I ripped out a tranny from a 4spd 85GT and put it in a 86SE, but I'm not sure what type of gear oil to use?

I was told to use syncromesh. I have it in the transmission to my IMSA. I dont know what its like to use as i ahvent been able to drive the car yet but all i can say is if your transmission has leaks this stuff will fint it quick.

Syncromesh is the best choice, but a close runner-up (and cheaper) is 5W30 engine oil. That's what GM originally specified for the trannies.

quote Originally posted by Bloozberry: Syncromesh is the best choice, but a close runner-up (and cheaper) is 5W30 engine oil. That's what GM originally specified for the trannies.

5W30 will work okay until the winter temps kick in. Then you'll fight to shift between gears.
I changed to synchromesh and it was like having a rebuilt tranny. Even in the teens F.

Spoon

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Two yeast spent their entire life "about 2 days" discussing what the purpose of life could be and not once did they even come close to the fact that they were making champagne. Quoted by: Unknown

In case it hasn't been said enough times already...

quote Originally posted by Blacktree: In case it hasn't been said enough times already...

X2. Day and night difference with results immediately. $7 a bottle but worth every penny.

$5-7 and you don't change it like motor oil... last about 30-50,000 miles or more. Cheap insurance.

also see cave, stick in axle & trans section
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Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)

The Ogre's Fiero Cave (It's also at the top and bottom of every forum page...)

[This message has been edited by theogre (edited 12-12-2010).]

Another vote for the Syncromesh.
If you go with a 5W30 synthetic oil it will not be saving you that much over the Syncromesh.

syncromesh all the way............have had a 85 5 speed since new, put syncromesh in last year, NEVER shifted better..............

The good stuff (synthetic synchromesh):

what about royal purple?