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| Transmission fuild | Login/Join |
DRR Trophy |
Was wondering about the Castrol TranSynnd 668 or Mobil Delvac 1 668 spec transmission fluid. Can you run this type of fluid in daily drivers tow rigs . I thinking of changing over my th400 race transmission to this fluid , Anything i should know before doing it. | ||
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| DRR Pro |
I run it in everything. | |||
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| DRR Pro |
Using low setting compressed air, blow out the trans cooler lines if possible. | |||
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DRR Trophy |
Hey Eric, There is another extensive, recent thread on this. Im thinking about switching, but havent had a real issue. https://drr.infopop.cc/eve/for...0760912/m/2427095107 Clark Doukas | |||
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| DRR Trophy |
Can I run the 668 fluid in any make of transmission? GM ,ford ,Dodge | |||
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DRR Sportsman |
yes, i have been putting that fluid in the new 8 and 10 speed transmissions at my transmission shop. MOst manufacturers are suggesting using a a ultra low viscosity fluid in those transmissions, but in turn, they run hotter and the converter shudders worse with the light weight fluid. The transynd has been taking care of alot of shudder issues. I also highly recommend this fluid in all powerglides and 400s with any power level from 500 to 2500. Jeremiah Hall | |||
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| DRR S/Pro |
I don't know but suspect it's the same reason they are running such low viscosity engine oil, government mileage mandates. My 6sp manual w/436hp uses automatic trans fluid!! I was too chicken to put in gear oil. Illegitimi non carborundum | |||
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| DRR Pro |
Have you use TES-295/ 668 in the ZF 8 speed transmissions used in BMW and Mopar? ZF sells their Lifeguard recommended fluid and Mopar offers their replacement specific fluid as well. | |||
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| DRR Sportsman |
That is one transmission fluid you do not change to a normal "red" fluid. We have had several come through that a customer had a quick change oil place service the transmission, and they put a generic bulk fluid back in it, and it ALWAYS leads to failures within 6 months. I know that clear trans fluids are 30+ a quart, but that is a fk around and find out deal, and i personally wouldnt fk around with that trans. Jeremiah Hall | |||
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| DRR S/Pro |
I have a question about TES 668. The transmission temperature in my motorhome (4L-80E) while towing runs much hotter than I am comfortable with, often reaching 250+ degrees. I installed two B&M stack plate coolers in addition to the original stock cooler located in the radiator, it changed nothing. Now I'm wondering if TES 668 fluid would reduce the temperature or at least allow it to cool off quicker. If you have any experience using TES 668 I would like to hear what it did for your tow vehicle. Bob | |||
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| DRR Sportsman |
That is definitely too hot, id be interested to see if its legit that hot. BUT, the TES 668 WILL help cool it down. Typcially the fluid runs 20 degrees cooler than most other fluids. Jeremiah Hall | |||
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| DRR Sportsman |
Also, i would quit using the radiator trans cooler, and only use your 2 stack plate coolers. The engine might be warming the transmission up too much. Jeremiah Hall | |||
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| DRR S/Pro |
Thanks for the suggestions, especially bi-passing the radiator cooling lines. I'm considering buying a Hughes RV converter, that would also solve the problem of draining the converter. Bob | |||
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| DRR Sportsman |
That is prolly a good idea. MOST of the time, the converter slipping in lock up is going to build the heat. Make sure to buy the nicest one Hughes has for that application. Jeremiah Hall | |||
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