I need to change my lube in my Transmission and Transfer case. They are in my 1989 Dodge Cummins truck. What is the best to use? I like AMSOIL. Do I just use regular 90w gear lube or what?

 

Transfer case
-90w gl-5 or use 80w gl-5 if used below -10 degrees. uses 4.5 pints
Auto tranny
-ATF type 7176 or Dexron type 2 if ATF 7176 is not available uses. 8.4 quarts
Getrag 5 speed manual
-5w30 motor oil, synthetic is recommended. I use redline MTL synchromesh fluid, others use royal purple and amsoil synchromesh fluid and like it.
-uses 3.5 quarts, but overfilling it a quart will help it live a longer happier life

 

hey guys, just a quick question. what is the EASIEST way to overfill the getrag? Im not the most auto savy guy but i can get some things done. Oh and one more, can i get amsoil from your everyday parts house like napa or car quest? thanks

 

i use ams in everything on my new one

 

I pull the shifter out, make sure its not in gear when you do. Im fixing to put some RP in the tranny soon, got 75-90 in the tcase with all them shiney happy new bearings.

 

Street elbow in the fill hole.

 

Close, He's 4x4... Gotta go around the T-case linkage.

 

helpful pic. thanks. so after i get that all set up, do i just shimmy a bottle up there and carefully pour in until i have an extra quart in there? and then i just leave that sweet elbow up there?

 

That's what I do. I use a small funnel to reduce the chance of spilling.

 

Thats all well and good but how do you guys check the level?? I just fill in the top pto cover bolt till it comes out.

 

I pull the T-case shifter boot and use a tranny funnel.

Gonna rig up a dip stick shortly. A piece of threaded rod through the fill cap outta do.....

 

A nifty custom dipstick. It's a piece of coat hanger bent into a "J". You check the level by hanging it over the edge of the elbow (makes it repeatable) and then pulling it out. I marked the stick when I filled the trans.

 

genius...now i just need a job so i can pay for all this!

 

Nifty. That would work.

 

+1. Pull the shift tower out. Put it in N before you do. As long as you have no leaks/no worries...