Transmission leak

[tom geiger]

Ok, so I've done everything I was told to to get this transmission pan to stop leaking and it hasn't. Still leaving puddles on my driveway. Started up
this morning and it would not engage in drive so apparently its low on fluid. Just started this so how much fluid would you expect I need to put in
it? I'm planning on ordering a vented aluminum pan from Jim after camping is finished this season.

Tom
76 Eleganza 2
Kansas City, Mo

 

[Irish Rogue]

Up to the full line on the dipstick while engine is running and tranny up to normal operating temp.
Mike/The Corvair a holic

Sent from my iPhone

>
> Ok, so I've done everything I was told to to get this transmission pan to stop leaking and it hasn't. Still leaving puddles on my driveway. Started up
> this morning and it would not engage in drive so apparently its low on fluid. Just started this so how much fluid would you expect I need to put in
> it? I'm planning on ordering a vented aluminum pan from Jim after camping is finished this season.
>
> Tom
> 76 Eleganza 2
> Kansas City, Mo
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

 

[Deb]

If you have a copy of the maintenance manual on page 7-27 (Transmission) it gives the expected levels at various temps. It's hard to get it to
operating temperature if you can't drive it, I would imagine.
If it has been parked and isn't running, you would expect the level to be well above the FULL mark - a couple of inches.
Let the engine run a few minutes and shift the transmission through it's gears to get the fluid moving and into it's proper place

This is directly from the Maintenance Manual 75-76 X7525 (won't be in the 77-78 supplement, if that's all you have)

With your fingers, Check the temperature of the end of your dipstick.

At room temp (cool to the touch) - should be between 1/8 - 3/8" below the ADD mark
If it's warm (not hot) should be close to the ADD mark (slightly above or below)
If Hot (can't hold it comfortably) then it should be between the ADD & FULL marks.

Theres a chart on 7-28 that shows where you would expect it to be at various temps. I printed it out and added it to my manual supplement for
reference. I have just gone through leaking tranny diagnostics and repair. It came in handy.

--
Deb McWade
Logan Lake, BC, CAN
"Li'l Sister"
'77 Kingsley, 403, EBL EFI;
TZE167V101404
It's Bigger on the Inside!

 

[scott nutter1]

Tom,
Are you sure it's the pan? Maybe Speedo gear/cable, modulator, or even the o ring at the dip stick, or even tranny cooler lines? Seems like a lot
of fluid to be seeping out of a semi porous aluminum pan..
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]

I feel Scott is correct in addressing the other things.
The Modulator , as it is in the fluid level.
Does the leak develop after it has been prked forcouple days? If so the
fill tube at the final drive is alwys a suspect.

On Tue, Oct 8, 2019 at 2:28 PM Scott Nutter via Gmclist <

> Tom,
> Are you sure it's the pan? Maybe Speedo gear/cable, modulator, or even
> the o ring at the dip stick, or even tranny cooler lines? Seems like a
> lot
> of fluid to be seeping out of a semi porous aluminum pan..
> 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.appliedgmc.com
1-800-752-7502

 

[tom geiger]

Great info guys. I'll let it warm up and check the level. Refill will be base on temp guidlines. Great info

Thanks,
TG