The_Slow_Norris Posted December 12, 2008 Share Posted December 12, 2008 How do? I have an 89 Comanche, 4.0L, Manual, D30 (front), D44 (rear), NP231... What fluids should I use? or would you folks recommend? (I don't have the manual) Anything to Royal Purple? TIA Link to comment Share on other sites More sharing options...
BLHTAZ Posted December 12, 2008 Share Posted December 12, 2008 Royal Purple is good stuff. I personally prefer AMSOIL and use it in everything I own including my lawnmower, trimmer, chain saw, leaf blower and generator ;) . -Your axles will use 75-90 or 80-90 gear oil...either one is fine. If you have a limited slip rear it will need the friction modifier additive. -Engine oil will be something between a 10-30 & 20-50 depending on you climate and engine wear. -Tranny is going to be the same gear oil as the axles. -T-case is automatic tranny fluid if it's the AX15, the BA10/5 uses gear oil. Link to comment Share on other sites More sharing options...
Eagle Posted December 12, 2008 Share Posted December 12, 2008 -Tranny is going to be the same gear oil as the axles. Not quite. He has an '89, which probably means it has an AX-15 tranny, and the AX-15 tranny doesn't like GL-5 rated gear oil. The sulfer in the formulation eats the synchronizers. THe original factory recommendation was an 8-90 gear oil rated GL-3. However, since you could spend a couple of generations trying to find that, according to Pete the factory has changes their recommendation to motor oil. I think I'd be tempted to try the dedicated synchromesh gear oil from Pennzoil, but I don't have an AX-15 to worry about at the moment. Link to comment Share on other sites More sharing options...
BLHTAZ Posted December 12, 2008 Share Posted December 12, 2008 I have used the AMSOIL 85w-90 gear oil in my AX-15 since it had 10,000 miles on it and have had no problems at all other than when I broke the gear for 3rd gear. It has just over 99,000 miles now and still shifts as smooth as it ever has. The tranny shop that did the replacement of hte broken gear said everything else inside looked good as new and the synchros showed no excessive wear. If Chrysler is changing it, then there must be something to it, but I have seen no personal proof that there is any problem. So, with this info...I guess that you should put 10w-30 motor oil in the tranny if it is an AX-15 :thumbsup: Link to comment Share on other sites More sharing options...
bpm4x4 Posted December 13, 2008 Share Posted December 13, 2008 -Tranny is going to be the same gear oil as the axles. Not quite. He has an '89, which probably means it has an AX-15 tranny, and the AX-15 tranny doesn't like GL-5 rated gear oil. The sulfer in the formulation eats the synchronizers. THe original factory recommendation was an 8-90 gear oil rated GL-3. However, since you could spend a couple of generations trying to find that, according to Pete the factory has changes their recommendation to motor oil. I think I'd be tempted to try the dedicated synchromesh gear oil from Pennzoil, but I don't have an AX-15 to worry about at the moment. Mopar has updated the recommended oil for the AX-15 (which as stated, you don't have anyway) to 10-30, but I don't know why. :doh: Link to comment Share on other sites More sharing options...
Pete M Posted December 13, 2008 Share Posted December 13, 2008 Mopar has updated the recommended oil for the AX-15 (which as stated, you don't have anyway) to 10-30, but I don't know why. :doh: Because finding Gl-3 rated gear oil is next to impossible, GL-5 is deadly to the synchros, and they've decided that 10-W30 is the next best thing to the original requirements. :thumbsup: Link to comment Share on other sites More sharing options...
The_Slow_Norris Posted December 15, 2008 Author Share Posted December 15, 2008 WOW 10w-30 eh? That makes me nervous... The idea of putting anything other than gear oil in a manual tranny makes me nervous. :| How about quantity's for the tranny and t-case? Link to comment Share on other sites More sharing options...
The_Slow_Norris Posted December 15, 2008 Author Share Posted December 15, 2008 WOW 10w-30 eh? That makes me nervous... The idea of putting anything other than gear oil in a manual tranny makes me nervous. :| How about quantity's for the tranny and t-case? Link to comment Share on other sites More sharing options...
BLHTAZ Posted December 15, 2008 Share Posted December 15, 2008 The tranny takes a little over 2 qts. and the t-case is just a little over 1 qt. Link to comment Share on other sites More sharing options...
BLHTAZ Posted December 15, 2008 Share Posted December 15, 2008 The tranny takes a little over 2 qts. and the t-case is just a little over 1 qt. Link to comment Share on other sites More sharing options...
Pete M Posted December 15, 2008 Share Posted December 15, 2008 Fill them 'til the oil comes out the fill hole. :yes: You can probably use a thicker engine oil if you'd like. Just don't use anything with the sulfur in it. Link to comment Share on other sites More sharing options...
Pete M Posted December 15, 2008 Share Posted December 15, 2008 Fill them 'til the oil comes out the fill hole. :yes: You can probably use a thicker engine oil if you'd like. Just don't use anything with the sulfur in it. Link to comment Share on other sites More sharing options...
mvusse Posted December 16, 2008 Share Posted December 16, 2008 The tranny takes a little over 2 qts. and the t-case is just a little over 1 qt. But don't put motor oil in the t-case. It takes transmission fluid. Link to comment Share on other sites More sharing options...
mvusse Posted December 16, 2008 Share Posted December 16, 2008 The tranny takes a little over 2 qts. and the t-case is just a little over 1 qt. But don't put motor oil in the t-case. It takes transmission fluid. Link to comment Share on other sites More sharing options...
The_Slow_Norris Posted December 16, 2008 Author Share Posted December 16, 2008 Royal Purple have sulfer? I'm trying to stay brand-tastic. :D Link to comment Share on other sites More sharing options...
BLHTAZ Posted December 16, 2008 Share Posted December 16, 2008 Royal Purple have sulfer? I'm trying to stay brand-tastic. :D This what Sir Google told me... :D ------------------------------------------------------------------------------------------------------------------------------------------------------- Synslide® additive technology is noncorrosive to gears and bearings, including case-hardened gears that are easily pitted by conventional sulfur-phosphorus EP oils. Synslide® additive technology displaces water from metal surfaces and excels in protecting equipment in wet environments. It also fortifies the oil against the detrimental effects of heat, which causes oil to oxidize. Max-Gear® Exclusive Performance Advantages: Severe Service Performance Max-Gear® exceeds Eaton's stringent GL-5 / MIL-L-2105D Gear Oil Specs. Max-Gear® also is safe for GL-4 applications or bronze synchro gears. ------------------------------------------------------------------------------------------------------------------------------------------------------- So it appears to me that there should be no problem in running the Royal Purple Gear Oil instead of motor oil. Link to comment Share on other sites More sharing options...
The_Slow_Norris Posted December 17, 2008 Author Share Posted December 17, 2008 :doh: Point taken. :D Link to comment Share on other sites More sharing options...
BLHTAZ Posted December 17, 2008 Share Posted December 17, 2008 Just as an amendment... I did some more research yesterday and AMSOIL says that there is No Sulfur in any of their products either so I guess that's why I have run the AMSOIL gear oil all these years nad never had a problem. :thumbsup: Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now