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Home » Public Forums » GMCnet » Re: [GMCnet] Ok boys I need a transmission.
Re: [GMCnet] Ok boys I need a transmission. [message #343403] Thu, 16 May 2019 22:20 Go to next message
BobDunahugh is currently offline  BobDunahugh   United States
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Sounds like the splined shaft on the FD. The FD input shaft goes in the trans coupler. Bob Dunahugh
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Re: [GMCnet] Ok boys I need a transmission. [message #343405 is a reply to message #343403] Thu, 16 May 2019 23:26 Go to previous messageGo to next message
Larry is currently offline  Larry   United States
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BobDunahugh wrote on Thu, 16 May 2019 22:20
Sounds like the splined shaft on the FD. The FD input shaft goes in the trans coupler. Bob Dunahugh
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From Keith's description, it sounds like what happened to Dave Roberts. In his case, the trans coupler between the FD and trans broke with a loud bang. No gear including park worked. Might be worth looking at.

Larry Smile
78 Royale w/500 Caddy
Menomonie, WI.

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[GMCnet] Fw: Ok boys I need a transmission. [message #343416 is a reply to message #343403] Fri, 17 May 2019 10:02 Go to previous messageGo to next message
BobDunahugh is currently offline  BobDunahugh   United States
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The FD shaft could be fine. The coupler on the trans could have split. I can't remember right now if that coupler is a part of the trans output shaft. Ore just slides on the trans output shaft. Bob Dunahugh 78 Royale Iowa

________________________________
From: Bob Dunahugh
Sent: Thursday, May 16, 2019 10:20 PM
To: gmclist@list.gmcnet.org
Subject: RE: Ok boys I need a transmission.

Sounds like the splined shaft on the FD. The FD input shaft goes in the trans coupler. Bob Dunahugh
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Re: [GMCnet] Ok boys I need a transmission. [message #343420 is a reply to message #343416] Fri, 17 May 2019 12:58 Go to previous messageGo to next message
Keith V is currently offline  Keith V   United States
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Would the final drive be a cause of the split? Should i have it checked out?

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________________________________
From: Gmclist on behalf of Bob Dunahugh via Gmclist
Sent: Friday, May 17, 2019 10:02:01 AM
To: gmclist@list.gmcnet.org
Cc: Bob Dunahugh
Subject: [GMCnet] Fw: Ok boys I need a transmission.

The FD shaft could be fine. The coupler on the trans could have split. I can't remember right now if that coupler is a part of the trans output shaft. Ore just slides on the trans output shaft. Bob Dunahugh 78 Royale Iowa

________________________________
From: Bob Dunahugh
Sent: Thursday, May 16, 2019 10:20 PM
To: gmclist@list.gmcnet.org
Subject: RE: Ok boys I need a transmission.

Sounds like the splined shaft on the FD. The FD input shaft goes in the trans coupler. Bob Dunahugh
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Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com

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Re: [GMCnet] Ok boys I need a transmission. [message #343422 is a reply to message #343420] Fri, 17 May 2019 13:12 Go to previous messageGo to next message
James Hupy is currently offline  James Hupy   United States
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Manny told me once that if the pinion bearings in the final drive fail,
that it nearly always takes out the transmission as well.
Jim Hupy

On Fri, May 17, 2019, 10:59 AM Keith V via Gmclist
wrote:

> Would the final drive be a cause of the split? Should i have it checked
> out?
>
> Get Outlook for Android
>
> ________________________________
> From: Gmclist on behalf of Bob Dunahugh
> via Gmclist
> Sent: Friday, May 17, 2019 10:02:01 AM
> To: gmclist@list.gmcnet.org
> Cc: Bob Dunahugh
> Subject: [GMCnet] Fw: Ok boys I need a transmission.
>
> The FD shaft could be fine. The coupler on the trans could have split. I
> can't remember right now if that coupler is a part of the trans output
> shaft. Ore just slides on the trans output shaft. Bob Dunahugh 78 Royale
> Iowa
>
> ________________________________
> From: Bob Dunahugh
> Sent: Thursday, May 16, 2019 10:20 PM
> To: gmclist@list.gmcnet.org
> Subject: RE: Ok boys I need a transmission.
>
> Sounds like the splined shaft on the FD. The FD input shaft goes in the
> trans coupler. Bob Dunahugh
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> _______________________________________________
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Re: [GMCnet] Ok boys I need a transmission. [message #343425 is a reply to message #343422] Fri, 17 May 2019 16:43 Go to previous message
Richard Denney is currently offline  Richard Denney   United States
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Registered: April 2010
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Senior Member
Furthermore, even excessive longitudinal play in the final drive input
shaft can take out a transmission. Most original final drives in motor home
use that that sort of wear. Play is supposed to 0.008-0.012”, as I recall.

On Fri, May 17, 2019 at 2:29 PM James Hupy via Gmclist <
gmclist@list.gmcnet.org> wrote:

> Manny told me once that if the pinion bearings in the final drive fail,
> that it nearly always takes out the transmission as well.
> Jim Hupy
>
> --
'73 X-Glacier 230 "Jaws"
Northern Virginia
Offlist email: rick at rickdenney dot com
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