, WI.
>>
>> _______________________________________________
>> 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
> 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
 
Just an update to the O ring issue. I got under there for a second time to look close at it and there was a regular stream of ATF coming out right at
the base of the filler tube. I went to the local Chrysler dealership and ordered the Mopar part Number 6030608. Also got a O ring with the suggested
dimentions from a NAPA dealer. I took a caliper to both and found no difference accept price. Chrysler dealer was 4 times as expensive. That's ok
when you are talking under $5 anyway. So....I've got an extra. When I took the dipstick tube out, I found that because I had put a similiar O ring
from one of those all inclusive kits of O rings, the ring did not fit as it should and tore a little when installed. Also used the suggestion of
putting a little silicone sealer on it when installing. That made it slippery so that it just slid right in with no extra force needed. Anyway,
thanks to all that responded. Will find out if all is well in a couple of days when the converter leaks down enough to reach the tube hole.
--
Larry
78 Royale w/500 Caddy
Menomonie, WI.
 
Sorry about my comm earlier on your post. I though you were trying to seal
the stick to the tube not the tube to the trans

Sully
77 eleganza 2
Seattl

> I hope that means your Engine is running well?
>
>
>
>
>
> --
>
> Jon Roche
>
> 75 palm beach
>
> St. Cloud, MN
>
> http://lqqkatjon.blogspot.com/
>
>
>
> _______________________________________________
>
> GMCnet mailing list
>
> Unsubscribe or Change List Options:
>
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
 
> Sorry about my comm earlier on your post. I though you were trying to seal
> the stick to the tube not the tube to the trans
>
> Sully
> 77 eleganza 2
> Seattl

Hey Sully,
Any comment is a good comment. I appreciate anyone that gives the time to help me think these things out. I knew it was not over full, but did check
the vent. It was a possibility as this has happened since I put the trans back in. who knows...maybe I bent the vent during the install.
Anyway....thanks!!
--
Larry
78 Royale w/500 Caddy
Menomonie, WI.
 
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