Code PO1870

[Jrs3800]

Wow... You are right, I hadn't even noticed that... V+1 is 6...

That is kind of confusing, and as it was said... What happened to 4 & 5....LOL

[HotZ28]

The last time I checked, IV means 4. V means 5 & VI means 6, so I have to wonder if Wally World is using some typical “Goober” associates to label these containers, or are they really selling full synthetic for 3-bucks a qt? I put Mobil-1 full synthetic in my Z28 several years ago, after installing a highly modified 4L60 with a PI 3200 stall (Vigilante) in it. Back then, Mobil-1 cost $7.50 qt.! IIRC, Mobil-1 trans fluid is colorless & odorless (clear as water).

The quote below from the Mobil WebSite;

Applications:

Mobil 1 Synthetic ATF is formulated for use in most North American, European and Asian vehicles.

Approved for Allison C-4 applications
Exceeds JASO 1-A performance standard

Mobil 1 Synthetic ATF is also suitable for use in vehicles that specify the following fluid requirements:

Audi G 052 025-A2, G 052 162-A1
BMW LA2634
Esso LT 71141
ETL-7045E, ETL-8072B, N402
Ford* MERCON*, MERCON V, MERCON LV
All 2005 and earlier GM vehicles**
Honda ATF-Z1*
Hyundai SP-II, SP-III
Idemitsu K17
JWS 3309
Kia SP-II, SP-III
MAN 339F, V1, V2, Z1, Z2, Z3
Mazda ATF-III, ATF-MV
Mercedes-Benz 236.1, 236.2, 236.5, 236.6, 236.7, 236.9
Mitsubishi Diamond SP-II, SP-III
Nissan Matic-D, Matic-J, Matic-K
Subaru ATF
Toyota T-III, T-IV
Voith 55.6335.XX (G607, G1363),
Volvo 97340
ZF TE-ML 03D, 04D, 09, 14A, 14B, 16L, 17C

*Not recommend for CVT applications, Mercon® SP, Ford Type F** Mobil DEXRON-VI ATF is recommended for 2006 and newer GM vehicles and improved performance in 2005 and earlier vehicles, wherever DEXRON is specified.

[BNaylor]

The Walmart Supertech Dexron VI is not mis-labeled and it says meets the requirements of transmissions calliing for Dexron VI and meets the GM Dexron VI specification. It is the real deal but at a cheaper cost. It is a synthetic blend and not a full synthetic. Made from base stocks and advanced additive technology. See link below which shows Mobil's version of Dexron VI. You need glasses Shep or are you hard of hearing?

Click here

Originally Posted by maxwedge

They can be used on older cars from 2006 down I believe, yes VI is 6, synthetic. VI can be retrofiited to all the previous years.

Originally Posted by BNaylor

Actually Dexron VI is supposed to be a synthetic blend ATF. I've used it very successfully on '98 and up GM cars with the 4T65E and HD version autotransaxles. I no longer use the old Dexron III.

[chief153]

Originally Posted by BNaylor

The Walmart Supertech Dexron VI is not mis-labeled and it says meets the requirements of transmissions calliing for Dexron VI and meets the GM Dexron VI specification. It is the real deal but at a cheaper cost. It is a synthetic blend and not a full synthetic. Made from base stocks and advanced additive technology. See link below which shows Mobil's version of Dexron VI. You need glasses Shep or are you hard of hearing?

Click here

Update on PO1870 code and change over from Dextron III to Dextron VI.
I now have 325 miles on the Dextron VI fluid change over and so far, no problems. The color and smell of the fluid is the same as new, and the shifts are so much better, but this could be because of the lubegard I added along with the fluid change. I had the "fishbite" problem before the fluid chage, but now that has disappeared. I will update at 500 miles.

[BNaylor]

IMO no. It is the Dex VI. This is the most common result when people switch over to Dex VI from Dex III. I did not use any Lubegard additive in any of the GM cars I did the switch and the shifting is very smooth. On mainly the 2-3 and 3-4 upshifts you can barely tell and have to watch the tach. Keep us posted and good luck!

[BNaylor]

Mixing of Dexron VI and Dexron III. Any comments?

Supposedly the two fluids are compatible. Obviously you won't get all the old Dexron III out when doing a pan drop service or a fluid exchange service when switching over to Dex VI. But there seems to be misinformed people on the Net that think the two can be mixed as a matter of routine maintenance like top off situations when the ATF is low and other situations. I read that people with Dexron III equipped autotransaxles are using Dexron VI to top off their trannies or mixing them in greater quantities. Doesn't this defeat the purpose? The classic comment is the container says it is OK to mix the two.

[chief153]

Originally Posted by BNaylor

Mixing of Dexron VI and Dexron III. Any comments?

