Yes and no! The drain bolt is 15/16" and same for the fill plug. I suggest against any GL-5 oil. It has a compound that is known to eat yellow metals! Your synchronizes are yellow metal! Synchromesh is what I used and like it others have used 10w-30 synthetic. And I found it easier to remove the shifter and shifter boot to fill my trans. The fill plug is very hard to fill at and get a accurate level unless you have a pump of some sort. But only rakes about 4 qts depending on the trans.All you need to do a flush is a socket that fits the drain plug and fill plug (sorry I don't know the size) and drain it and then fill it back up. The level you fill it to is the height of the fill plug. You pump oil back into the transmission and when it starts to come out of the fill plug then it's full. That's it. Nothing to it. I used SAE 85w-140 GL5 Gear Lubricant. I don't know what is recommended but I used this oil because it's thicker and my transmission has over 200K on it and it still shifts very smooth. I just went with thick oil because it's suppose to keep gears a lot cooler. I also use it in my differentials.
x2 on fill strategy and synchromesh.Yes and no! The drain bolt is 15/16" and same for the fill plug. I suggest against any GL-5 oil. It has a compound that is known to eat yellow metals! Your synchronizes are yellow metal! Synchromesh is what I used and like it others have used 10w-30 synthetic. And I found it easier to remove the shifter and shifter boot to fill my trans. The fill plug is very hard to fill at and get a accurate level unless you have a pump of some sort. But only rakes about 4 qts depending on the trans.
This may be but I am one not to push the envelope. GL-5 is supposed to have a compound build up that breaks down yellow metals. Although I don't know first hand but I'm not willing to figure it out and spend $$$ on a tranny that I could have prevented by staying away from GL-5.Motors Specifications Guide specifies 75W-90 GL-5 @ 7 pints. My fill plug is a Torx socket amd my fill plug is 15/16
This is why I specifically went with RP. Non-corrosive to yellow metals.This may be but I am one not to push the envelope. GL-5 is supposed to have a compound build up that breaks down yellow metals. Although I don't know first hand but I'm not willing to figure it out and spend $$$ on a tranny that I could have prevented by staying away from GL-5.
X2 - no use in trying to outsmart the engineers!You would think that after all the money Jeep spent on designing these trannys they would recomend what they are designed to use.I dont have the R&D money required to second guess the manufacturer. I doubt any one here does.Your best bet is to stick with the fluid it is designed for.I have been an auto tech for nearly 40 years and that logic has NEVER failed me.