What is a good synthetic Oil for my t56? How Much do I need to get? Does the t56 use the ATF like my old t5 did?

Whether it uses ATF, gear lube or motor oil, get AMSOIL. I got started with the stuff in '83 when my T-50 (yes, 5-speed behind a '77 Buick V6) kept missing the 1-2 shift. After the AMSOIL ATF, I never missed that shift again.

If gear lube, get the Series 2000 75W90. Great stuff.

Not sure on the capacity, but 2 quarts has taken care of any car manual tranny I've seen.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/LB9 block, ZZ3 cam and intake, WP 305 heads ported & polished, Hooker headers & y-pipe, 3" Catco cat).
57 Bel Air, my 1st car. 0.030 over 396, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, 3.08 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.

Amsoil it will be!

I think it uses atf Can anybody confirm this? Any body else know capacity?

Thanks

I'll show a little ignorance here. The book I have says "Corvette 6-speed, '97-up, 8 pts". "Corvette, '89-96, 4.4 pts". "Camaro 6-speed, '93-'97, 8.1 pts". Only goes to '97 models, hope yours is covered by one of those (not sure exactly which was a T-56). Guess it's been too long since I've seen manual trannies.

The '89-'96 Vette says gear lube, all the others say ATF.

I have heard nothing but horror stories from 4th gen owners using synthetic fluid in their T-56's. Use what the manual says

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91 Formula
305 TPI 5speed
1LE/G92/WS6

Paxton SN92 polished kit, SLP airfoil, ported/polished plenum, March pulleys, Crane AFPR(43psi),Crane Gold 1.6rrs,MSD coil,MSD6AL,MSD boost-master,Holley 9mm wires,Ac delco R43ts plugs,custom chip,Ford SVO 24# injectors,Bosch O2sensor, Bosch in-line pump(w/stock pump), SLP 1 5/8" headers,SLP catback,short shifter,3:73s w/Auburn posi,170* t-stat,JET 195* fan switch, Macewen white face gauges, Autometer gauges, Zoom hi-performance clutch.

i use mobil 1. if 5.7 kid starts giving me free samples of amsoil then i'll send every one his way

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ICON Motorsports

1st & 3rd

What kind of Horror stories. I thought synthetic would make it shift smoother?

I've never heard of any such thing. Are they trying to use gear lube instead of ATF, or something like that?

A couple of points:

1) The manual will give a type and spec. If the lube you are using is of the right type and meets the spec, you can use it.

2) If a manufacturer says you can only use their product, they are required by law to provide it free of charge.

I'd be interested to know exactly what these "horror stories" are.