Gear oil in a 203.

[scooter122983]

So this week i cracked apart my tranny and 203. The tranny was blown so i needed to take the two apart. My problem is why does my 203 smell like my axles isnt it supposed to have 10-30 in it? Im getting sick of dealing with PO issues.

 

[desertrat67]

I thought the 203 and 205s used gear oil?

 

[yellowK20]

the 203 use's straight 30 weight motor oil.

if you use ATF or gear lube it will kill the chain because it does not lube properly

 

[K5_Fla]

I always thought ATF for everything except the NP205 - gear oil for that.

 

[yellowK20]

No, NP203 takes 30 weight

ATF goes in aluminum T-case's like the 208 and 241

 

[owenst7]

Non-detergent straight 30 weight. End of story.

 

[77_Jimmy]

The owners manual for my 77 says 10w30 or 10w40 motor oil for the 203.

 

[Hogback Fabrication]

The owners manual for my 77 says 10w30 or 10w40 motor oil for the 203.

They're pretty tolerant, but motor oil vs. gear oil is a good call.

The gear reduction box (the part we use for our doubler setups) is fine with 80W90 or something similar, it's the rest of the 203 that needs the light oil.

 

[desertrat67]

I didn't know this. The 205s did specify atf in the later years also.

 

[yellowK20]

Yeah the Synchronized ones IIRC

 

[desertrat67]

Yup, them's the ones.

 

[scooter122983]

How do you finger that i should remedy this? Just drain it and fill it with the correct lube?

 

[yellowK20]

Yeah you could fill it with solvent and drain it to wash out the gear oil

and then re-fill with ATF.

 

[scooter122983]

Yeah you could fill it with solvent and drain it to wash out the gear oil

and then re-fill with ATF.

Why ATF? Shouldn't I be running 10-30.

 

[yellowK20]

er yeah lol sorry

 

[blazinzuk]

No not 10-30 straight 30 is what you want in your 203 and I would just drain it and not really worry about filling it with solvent.

 

[scooter122983]

Alright thats what ill do then. Strait un-adulterated 30W.

 

[77_Jimmy]

Where is all this straight 30 weight nonsense coming from?

 

[yellowK20]

My Dodge owners manuals always called for 30w . but really as long as 30ish weight Motor oil your fine

 

[63chevyll]

30 ok, and 10w30 ok