SkipBurney
Full Access Member
What type of oil goes in a 5 speed transmission, is it 90 w grease or the lighter synthetic stuff that goes in the newer transmissions. Also where do you check it at. 1990 F-250 5 speed 7.3
Transmission grease
- Thread starter SkipBurney
- Start date
nyteshades
Full Access Member
ATF
SkipBurney
Full Access Member
isn`t there a yellow metal lubricant in the trans lubes to protect the synchros that is not in ATF
nyteshades
Full Access Member
Maybe in the older manuals, but the zf's were designed to run on ATF.
SkipBurney
Full Access Member
is there a plug on the side to check the fill level
Fordsandguns
Fords Rule
There is a fill plug up on the drivers side, just fill it till you have it running back out, then quickly put the plug back in. you can jack up the drivers side, it helps get a little more in.
alienturtle
Human
SkipBurney
Full Access Member
I have a gallon of Pennzoil Synchromesh on the shelf I had for one of my Chevrolet transmissions do yall think it will work on the Fords too.
diesel4me2
Camping is more importanter!
if it has the same additives for the syncros that royal purple syncromesh has, i would not use it. i put that crap in my transmission before my last trip and my trans temps were well over 330 degrees. dumped it when we got to the campground and put in atf. during the trip home my trans temps were over 100 degrees cooler. i will not put anything but atf in my 5speed from here on out.
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typ4
Full Access Member
NO!
SkipBurney
Full Access Member
Thats why I love this forum. Does anyone have a brand of ATF that is good to use.
typ4
Full Access Member
I like synthetic. any brand.
Diesel_brad
Dunce
Any Synthetic is good. Castrol is what came in it from the Factory.
you can also look into Redline MTL that is what is in my 5 ZF5s
RustyBolts
Full Access Member
The Castrol Synthetic is TranSynd, correct? My V10 has Castrol GTX 5w30 in the crankcase, and Castrol 75w140 Synthetic Gear oil in the diff. Might as well put Castrol in the trans as well.
