Hello all again. well i am changing my tranny fluid and when i went to advanced auto i was kinda disturbed when i found out that not only does it use auto fluid but also only 1 1/2 Qt. is this right? it also told me to use dextron 2. well i dont know the diff between dex 1,2,3,4,5,6,7,---9999 and really didnt care. so i bought max life. it was the best they had.

oh yea its a 1986 2.8

The 4-speed is 5.9 pints. Dexron and 5-30 motor oil were the recommended fluids for the manual transmissions when the Fiero was built 25 years ago. Some years later, GM started recommending synchromesh transmission fluids as they became available. AC Delco, Penzoil, Quaker State, Texaco, AMSoil manufacturers all have their synchromesh fluids.

I'm surprised Advance Auto doesn't have any of these proper fluids.

http://www.5speedtransmissi...m/gm_syncromesh.html
http://www.stealth316.com/2...zoil-synchromesh.htm

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World of Wheels Winners
My 3.4L S/C 87 GT
& My SD4 Indy

[This message has been edited by fierosound (edited 05-09-2009).]

so the automatic fluid i bought is wrong then? thats what they told me to get

Taken from Ogres Fiero cave:

"DO NOT USE ANY AMOUNT OF ATF IN ANY MODEL YEAR. THE USE OF ATF MAY CAUSE GEAR CLASH AND RESULT IN SYNCHRONIZER DAMAGE. (Direct Quote, GM even put it all cap’s in the TSB.)"

As stated above, you should be using Syncromesh Fluid. There was a TSB a while back that stated to use Syncromesh in all Fiero Manual Transmissions.

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Red 86GT 4 Speed

When I was a kid back in the 60's, my neighbor was a stock car racer, and a consistent winner. He told me during one of our chats that you could put about anything you wanted in there if you added a couple pints of STP. STP has been in every straight trans I've ever owned, including my Fiero with synchromesh, and I've never lost one. And I'm 60. I once heard many years ago that all 33 cars starting the Indy 500 had STP in the gearboxes.

and I also sprinkle boron in mine... True story.

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--1984 3800 Turbo / 5speed
--12.1 @ 123mph

quote Originally posted by Ruffy: so the automatic fluid i bought is wrong then? thats what they told me to get

Take it back, get the right stuff - 2 quarts.

quote Originally posted by fierosound: I'm surprised Advance Auto doesn't have any of these proper fluids.

I was surprised to find that out, too. However, AutoZone sells the Pennzoil synchromesh oil.

I've run Mobil One 5w30 for the last 120,000 miles in the current 4 speed, 60,000 in the previous 4 speed before that car got hit by a Buick.

I've not experienced any problems.

quote Originally posted by olejoedad: I've run Mobil One 5w30 for the last 120,000 miles in the current 4 speed, 60,000 in the previous 4 speed before that car got hit by a Buick. I've not experienced any problems.

I ran Mobil 1 5-30 before too. I found Synchromesh is better, made shifting even smoother.

im glad to see so much help. however i couldnt find any of that syncromesh anywhere. i went to advanced auto, and wal mart. both said no they never carried it. but i will try to find it some where. also if theres any kinda help on some thing to add to it to make it shift smooth please tell.

quote Originally posted by fierosound: I ran Mobil 1 5-30 before too. I found Synchromesh is better, made shifting even smoother.

anyone know a cheap alternative to the "friction modified" syncromesh fluid that GM offers for manual trannies with LSD's?

Go to autozone for syncromesh. For some stupid reason advance doesn't carry it. I work at advance and half my managers somehow don't even know what it is.

quote Originally posted by kzelisko: Go to autozone for syncromesh. For some stupid reason advance doesn't carry it. I work at advance and half my managers somehow don't even know what it is.

It is SO annoying going to "Auto Stores" and deal with guys who don't know what they're doing. While I can forgive them for not knowing each nut and bolt and every quirk the Fiero has, they should have some knowledge about their general products like fluids. If they carry Pennzoil motor oil, all they have to do is look up Tranmission Syncromesh Oil/Fluid in their catalog.