Can Diamond ATF SP IIII be used for.......

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 Originally Posted By: LubeTechBob
Well I have a 1991 DSM which is a Plymouth Laser/Mitsubishi Eclipse/Eagle Talon, I own the Laser but all were built by Mitsubishi!
Oh, I see. As someone else said, if it calls for ATF, I'd imagine that you're good to go.
 
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I am using chrysler atf+4 in both my trany and PS on my mitsubishi made chrsyler products that require diamond star-III
 
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If you take your chrysler or dodge mitsubishi made cars in for service, they only use the atf+4 not the diamond star. I buy the walmart brand atf+4. It's ablut half the price of the mopar stuff.
 
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Mine calls for Dexron III in the power steering system, but I am not sure about newer applications. Will check and get back.
 
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Mitsubishi vehicles require Dexron III in their power steering. SP III is only specified for A/T units.
 

LubeTechBob

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My Plymouth Laser O/M calls for ATF +3 or Dexron II or III, but I thought since it was made by Mitsubishi, that the Mitsubishi Eclipse version would call for Diamond ATF SP III instead. Have never seen a Mitsubishi Eclipse O/M to check if this a fact or not. Please advise.
 
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It gets confusing these days with transmission fluid and power steering fluid both being sold separately. Then you have the many different alternatives listed in the owner's manual. Personally I would go with Dexron III.
 
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I do know that from 2003 and up they use Mitsubishi spIII I am unsure of anything older. I did a little goodle searching and older Mitsubishi made cars do use dexron in the ps system. I would use whatever is in the owners manual. For my two mitsubishi made sebring coupes (03 and 04) the owners manual says diamnond star atf. Thus I have been using the chrysler atf+4 as the dealer would use.
 
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To save money! Transmission requires the HFM'd ATF. The PSF doesn't and uses a cheaper fluid. Automakers don't make sense since many decisions are made by accountants. I don't use SPIII in transmissions requiring it. I wouldn't bother using it as the PSF. If your PS requires DexIII, then a good full synthetic DexIII equivalent ATF should be used.
 
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 Originally Posted By: LubeTechBob
Why Would the P/S system use one type of fluid, and the transmission use another? Using the same fluid for both systems would make more sense?
Because the P/S system may use different materials than the transmission, and some materials in their P/S system may not be compatible with the ATF required for the transmission.
 
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