What are the first “must-do’s” for a new owner?
#16
CF Veteran
Join Date: Dec 2017
Posts: 4,043
Received 1,120 Likes
on
899 Posts
Year: 1989
Model: Comanche (MJ)
Engine: 4.0
The FSM is wrong. It originally said GL-3. GL-5 has more extreme pressure (EP) additives which are usually sulfur based that erode the brass synchros over time. You actually need some friction for the synchros to work properly and the EP additives interfere with that. 75W-90 gear oil is pretty close to 10W-30 motor oil viscosity-wise, and actually thins out less with temperature. When I had an AX-15, I ran MTL90 which does not use sulfurs and is consider "yellow-metal" safe. I used NAPA GL4 right after I rebuilt it, planning to change it after break-in. It shifted so bad I thought I buggered the rebuild, but decided to put the MTL90 in anyway. It was like night and day, and the MTL shifted fantastic. I've never run 10W-30, but there are a lot of guys on here who swear by Mobil1 10W-30 and supposedly some of the Toyota trucks that used the AX-15 spec 10w-30.
#17
Banned
Thread Starter
The FSM is wrong. It originally said GL-3. GL-5 has more extreme pressure (EP) additives which are usually sulfur based that erode the brass synchros over time. You actually need some friction for the synchros to work properly and the EP additives interfere with that. 75W-90 gear oil is pretty close to 10W-30 motor oil viscosity-wise, and actually thins out less with temperature. When I had an AX-15, I ran MTL90 which does not use sulfurs and is consider "yellow-metal" safe. I used NAPA GL4 right after I rebuilt it, planning to change it after break-in. It shifted so bad I thought I buggered the rebuild, but decided to put the MTL90 in anyway. It was like night and day, and the MTL shifted fantastic. I've never run 10W-30, but there are a lot of guys on here who swear by Mobil1 10W-30 and supposedly some of the Toyota trucks that used the AX-15 spec 10w-30.
would you stay away from that?
#19
Seasoned Member
I’ve sprayed several vehicles with Fluid Film and Woolwax and I personally like Woolwax Black the best. Seems to hold up better in my opinion as it is thicker than Fluid Film. Use a heat gun to warm up the can contents before pouring it into the sprayer they sell with the kits.
IIRC, FF and WW are owned by the same company…
IIRC, FF and WW are owned by the same company…
#20
Banned
Thread Starter
#22
Newbie
I saw a bunch of videos on Surface Shield being the newer and better Fluid Film. Made by the PB Blaster company. I sprayed it on a couple of weeks ago, very sticky so little dripping and virtually no odor but use a face shield and a mask anyway. Took about 2 hours to do a pretty thorough job. Figure 4 to 5 of the aerosol cans. Available at your local Home Depot for ~$11 a can.
Thread
Thread Starter
Forum
Replies
Last Post
Jdean
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
8
06-24-2020 04:16 PM
Matthew Reed
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
3
06-11-2018 05:25 PM
rtbachus35
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
5
04-06-2018 01:59 PM
TheDok
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
12
02-21-2014 06:03 PM
ohno40
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
3
08-05-2013 02:33 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)