Supposedly the two fluids are compatible. Obviously you won't get all the old Dexron III out when doing a pan drop service or a fluid exchange service when switching over to Dex VI. But there seems to be misinformed people on the Net that think the two can be mixed as a matter of routine maintenance like top off situations when the ATF is low and other situations. I read that people with Dexron III equipped autotransaxles are using Dexron VI to top off their trannies or mixing them in greater quantities. Doesn't this defeat the purpose? The classic comment is the container says it is OK to mix the two.

I agree with you BNaylor, mixing the two together would appear to defeat the purpose. I think my transaxle still had nearly 4 quarts of Dextron III in the converter, I hated leaving that much inside, but had no way of getting it out. To date I have almost 500 miles on the change over and still no problems or CEL. Tuesday I have to make a 450 mile trip back to work, if the CEL is going to come back on it should on that trip as it will be interstate travel (75-80mph).
BNaylor, i just bought a software/hardware product that enables me to hook my laptop to the DTC on any OBDII compliant vehicle, the information pulled from the ECM is remarkable. Where should I post a thread explaining how valuable this tool is for troubleshooting? BTW, this tool showed my trans to be running at 170 degrees at 65mph, much cooler that with the Dextron III.

[BNaylor]

Probably less than that in the torque convertor. Maybe 2 qts. Rest is in the radiator, pressure/return lines, etc. Some of us added a pan drain plug to do a subsequent drain and another resupply with Dex VI. Also, if you remove the 1-2, 2-3 shift accumulator and open it up you can get about another quart out.

Glad it is working out for you so far.

Good investment on the odb-ii program. It will pay for itself. I use Autotap with a Dell laptop and a Powertuner since I mod GM cars with the 3800 engine.

Feel free to post at our Buick Tips & Maintenance forum.

Good observation on the cooler tranny operating temperature. I noticed that too.

[Blue Bowtie]

To me, the whole concept of "synthetic blend" defeats the purpose. Why not use pure synthetic base and the appropriate additive package to achieve the desired result? I've got M1 in two of my 4L60s and a TH700-R4 with a buttload of miles and haven't so much as looked a a mounting bolt, just regular service. One of them pushes a 4,600 pound barge to 13.6 in the ¼ mile, so it isn't like it gets babied.

[BNaylor]

Originally Posted by Blue Bowtie

To me, the whole concept of "synthetic blend" defeats the purpose. Why not use pure synthetic base and the appropriate additive package to achieve the desired result? I've got M1 in two of my 4L60s and a TH700-R4 with a buttload of miles and haven't so much as looked a a mounting bolt, just regular service. One of them pushes a 4,600 pound barge to 13.6 in the ¼ mile, so it isn't like it gets babied.

I don't know abut that Jeff. I tried M1 in my GTP which is not exactly a barge around 4 years ago but with the moderate mods pushes it to high 12s in the 1/4. Check out my timeslip. I was getting slippage and my ET went to pot. Hard to dial in for ET bracket racing. Dumped the M1 and back to the Dex III and no issues since. I do not use Dex VI in my GTP but I have converted several other daily driver GM cars to include my wife's L36 '99 Regal LS and my '01 L67 Regal GS to Dex VI. However, keep mind these are all with the 4T65E and 4T65E-HD autotransaxles in which you do not want to take any chances.

[chief153]

Originally Posted by BNaylor

Probably less than that in the torque convertor. Maybe 2 qts. Rest is in the radiator, pressure/return lines, etc. Some of us added a pan drain plug to do a subsequent drain and another resupply with Dex VI. Also, if you remove the 1-2, 2-3 shift accumulator and open it up you can get about another quart out.

Glad it is working out for you so far.

Good investment on the odb-ii program. It will pay for itself. I use Autotap with a Dell laptop and a Powertuner since I mod GM cars with the 3800 engine.

Feel free to post at our Buick Tips & Maintenance forum.

Good observation on the cooler tranny operating temperature. I noticed that too.

AutoTap is what I bought, too.

[BNaylor]

Originally Posted by chief645

AutoTap is what I bought, too.

Excellent! What do you think of the virtual gauge display? My primary virtual gauges are air/fuel mixture and knock retard (KR) because my GTP is supercharged with boost mods.

[chief153]

Originally Posted by BNaylor

Excellent! What do you think of the virtual gauge display? My primary virtual gauges are air/fuel mixture and knock retard (KR) because my GTP is supercharged with boost mods.

I am having a ball with this tool. I`ll drive a few miles then stop and change gauges to check other areas of my auto. I had to change the speedometer cluster last year, AutoTap caught this and showed me how many miles were actually on the vehicle. I plan to go ahead and buy the enhanced parameter software so I can dig deeper into the ECU. The virtual gauge display is great, my ole laptop is really coming in handy now.

[chief153]

I wanted to post an update on the PO1870 code I mentioned earlier. I now have 3,200 miles on the car after converting over to Dextron VI trans fluid. The transaxle is shifting great and best of all no trouble codes have popped up pertaining to trans/converter problems.
My advice to new members--listen to the moderators on here, they know what they are talking about.