Synchromesh oil getrag 5 speed question (Page 1/1)
zobari DEC 20, 02:18 PM
Hi,

I've buy german tranny oil synchromesh RAVENOL.
Below, I upload images, This oil is it compatible with my getrag 5 speed transmission v6 1988 fiero ?

Currently, I have filled my tranny with 5w30 castrol edge tibanium Last year and I want to change to synchromesh transmission oil.



[This message has been edited by zobari (edited 12-20-2019).]

zobari DEC 20, 04:04 PM
I can see these gm reference :

GENERAL MOTORS 12345349
GENERAL MOTORS 9985648
GENERAL MOTORS 1052931
GENERAL MOTORS 12377916
GENERAL MOTORS 9985535
GENERAL MOTORS 12345577
GENERAL MOTORS 9986105

The webstie : ravenol web page

I think that's ok for getrag.

[This message has been edited by zobari (edited 12-20-2019).]

Gall757 DEC 20, 04:34 PM
Yes, 9985648 is the GM Synchromesh number.
Blacktree DEC 20, 04:37 PM
At least 3 of those part numbers are applicable to the Fiero gearbox (12345349, 12345577, and 9985648). So yes, that should be fine in your gearbox.

Side Note: These gearboxes originally used Dexron-3 ATF or 5w30 engine oil. But later the specification was updated to include Synchromesh oil. Synchromesh is better. You'll notice the difference.
zobari DEC 20, 04:39 PM
Many thanks guys.
zobari DEC 21, 10:07 AM
Hi,

I have another question.
For the drain plug what is the diamater of the gasket ?
I want to change and put a new gasket on this drain plug.