Author Topic: Synthetic tranny+t-case fluids?  (Read 2838 times)

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awhotrods

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Synthetic tranny+t-case fluids?
« on: Mar 08, 2005, 02:17:20 PM »
Does anyone run or reccomend running a red line or royal purple synthetic GL5 in their tranny's or t-cases?  I want to put "the good stuff" in there.  Thanks

BigMike

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Re: Synthetic tranny+t-case fluids?
« Reply #1 on: Mar 08, 2005, 07:57:36 PM »
Use either Schaeffer's Synthetic Gear oil (http://www.schaefferoil.com/) or Red Line.

You can run Syn in a t/case regardless of its age, but if your transmission is under 2,000 miles old, then I would recommend using mineral oil until the syncros have seated properly.

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BigMike
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awhotrods [OP]

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Re: Synthetic tranny+t-case fluids?
« Reply #2 on: Mar 09, 2005, 11:36:39 AM »
Use either Schaeffer's Synthetic Gear oil (http://www.schaefferoil.com/) or Red Line.

You can run Syn in a t/case regardless of its age, but if your transmission is under 2,000 miles old, then I would recommend using mineral oil until the syncros have seated properly.

Regards,
BigMike




Thanks Big Mike

Makohon

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Re: Synthetic tranny+t-case fluids?
« Reply #3 on: Mar 09, 2005, 06:23:48 PM »
awhotrods post some pics of that truck up!! i like i like!!!!! :wave:  :beerchug:
91 std cab, flatbed, 35 mtr's, aussie, 5.29's, 4.7's, twin sticks

awhotrods [OP]

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Re: Synthetic tranny+t-case fluids?
« Reply #4 on: Mar 12, 2005, 01:50:05 AM »
awhotrods post some pics of that truck up!! i like i like!!!!! :wave: :beerchug:

I would if I could figure out how to resize my pics, they're all too big!

Prismo

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Re: Synthetic tranny+t-case fluids?
« Reply #5 on: Mar 12, 2005, 01:56:08 AM »
I run the Redline MT90, it has worked well for me. Around 200k since Marlin rebuilt the tranny & cases. About time to do it again.
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awhotrods [OP]

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Re: Synthetic tranny+t-case fluids?
« Reply #6 on: Mar 12, 2005, 01:58:13 AM »
I run the Redline MT90, it has worked well for me. Around 200k since Marlin rebuilt the tranny & cases. About time to do it again.


Damn, thats pretty good!!  Is the MT90 a 80-90 type lube?

Prismo

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Re: Synthetic tranny+t-case fluids?
« Reply #7 on: Mar 12, 2005, 02:13:31 AM »
It is a 90wt manual transmission lube I believe.
It is 75-90
http://www.redlineoil.com/products_gearlubricants.asp?pvID=74&prodID=57&subcatID=18
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blackdiamond

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Re: Synthetic tranny+t-case fluids?
« Reply #8 on: Mar 29, 2005, 12:08:42 PM »
Has anyone had problems with transmissions and/or transfer cases leaking after switching to synthetic?  My transfer case is only a couple of years out of a Marlin 4.70 build so I am sure it is fine, but my transmission is old a tired.  I don't want to spend the money for the change and then have to go right back due to excessive leaks.  I don't think there is any leaking currently that I can tell.  My transmission shifts very rough (almost grinding gears) when down shifting into 2nd and up-shifting into 2nd and 3rd (when cold it is worse).  Do you think that switching to redline would help?  It got slightly worse when I installed the Marlin 1600 clutch, but I think it is mostly because it engages very near the floor and I am not in the habit of completely depressing the clutch.
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