My tranny has a fill plug and my transfer case does too but....

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

Joined
Jun 26, 2017
Threads
39
Messages
147
Location
hanover, nh
I don't know which of this multitude of huge bolts is which....
can you help?

IMG_3820.webp
 
What you have there is a transfercase and a PTO winch.
They both share the same oil.
Photo attached showing drains for both. And fill for transfercase which flows into pto.
Park up on flat ground. Drain oil from both, put drains back in and fill in fill plug until it starts to over flow a small amount. Then they are both done.
You should goto the manual section of the forum and download a FSM for your truck. And it will show you how to do it. If in doubt take it to a service garage.
IMG_3820.webp
 
ahhh ok, that explains why it doesn't look like the transmission pics I've been pondering.
:bang:
thanks mate
so where is the transmission fill plug?
 
"You should goto the manual section of the forum and download a FSM for your truck. And it will show you how to do it. If in doubt take it to a service garage."


I don't find the 1986 bj74 service manual there unfortunately. I'll keep looking.

do i need to remove the skid plate to find the transmission fill plug?
 
You should goto the manual section of the forum and download a FSM for your truck. And it will show you how to do it. If in doubt take it to a service garage.
View attachment 1501046




I don't find the 1986 bj74 service manual there unfortunately. I'll keep looking.

do i need to remove the skid plate to find the transmission fill plug?
 
You can reach your hand and get to the plug for the trans. It's on the side of trans in the area of the Pto drive shaft. Its roughly in the middle/half way up in that area and the head of the bolt faces up slightly
 
I pulled the skid plate and I assume now that I have it.
see pics.

tran.webp
 
Always do the fill plug first. Oil will drain smoother and it'll allow you to check the oil level incase it was low.

For example: if transmission is low and transfercase is high you've got a seal that went.
 
Warm the oil up with a 10 min drive, you will get more of the old oil out faster.. I'm not sure how you will fill it up ,but I had a little hand pump that screwed onto the oil container. I fitted a enough garden hose so I could stand outside the vehicle and pump down hill.
Just keep an eye on the volume window on the container so you know when its nearly full.
I'm not sure if you know but the max amount of oil is level with the fill hole on level ground.
 
fill holes on my transmission and on my transfer case seem to be seized...
I have some lube soaking in right now, not sure what to do next.
 
let them soak overnight and use a breaker bar with a snipe. The only thing I could see you wrecking on removing the plug is stripping the plug itself.I would not use heat as theres a bunch of seals you don't want to bugger. If the plugs haven't been removed for a long time the oil likely baked on a bit creating a strong seal. Careful when tightening the T-case plug as the housing is aluminum. crush seal is recommended
 
will do. I started to round them off I'm afraid. I can't decide if they're 24mm or 15/16ths. The former seems more likely I guess, unless someone replaced the original japanese bolt.
 
Hello,

They are 24 mm. Same for the differential fill/drain plugs.

A 24 mm die with a breaker bar will help.







Juan
 
Use a six point socket and as mentioned a breaker bar to ease the pressure on to prevent rounding the head. Sometimes pressing the socket with the palm of one hand while torquing the bar with the other hand or foot if it's a long bar helps. If it's really buggered then buy another plug and use a good set of vise grips - again with a pipe over it. Use vise grips as a last resort as they will certainly mess it up and there's not much to grap on to. Just go slow.
 
Back
Top Bottom