Best transmission fluid for 3-speed? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dznucks · 09-12-2008, 01:00 PM

Whats the best transmission fluid to use in a 3-speed colum shift? Its a 69 with the original transmission from when it had a I-6.

cdowns · 09-12-2008, 01:45 PM

usually 90weight gear oil for a 3speed manual tranny

dznucks · 09-12-2008, 02:22 PM

got it

thanks

Longhorn Man · 09-12-2008, 04:06 PM

I would say the synthetic gear oil personally... I think it's usually called 75/90... something like that anyways.

dznucks · 09-12-2008, 05:06 PM

Stupid question, how do you drain the oil?

Not sure exactly what kind of tranny it is. the numbers are GM16 8(or 3)82547, it is a three speed column shift from an original I-6 and its a '69

**Palf70Step** · 09-12-2008, 05:10 PM

Some of them have a drain plug that will"drain" out. I think there are some that you have to pump the oil/fluid out before you add the new stuff. I do not remember if our standard 3 on the tree tranny had a drain pulg or not.

PanelDeland · 09-12-2008, 05:10 PM

Some have a drain in the bottom of the tranny,others don't.Usually a vacuum pump is used to remove the gear oil from them.I have pulled the side cover to get the last of it out(the truck was in a flood up to the bottom of the windows).If you pull the side cover be very careful since the shift forks may not line up if you aren't familiar with them.

dznucks · 09-12-2008, 05:19 PM

ok. i'll pump it.

i've been hearing a funny wine, tansmission rpm specific. almost like going fast in reverse just not as loud. the level was slightly under the one plug (on passengers side), 1/2" but it was dark brown like engine oil. ???

09-12-2008, 01:00 PM	#1
dznucks Registered User Join Date: Feb 2006 Location: Smyrna, Ga Posts: 1,647	Best transmission fluid for 3-speed? Whats the best transmission fluid to use in a 3-speed colum shift? Its a 69 with the original transmission from when it had a I-6.

09-12-2008, 01:45 PM	#2
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Best transmission fluid for 3-speed? usually 90weight gear oil for a 3speed manual tranny __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

09-12-2008, 02:22 PM	#3
dznucks Registered User Join Date: Feb 2006 Location: Smyrna, Ga Posts: 1,647	Re: Best transmission fluid for 3-speed? got it thanks

09-12-2008, 04:06 PM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: Best transmission fluid for 3-speed? I would say the synthetic gear oil personally... I think it's usually called 75/90... something like that anyways.

09-12-2008, 05:06 PM	#5
dznucks Registered User Join Date: Feb 2006 Location: Smyrna, Ga Posts: 1,647	Re: Best transmission fluid for 3-speed? Stupid question, how do you drain the oil? Not sure exactly what kind of tranny it is. the numbers are GM16 8(or 3)82547, it is a three speed column shift from an original I-6 and its a '69

09-12-2008, 05:10 PM	#6
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,083	Re: Best transmission fluid for 3-speed? Some of them have a drain plug that will"drain" out. I think there are some that you have to pump the oil/fluid out before you add the new stuff. I do not remember if our standard 3 on the tree tranny had a drain pulg or not. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

09-12-2008, 05:10 PM	#7
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: Best transmission fluid for 3-speed? Some have a drain in the bottom of the tranny,others don't.Usually a vacuum pump is used to remove the gear oil from them.I have pulled the side cover to get the last of it out(the truck was in a flood up to the bottom of the windows).If you pull the side cover be very careful since the shift forks may not line up if you aren't familiar with them. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

09-12-2008, 05:19 PM	#8
dznucks Registered User Join Date: Feb 2006 Location: Smyrna, Ga Posts: 1,647	Re: Best transmission fluid for 3-speed? ok. i'll pump it. i've been hearing a funny wine, tansmission rpm specific. almost like going fast in reverse just not as loud. the level was slightly under the one plug (on passengers side), 1/2" but it was dark brown like engine oil. ???

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