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Royal Purple Synchromax Synthetic Tranny Oil

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Royal Purple Synchromax Synthetic Tranny Oil

 
Old 09-29-2014, 09:05 PM
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Default Royal Purple Synchromax Synthetic Tranny Oil

Just replaced the tranny oil in my '07 with this oil. Really like the positive feel. Anyone else use this tranny fluid? What is the length of time between changes?

http://www.amazon.com/Royal-Purple-S...smission+fluid


Anyone try Royal Purple Max 75W-90 in the rear end (the car's rear end. LOL!!!)

http://www.amazon.com/Royal-Purple-P...gear+oil+75w90


Thanks!
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Old 09-30-2014, 12:46 AM
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I've got the royal purple 75w 140 in my diff and its a bit smoother than the valvoline one I had before of the same weight.
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Old 09-30-2014, 01:15 AM
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Originally Posted by iamatlas View Post
I've got the royal purple 75w 140 in my diff and its a bit smoother than the valvoline one I had before of the same weight.

Much thanks! Gonna do this, once I get a 23mm boxed spanner wrench. The RP Synchromax seems to give the tranny a much more positive engagement feel. Finding gears while downshifting is easier. Bet their diff gear lubricant is good, too. Does RP have as good life expectancy, as say Mobil One 75W-90 gear oil?


Thanks, again!
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Old 10-24-2018, 11:32 AM
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Windhund116 - are you still using the royal purple synchromax in your transmission? Happy?
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Old 10-24-2018, 03:23 PM
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Yes. Synchomax. I still like the positive feel of the syncho's engaging gears. Going into reverse in very smooth --- with this fluid and my 2007 S2K.

Went to Mobil 1, in the diff (75W-140), two years ago. In terms of sediments on the magnetic plug... about the same between the Royal Purple and Mobil One.

Last edited by windhund116; 10-24-2018 at 03:26 PM.
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Old 10-24-2018, 04:09 PM
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I switched the tranny from Honda to Amsoil. I have been pretty happy with it especially when it warms up. Just because I like to, I change the diff and the tranny every spring. I use Mobil 1 75w-90 at first because it met all the specs and then because of Billman's comments.
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Old 10-24-2018, 04:13 PM
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Originally Posted by cosmomiller View Post
I switched the tranny from Honda to Amsoil. I have been pretty happy with it especially when it warms up. Just because I like to, I change the diff and the tranny every spring. I use Mobil 1 75w-90 at first because it met all the specs and then because of Billman's comments.
I just changed my dif fluid after 20K miles. The drain plug had almost zero sludge and old fluid still looked good. Guess I'll stick with Amsoil 75W110.
I'll try the RP in the gearbox next time. I have Amsoil in it now - so next season I'll give RP a try.
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Old 10-25-2018, 06:04 AM
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I'm running Royal Purple Syncromax in the gearbox this season. The tall, thin bottle shape makes it difficult for my lil' hand pump to get it in. Box shifts fine as it did with Honda MTF. I have no idea what the original owner had in the gearbox and I suspect it was never changed during the 35,000 miles he owned the car. I put Honda MTF in it within months of acquiring the car and the car seemed to shift smoother but that was four years ago.

Old formula LE1605 gear oil (GL5 spec) has been in the differential the past four years (changed every two years) but will come out on schedule next month. (New forumula LE1605 is no longer GL5).

-- Chuck
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Old 10-25-2018, 06:26 AM
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I replaced the MTF in my 2wd Tacoma last year or so and was a little surprised the book called for gear oil, not MTF of any kind. Oh well.
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Old 10-26-2018, 02:52 AM
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Originally Posted by windhund116 View Post
Yes. Synchomax. I still like the positive feel of the syncho's engaging gears. Going into reverse in very smooth --- with this fluid and my 2007 S2K.

Went to Mobil 1, in the diff (75W-140), two years ago. In terms of sediments on the magnetic plug... about the same between the Royal Purple and Mobil One.
have you tried honda mtf before the RP? Can you tell how the gearbox shifts with RP when cold? I mean outside temps of below 10 Celsius (dont know wherr you live). Honda mtf gets very stiff on cold temps. Thanks
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