Engine/Transmission (1998.5 - 2002) 80w-90 in rearend ?

[Pit Bull]

Originally posted by Gary - KJ6Q

[B



BUT, yup - what's significant to one member is trivial to another... [/B]

Gary based on your mod's I am way more conservative then you are I just had to jerk your chain alittle The rearend fluid change does not concern me but the type of fluid change in the transmission does. I will be interested in how the lube change in your 6 speed goes. Please keep us posted on driveablity and wear factors. I plan on changing mine every 20K with the factory lube, just because at this point I am to chicken to use anything not recommend by Dodge.

 

[Gary - K7GLD]

The 2 most immediate tipoffs will be the transmission in shifts from 2nd to 3rd - mine never grinds, but if rushed, I can detect a SLIGHT tendency to "catch" 3rd gear - as thought it ALMOST wanted to grind - and of course, the common tendency for these trannies to be stubborn to get into reverse sometimes...



As far as the differential - about all detectable there, will be the apparent operation of the LS portion to function as it should - I expect it to display SOME tendency to spin the inside wheel in tight turns on loose surfaces - but not to grab or chatter on asphalt. Other than that, not much to tell externally unless regular oil analysis is done, and unless something clearly visible in occasional small samples drawn off look suspicious, probably won't have the lube analyzed.



My transmission stock lube was exceptionally clean at 6000 miles - so didn't even pull the cover to check any magnets - seemed a waste - but the differential lube was VERY black and heavy - probably fine LS clutch dust suspended in the lube. I cleaned the innards of the differential as thoroughly as possible, and while the cover was off, drilled and tapped it for a plug so future changes could be made without removing the cover.

 

[John Berger]

I'm using the Amsoil Series 2K 75W-140. I've also used the Series 2K 90W and never added friction modifier. First use of this stuff was at or around 35K. Never have had a problem or chattering.

 

[2-ND TIME]

gear oils

Hello Cooker



Read your message on Mobil 1 SHC 75w-90. Sooory don't believe that to be quit correct. Talking to the Mobil rep on the phone several years ago . He said that this oil didn't have the friction modifier in it and that it would have to be added. There is other oils that they the modifier in it. TDR had an article that said to add extra modifier and added an extra bottle in the Dana 80. The last time that I change the oil in the rear end had 80,000 miles on it. And it was slightly brown but other than that it could have been reused, had it been realllllly clean.

 

[thejeepdude]

REDLINE

I'm using RedLine synthetic in my Dana 70 with no additional modifier. It's rated GL-5/6. Every once in a while I can feel the discs grinding a tiny bit on tight turns, but it doesn't bother me, and it works excellent off-road. I use my truck to reach a 4x4 campsite on a regular basis, which usually involves a little bit of delicate rockcrawling, and I've *needed* that LSD before, and it didn't fail me... so I'm betting that everything's gonna be alright.



Josh



P. S. I use the same oil in my Jeep transmission and Detroit-stuffed pumpkins.

 

[Gary - K7GLD]

If the differential lube NEEDS the additive, it should be pretty obvious due to chattering and grabbing, and easily corrected with additive - BUT, I'm more concerned that my LS still operate as it should with the synthetic - after all, it's not much good if the lube is so slick the LS is non-functional...

 

[Alan Reagan]

Gary, Mine seems to work just fine with synthetic and no modifier. I haven't had any problems and I have pulled on wet grass and had both wheels doing their thing.