Transmission fluid leak at the speedometer gear

S

scott nutter1

New member
Jan 5, 2015
729
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Hello,
I have a small tranny fluid leak at the speedo gear housing. Probably 2 tablespoons while sitting for a week or more.
According to the manual, it is either the speedometer gear housing attaching screw or the speedo drive gear oring
I have headers, so I think I will need to remove the drivers side

Any words of wisdom on what to expect once I get in there?

Thanks, Scott..
--
Scott Nutter
1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, tankless water heater, everything Lenzi. Alex Ferrera
installed MSD Atomic EFI
Houston, Texas
 
No need to remove headers, undo the reducer and there is a steel bracket
with a bolt that attaches to the trans, remove it and pull the assembly. We
supply the rebuilt one with new seal and swap.

On Sat, Nov 16, 2019 at 3:01 PM Scott Nutter via Gmclist <

> Hello,
> I have a small tranny fluid leak at the speedo gear housing. Probably 2
> tablespoons while sitting for a week or more.
> According to the manual, it is either the speedometer gear housing
> attaching screw or the speedo drive gear oring
> I have headers, so I think I will need to remove the drivers side
>
> Any words of wisdom on what to expect once I get in there?
>
> Thanks, Scott..
> --
> Scott Nutter
> 1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final
> drive, Quad bags, tankless water heater, everything Lenzi. Alex Ferrera
> installed MSD Atomic EFI
> Houston, Texas
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmcrvparts.com
1-800-752-7502
 
Jim K,
I have the speedo that is corrected for the 3:21 final drive. Do you have the rebuilt one for that?
Scott.
--
Scott Nutter
1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, tankless water heater, everything Lenzi. Alex Ferrera
installed MSD Atomic EFI
Houston, Texas
 
You will reuse the plastic gear and we supply the Bullet with a new seal. I
believe we show that on our sight.

On Sat, Nov 16, 2019 at 4:42 PM Scott Nutter via Gmclist <

> Jim K,
> I have the speedo that is corrected for the 3:21 final drive. Do you have
> the rebuilt one for that?
> Scott.
> --
> Scott Nutter
> 1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final
> drive, Quad bags, tankless water heater, everything Lenzi. Alex Ferrera
> installed MSD Atomic EFI
> Houston, Texas
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmcrvparts.com
1-800-752-7502
 
**Update**
A little plug for Jim K at Applied.
I got his rebuilt speedometer gear housing. Only $20, and no more leaks!!
DO NOT OVERTIGHTEN the retaining clip bolt....6 lbs torque max....
Don't ask me how I know.....
Scott
--
Scott Nutter
1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, tankless water heater, everything Lenzi. Alex Ferrera
installed MSD Atomic EFI
Houston, Texas
 
Scott,

I bought one too. That fixed my transmission leak also!

Easy fix.

Gary Bovee
Red Bluff, CA
1978 GMC Royale
www.gmcidiotsguide.com

>
> **Update**
> A little plug for Jim K at Applied.
> I got his rebuilt speedometer gear housing. Only $20, and no more leaks!!
> DO NOT OVERTIGHTEN the retaining clip bolt....6 lbs torque max....
> Don't ask me how I know.....
> Scott
> --
> Scott Nutter
> 1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, tankless water heater, everything Lenzi. Alex Ferrera
> installed MSD Atomic EFI
> Houston, Texas
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
Kicking myself in the butt for not doing this sooner.......I have actually lost sleep over this...
Also kicking myself for going over the specified torque torque value.....
--
Scott Nutter
1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, tankless water heater, everything Lenzi. Alex Ferrera
installed MSD Atomic EFI
Houston, Texas
 
There is a refundable core charge on the unit.

On Mon, Nov 25, 2019 at 4:54 PM Scott Nutter via Gmclist <

> Kicking myself in the butt for not doing this sooner.......I have actually
> lost sleep over this...
> Also kicking myself for going over the specified torque torque value.....
> --
> Scott Nutter
> 1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final
> drive, Quad bags, tankless water heater, everything Lenzi. Alex Ferrera
> installed MSD Atomic EFI
> Houston, Texas
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmcrvparts.com
1-800-752-7502
 
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