When I first got my car it was low on tranny fluid, so when I went to buy some, the guy at the shop didn't have III, only IV, and I should use IV because it was newer and a better fluid... Is this true? What damage can be done... do they mix? ------------------ 1985 Camaro SC - 2.8L, auto. C'mon, spin 'em for papa... http://www.xenodrgn.f2s.com/Frontright.jpg

Sorry, I ment Dextron II and Dextron III

Dextron III is compatible with and an acceptable substitute for Dextron II.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. 2-1/2" cat-back, ZZ3 intake, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 CC system w/'87 LB9 block, ZZ3 cam, ported World 305 heads, Hooker 2055 headers, 3" Catco cat & 3" catback, restalled TC, Spohn SFCs).
57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Holley 750VS w/4150 conversion, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 600 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).

Arrgh! There's no T in Dexron. Look at the label on the bottle. It's Dexron!!

III is just the next step up from II. They're all backward compatible. Type F is also compatible with dexron but I wouldn't personally recommend mixing it.

It's the same as engine oil. Look on the dipstick of an older car. Requires SD grade oil. Or something lower. Current oil is somewhere around SF, SG or SH and maybe higher, I haven't looked. The newer oil is just better blends and will work fine in cars requiring older blends.

Dexron II hasn't been made in over 10 years now. It's all Dexron III. I haven't seen IV yet but I'm sure it'll come out eventually.

[This message has been edited by Stephen 87 IROC (edited October 16, 2001).]

Thanks Steve, just making sure... thats what I thought, I just didn't want to get caught with my pants down on an odd situation...

I agree with Steven except for the part about Type F oil. Don't use it under any circumstances.

LOL I was thinking the same thing. I work as second job at Autozone and there are guys who have worked there for 10 years that don't know how to say it!

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91 TA 5.7 TPI Automatic.
w/WS6 and 3.23 rear.
K&N Air Filter,Hypertech Coil,Moroso Blue Max Wires, Bosch Platinum plugs gapped at .050,
JET fan switch,JET air foil,Dual cats with Flowmaster 3" exhaust (Headers coming soon),GM Performance PROM, Complete PST components on front suspension, Spohn LCAs/Panhard bar.
My car only uses Mobil 1 transmission fluid, oil, and differential fluid.

That's what I get for being the world's second worst speller and just copying what someone else writes...

[This message has been edited by five7kid (edited October 17, 2001).]

So, how DO you say it?

I was just at Advance auto this week looking for tranny fluid and I saw a Dexron V. They musta skipped right over IV and went to V because I've never seen IV either.

Dave M
88 GTA

Dexron v is the new wonder fluid from GM. Interestingly there is a company that sells a bottle of stuff you add to dex3 and it is "converted" in dexV(a highly stable, friction modified fluid blah blah blah)

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82 z28 350cid, vortec heads, comp 262h cam, Holley 600cfm carb, 2in twice pipes, MSD ignition, turbo 350 trans, 3.73 posi, manly b&m megashifter

DEKS - RON. LOL, you guys crack me up.

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1990 IROC 350
Mods: Too busy trying to make it run right to mod it.
Airfoil, Dynomax cat-back, MSD coil, 180 t-stat, Bald Eagle tires,
Hypertech fan switch, Accel 23# injectors, Holley module, ported plenum,
Ported Daytona Yellow stock base, Moroso valve covers, other stuff,
Streetdampr, Ruger P95DC, hot wife, new oil filter, !cats, !TBC, !AIR.
18.0 @ 85MPH since I'm one big-a$$ MF
"It's better to have and not need than to need and not have."