Redline MT90 or Pennzoil Syncromesh For a AX15

[Jracka]

Want to make sure the transmission that is on my (95) jeep has the best fluid in it. I am going to change it and always hear about these 2 fluids. Which one should i be using in my transmission? Thanks for the help. jason

 

[far_right]

i think they are both reccommended... use either

 

[Tug-n-pull]

Same goes for the ol T-18 and what about my Dana 20 transfer case need to change out both? Am sold on Synromesh and it is a bit cheaper than Red Line. What is the best choice for me. Thanks in advance tug

 

[Bounty__Hunter]

Redline MT90 is the best for the AisinWarner AX5 and AX15. I'd say use Penzoil Synchromesh as a second choice, I don't think it's synthetic like the Redline.

As for you jeepers with the CJ's and the '87-'89 that have the Peugeot, these two gear oils may not provide you any benefits and may not justify the extra expense. I only know of the AX5 and AX15 having the problem with the GL5 being corrosive to the soft brass synchonizers. I'd check into using a quality off-the-shelf synthetic 90W or whichever your owner's manual or FSM recommends.

 

[Snitty]

i did a lot of reading on synchromesh.... it claims to do great work on any manual transmission due to the fact that it is a synchronizer meshing fluid... wonder where they got the name for it