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05-01-2012, 06:07 PM | #1 |
Registered User
Join Date: Jul 2011
Location: Durango,co
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Changing auto transmission oil on 72?
what type of oil should i use for my Th350 automatic transmission 4x4? Does Dex/merc work or just Dexron atf, any opinions, thanks
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05-01-2012, 08:49 PM | #2 |
Rollin in my K5 toaster
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Re: Changing auto transmission oil on 72?
Buy the cheep one
Dexron is for GM and Dex/Merc is for GM and Ford |
05-02-2012, 01:15 PM | #3 |
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Re: Changing auto transmission oil on 72?
So it doesn't matter either oil works right? Thanks
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05-02-2012, 04:16 PM | #4 |
Restoration Virgin!
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Re: Changing auto transmission oil on 72?
and welcome to the boards slammed....I found this thread that discusses your exact question....hope it helps ya...
http://67-72chevytrucks.com/vboard/s...d.php?t=520209
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Geoff with a G 1968 Chevy C10 SWB The Mistress 1972 Custom Deluxe C20 Suburban A Suburban Named Isabella 1966 Ford Mustang Mama's High School Graduation Present |
05-02-2012, 05:30 PM | #5 | ||
"I ain't nobody, dork."
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Re: Changing auto transmission oil on 72?
Get the cheap auto parts store brand Dexron. The new Dexron is compatible with old transmissions.
Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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05-02-2012, 09:35 PM | #6 | |
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Join Date: May 2009
Location: Fort Worth, TX
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Re: Changing auto transmission oil on 72?
Quote:
Cheap Aftermarket Dexron III "type" fluids are labeled DEX/MERC, And are NOT approved by any OEM. These fluids do work, BUT they are not tested to any standard, No viscosity or oxidation stability test. You have to trust a "bargain basement" fluid maker for their word. Stay away from Dexron VI ATF, It has caused seal damage/hardening in some transmissions that were made before 2006, GM says its backward compatible, But they are not fixing any seal damage. The ONLY Dexron III fluids to have a OEM licence are TES 295Fluids approved by Allison. TES 295 Approved Automatic Transmission Fluids. Castrol/Allison........................TranSynd BP Lubricants.........................Autran Syn 295 Cognis Corporation..................Emgard 2805 International..........................Fleetrite Synthetic ATF ExxonMobil.............................Mobil Delvac Synthetic ATF John Deere & Company.............HD SynTran Volvo Trucks North America.......Bulldog Synthetic ATF |
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05-02-2012, 10:55 PM | #7 |
*** That's interesting ***
Join Date: Oct 2008
Location: Pittsburgh, PA
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Re: Changing auto transmission oil on 72?
Is Dexron VI the new fancy synthetic stuff? Because I was told by a local shop to use the new synthetic stuff in my freshly rebuilt 4L80E (production date circa 1994, but rebuilt in 2010) on the initial fill. I already had plenty of stock of Dexron III in my garage, so I used that instead. It didn't feel right using an untried (by me) fluid in an older style trans that I just spent $$$$ to rebuild. I knew III would work, so I used it. I've also read that the synthetic stuff is great to run in any trans. Now I'm worried about what you are saying. Luckily I wasn't a guinea pig...
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Tom Chevy by day... 1969 Chevy C30 Rollback Tow Truck -- 383 stroker, 4L80E 2011 Chevy Caprice PPV 9C3 6.0L 1995 Chevy Caprice 9C1 1994 Chevy Caprice 9C1 #3 1995 Chevy Caprice Wagon #2 1995 Chevy Impala SS Mopar by night... 1969 Dodge Charger 1972 Chrysler Newport 2dr Hardtop (27K miles) Plus others... |
05-02-2012, 11:45 PM | #8 | |
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Re: Changing auto transmission oil on 72?
Quote:
It has a special additive package to deal with "clutch to clutch shifting". It is labeled a synthetic.....DEXRON-VI is not synthetic. It is made from a blend of Group II and Group III base oils plus the Dexron VI additives package. It does not contain any PAO (polyalphaolefin) found in group IV base oils. A "true synthetic" uses Group IV base oils. All TES-295 approved fluids use Group IV base oils plus a Dexron III additive package...Making them a Fully Synthetic Dexron III fluid. |
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05-03-2012, 09:50 AM | #9 | ||
"I ain't nobody, dork."
