21 Ram Rebel transfer case fluid recommendations

[MuzzleFlash40]

Hey all,

I have a 21 Ram Rebel with the BW 48-12 transfer case. Which does not have the 4-Auto option.

The “recommended” Shell Spirax is kinda hard to find in non-bulk form. From what I’m reading is that BW-44 fluid can be used?

Seeing what y'all think. Thanks!

 

[The Critic]

I believe Shell Spirax S2 ATF A389 is an Allison TES-389 approved ATF:
https://shop.sclubricants.com/pub/media/pds/shell/Shell-Spirax-S2-ATF-A389-datasheet.pdf

I suspect that any full synthetic, higher viscosity Dexron-III(H) type fluid will work, but it'll depend on your comfort level. Valvoline does make this product for transfer case applications calling for Dexron:

https://shop.valvolineglobal.com/pr...OMnAddlIpDe98QqZfCh312osX2FXbxG5eGL&Size=1+QT

 

[MuzzleFlash40]

Blauparts has a little section on their website saying that the Ravenol fluid can be used for both transfer cases. Wonder why FCA has such an odd fluid spec’d?

 

[Devo242]

Mopar #68089195AA is stated to fit, but at the cost of $50/quart:
https://store.mopar.com/oem-parts/mopar-transfer-case-lubricant-68089195aa

Redline also claims their MT-LV fluid has compatibility with BW 48 TC's and does so at half the price of Mopar:
https://www.redlineoil.com/mt-lv-70w75w

 

[MuzzleFlash40]

I believe Shell Spirax S2 ATF A389 is an Allison TES-389 approved ATF:
https://shop.sclubricants.com/pub/media/pds/shell/Shell-Spirax-S2-ATF-A389-datasheet.pdf

I suspect that any full synthetic, higher viscosity Dexron-III(H) type fluid will work, but it'll depend on your comfort level. Valvoline does make this product for transfer case applications calling for Dexron:

https://shop.valvolineglobal.com/pr...OMnAddlIpDe98QqZfCh312osX2FXbxG5eGL&Size=1+QT

But it does look like you’re spot on with any full synthetic working. There are a couple cross reference websites that pull up Dex-III fluids for the shell spirax.

So it would be safe to assume Amsoil full synthetic ATF would most definitely be an upgrade over the OE fluid?

 

[MuzzleFlash40]

Mopar #68089195AA is stated to fit, but at the cost of $50/quart:
https://store.mopar.com/oem-parts/mopar-transfer-case-lubricant-68089195aa

Redline also claims their MT-LV fluid has compatibility with BW 48 TC's and does so at half the price of Mopar:
https://www.redlineoil.com/mt-lv-70w75w

Thanks for that info. Looks like Ravenol has that Mopar number listed in its specs sheet for fluids it can replace.

 

[MuzzleFlash40]

I decided on the Amsoil ATF. Thanks for everyone’s help!

 

[kitchbow]

I've run valvoline maxlife atf. In my ram transfer case since 50k ..... at 118,000 and I've used the 4x4 a bit since then...... I see now valvoline has a TRANSFER CASE fluid ......