Transmission fluid leak at the speedometer gear

[scott nutter1]

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

 

[jim kanomata1]

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

 

[scott nutter1]

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

 

[jim kanomata1]

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

 

[scott nutter1]

**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

 

[gcbgold]

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

 

[scott nutter1]

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

 

[jim kanomata1]

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