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Location: Whidbey Island, Washington
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Re: Changing auto transmission oil on 72?
Good info clinebarger!
Gary
__________________
'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
Quote:
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05-03-2012, 12:37 PM | #10 |
Restoration Virgin!
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Location: Huntersville, NC
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Re: Changing auto transmission oil on 72?
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Geoff with a G 1968 Chevy C10 SWB The Mistress 1972 Custom Deluxe C20 Suburban A Suburban Named Isabella 1966 Ford Mustang Mama's High School Graduation Present |
05-03-2012, 02:09 PM | #11 | |
*** That's interesting ***
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Location: Pittsburgh, PA
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Re: Changing auto transmission oil on 72?
Great info indeed.
But OK, I can be dense sometimes........ so bear with me. This (link below) is what my trans shop recommended for my 4L80E. I did NOT use this. Instead I used a supply of Dexron-III that I had laying around. http://www.wolfshead.com/specsheets/trans.pdf Quote:
Interestingly, the new fad is to indeed switch to using this "synthetic" Dexron-VI...everybody is praising it on other forums for how much longer it's "service life" is. Basically, it's all hype then and should not be used in older transmissions? I want to get to the bottom of this debate. I'm all for not following the fads if I'm going to damage an older transmission...........
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Tom Chevy by day... 1969 Chevy C30 Rollback Tow Truck -- 383 stroker, 4L80E 2011 Chevy Caprice PPV 9C3 6.0L 1995 Chevy Caprice 9C1 1994 Chevy Caprice 9C1 #3 1995 Chevy Caprice Wagon #2 1995 Chevy Impala SS Mopar by night... 1969 Dodge Charger 1972 Chrysler Newport 2dr Hardtop (27K miles) Plus others... Last edited by storm9c1; 05-03-2012 at 02:21 PM. |
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05-04-2012, 12:35 AM | #12 | |
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Join Date: May 2009
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Re: Changing auto transmission oil on 72?
Quote:
GM would never admit to screwing up! Not that Dexron VI is a bad fluid....Its just not 100% backward compatible. The double "service life" claim is B.S......Most ATF's that claim the be full synthetics use ONLY group III base oils.....Mobil 1 ATF is a good example. If you consider group III base oils "synthetic" Dexron VI is at best a synthetic blend????? |
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05-05-2012, 12:42 PM | #13 |
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Location: Durango,co
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Re: Changing auto transmission oil on 72?
Thanks for the information fellow chevy heads
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05-05-2012, 08:14 PM | #14 | |
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Re: Changing auto transmission oil on 72?
Quote:
Last edited by Weasel Diesel; 05-05-2012 at 08:21 PM. |
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05-05-2012, 08:56 PM | #15 | |
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Join Date: May 2009
Location: Fort Worth, TX
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Re: Changing auto transmission oil on 72?
Quote:
http://www.allisontransmission.com/d...duct/1099B.pdf |
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05-05-2012, 11:55 PM | #16 |
*** That's interesting ***
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Location: Pittsburgh, PA
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Re: Changing auto transmission oil on 72?
This forum is great. Thanks Cline. Great info. My instincts were right not to trust what I read but rather trust other people's experience. I'll just leave the Dexron III in there and change it every 30K miles or 5 years then. Forget the expensive VI on my older stuff. I'll just put the VI in my Caprice PPV (6L80E) when that service interval comes due.
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Tom Chevy by day... 1969 Chevy C30 Rollback Tow Truck -- 383 stroker, 4L80E 2011 Chevy Caprice PPV 9C3 6.0L 1995 Chevy Caprice 9C1 1994 Chevy Caprice 9C1 #3 1995 Chevy Caprice Wagon #2 1995 Chevy Impala SS Mopar by night... 1969 Dodge Charger 1972 Chrysler Newport 2dr Hardtop (27K miles) Plus others... |
05-06-2012, 10:14 PM | #17 |
Waiting for Paul to Open Safe
Join Date: May 2005
Location: Everett, WA
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Re: Changing auto transmission oil on 72?
Thanks for the great info clinebarger, it's now a part of the FAQ's here : http://67-72chevytrucks.com/vboard/s...d.php?t=523334
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