What fluid?

[cetmed]

Hi I'm new to the forum been lurking for a few days.

I'm in the middle of my project 1990, I drained the t-case and the fluid came out thick and purple thought bw1356 was mercron or am i wrong?

never saw purple fluid before.I'm confused? HELP!!!

 

[BLADE262US]

It takes automatic transmission fluid /emoticons/[email protected] 2x" width="20" height="20" />

 

[Krafty]

is it an automatic or a manual?

cause my manual takes gear oil, same as the transmission, and the diffs. There is no primary action pump in the t case, there is no need for an automatic transmission fluid. its all gears and chains. 80wt or 90 wt gear oil is usually the way to go

 

[Krafty]

after looking at the manual, it say the appropriate fluid, my t case says gear oil, so it depends on the t-case I suppose. read the tag or the case near the top drain hole

 

[cetmed]

am unable to read the tag its a bw1356 manual shift

I don't under stand purple fluid

when i say purple thing people eater LOL

thanks

 

[bobstrat]

my 90 came with transmission fluid in it, so that's what i put back in it. i also have a manual shift 1356 and an e4od as well.

 

[cetmed]

Thanks for all the replies

thought it was supposed to be mecron that's what ill put back in since that it what it sounds like from your responses some one probley just added gear oil that would explain the purple color so ill flush it out and fill with mercron

thanks guys will post pics when done with the buildup

 

[BLADE262US]

Krafty the reason for the ATF fluid in these T cases is for the ease of shifting in colder climates and really just in general , ATF provides more than enough lubrication for these units . I am curious why you say there is no pump in these units ? There most certainly is and it is the number 1 cause of failure in these units it is an eccentric piston pump . The thickness of 90 weight would actually accelerate the damage because the stamped steel plate that holds the pump in place would start to bend because of the resistance especially in the cold , you wont find that in the manual . Non of the aluminum T cases take 80/90 I rebuilt one from a duramax diesel awhile back a NP 268HD and it too took ATF . The 13-45 in the 1980 to 1986 trucks took ATF and the 13-56 from 1987 too 1996 took ATF as well as the 13-50,s used in the ranger and bronco 2,s . Please dont just throw out there to someone that doesnt know to put 90 weight in there T case because you might have just cost the unknowing alot of money /emoticons/[email protected] 2x" width="20" height="20" />

 

[Krafty]

mine is a np 208 and it says gear oil, there is a pump for making sure the oil get to the top of the case to everything that needs it, but what I meant was that the automatic transmission fluid needs to be pressurized because its the fluid that helps make it move. in the t case it doesn't require hardly any pressurization because its all gears and chains. " There is no primary action pump in the t case " the pump is for lubrication is not the primary action of the t case. movement is the primary action of the automatic transmission, and that is what the pump in the stator does.