OneTon, do you have any issues with shifting when it’s cold outside?
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OneTon, do you have any issues with shifting when it’s cold outside?
IGOTACUMMINS thanked for this post
Shell Spirax S2 G 140 or their S2 80w-90.
They are GL-4 and state for synchromesh gears and light pressure.
A list of Mercedes-approved fluids is where the Spirax came from.
IGOTACUMMINS thanked for this post
When I ran Amsoil MTG 75W-90, I had no issues with cold shifting.Originally Posted by siouls
I swapped to Hotshots secret G56 fluid over the summer.
No cold shifting issues with this, either.
2015 Ram 3500 CCSB SRW 4x4 G56
2020 Ram 2500 CCSB 4x4 68RFE
Never ending project. Always adding something...
IGOTACUMMINS thanked for this post
Royal Purple Synchromax.
I have been using it in my manual transmissions for over a decade.
No cold shift problems.
Transmission is quiet and smooth.
I also put in the +1 quart over recommended.
-Muzzy
2008 Megacab 4x4 G56 Trans - All mods lost in boating accident - EFI Live by Muzzy, 2nd gen S467.7/83/1.0, Banks Monster Ram, 5" Exhaust, Grid Heater Delete, Rail Plug, BD Flowmax LP, SB Clutch, Fuel Sump -8AN line, Bilstein 5100s, Cali Track Bar, Dynatec B-joints, Level Springs, 1" Lift Shackles Rear, Royal Purple Lubricants...there is probably more that I forgot.
I used oil slightly thinner than 75-90.
I went with mobile 50W trans fluid; being in new England i did notice a bit of slow shifting, maybe the first 5 mins of driving, but other than that, zero complaints.
My friend used 75-90, which was too stiff when cold, so I went with a slightly thinner oil.
Nor is that thicker is worse; II just found a happy medium.
One of many G56 fluids per MB 235.1 list.
https://www.ravenol.de/storage/app/m...1223101_en.pdf
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