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Jeep CJ7 w/wet cavity between the Dana 300 & AX15 #4572301
11/12/17 10:46 PM
11/12/17 10:46 PM
Joined: Nov 2017
Posts: 7
Edmonton Alberta Canada
CJ71985 Offline OP
CJ71985  Offline OP
Joined: Nov 2017
Posts: 7
Edmonton Alberta Canada
Im in a bind. I have a 1985 Jeep CJ7 and blew the factory T5 transmission. I researched swap options and for the mostly city driving year round from 40 above to 40 below centigrade and medium duty off road use i opted to swap in a medium duty AX15 between my inline 258 (4.2) and the Dana 300 transfer case. Im done all the work now and am getting ready to put fluids in.

I am an Amsoil fan and planned to put MTF into the AX15. I then planned to put 75W90 Gear oil in the Dana 300 (soft yellow metals in both).

The swap introduced a cavity between the AX15 and D300 with an upgraded double seal. I hate relying on shaft seals to keep fluids seperate though and dont believe it will prevent sepage back and forth. This cavity will likely become a wet cavity and i sealed the mating surfaces anticipating the eventuality. Any advice on running the SAME fluid in both gear boxes (the AX15 and the D300)?

First post so please be kind.

I do want to stay away from certain GL5 fluids that are not specifically marked as safe for soft yellow metal.

Thanks

Re: Jeep CJ7 w/wet cavity between the Dana 300 & AX15 [Re: CJ71985] #4572306
11/12/17 11:14 PM
11/12/17 11:14 PM
Joined: May 2015
Posts: 389
AZ
Killer223 Offline
Killer223  Offline
Joined: May 2015
Posts: 389
AZ
i ran amsoil MTG in my my ax15 and dana 300's and the dana 20's i had years ago. no issues.


08 6.7 cummins G56
04 5.9 cummins
11 ranger 4.0
16 KTM 250 XC
Re: Jeep CJ7 w/wet cavity between the Dana 300 & AX15 [Re: CJ71985] #4572331
11/13/17 12:40 AM
11/13/17 12:40 AM
Joined: Jun 2003
Posts: 17,479
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,479
Deplorable in apple valley, ca
It wont leak between them if you put the seal in correctly. I hope you used the 94+ ax15 with the external slave.


02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: Jeep CJ7 w/wet cavity between the Dana 300 & AX15 [Re: CJ71985] #4572369
11/13/17 05:15 AM
11/13/17 05:15 AM
Joined: Sep 2013
Posts: 10,531
Indiana
dlundblad Offline
dlundblad  Offline
Joined: Sep 2013
Posts: 10,531
Indiana
I am not sure what the difference between a MTF and xxw90 GL-4 is, but I've strictly used GL-4 gear oils in manual transmissions.

I want to say Amsoil prefers you run the same fluids in the gearbox and transfer case in the event of a leak. This question rose up a while back on here when (I believe) someone needed something for their manual 4x4 Toyota. Either way, if you're using yellow metal friendly oils in both, you should be fine.

Last edited by dlundblad; 11/13/17 05:16 AM.

03 Jeep WJ 4.0 200k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 149k Rotella T5 10w30 Supertech ST3980

Re: Jeep CJ7 w/wet cavity between the Dana 300 & AX15 [Re: CJ71985] #4572395
11/13/17 06:44 AM
11/13/17 06:44 AM
Joined: Aug 2008
Posts: 19,486
Ontario, Canada
StevieC Offline
StevieC  Offline
Joined: Aug 2008
Posts: 19,486
Ontario, Canada
welcome


'18 Dodge Grand Caravan GT - Valvoline (Break-in)
'06 Santa Fe - 535,000km AMSOIL SS 0w30 / ATF
Re: Jeep CJ7 w/wet cavity between the Dana 300 & AX15 [Re: CJ71985] #4572414
11/13/17 07:25 AM
11/13/17 07:25 AM
Joined: Apr 2016
Posts: 1,185
Campbellsville, KY
Alex_V Offline
Alex_V  Offline
Joined: Apr 2016
Posts: 1,185
Campbellsville, KY
The 300 is a stout unit that certainly shouldn't care about small details of the lube in it. I'd probably run Ams's 75w90 GL4.


I like Chevy and Valvoline.

'13 Cruze, 1.4T, 113K
'85 GMC C3500, 454, 130K
'82 Mercedes 300CD, OM617 turbo, 169K
'67 Suburban, 350, 331K
Re: Jeep CJ7 w/wet cavity between the Dana 300 & AX15 [Re: CJ71985] #4572557
11/13/17 10:20 AM
11/13/17 10:20 AM
Joined: Aug 2003
Posts: 12,963
NE,Ohio
Rand Offline
Rand  Offline
Joined: Aug 2003
Posts: 12,963
NE,Ohio
Should be no issue. you dont have any hypoid gearing in either of those.. so neither requires a gl-5

And a gl-4 will be fine in both.

I would just get whatever MTF you want to make the MT happy.. and most transfer cases are good with just about anything.


2019 Jeep Cherokee Trailhawk 2.0T
Re: Jeep CJ7 w/wet cavity between the Dana 300 & AX15 [Re: Chris142] #4572662
11/13/17 12:06 PM
11/13/17 12:06 PM
Joined: Nov 2017
Posts: 7
Edmonton Alberta Canada
CJ71985 Offline OP
CJ71985  Offline OP
Joined: Nov 2017
Posts: 7
Edmonton Alberta Canada
Originally Posted By: Chris142
It wont leak between them if you put the seal in correctly. I hope you used the 94+ ax15 with the external slave.


Yep. 94 AX15, external slave, clock ring, clipped the shift link ear, double seal on the input shaft of the d300, custom fab a bell housing dust cover, modified a 94 transmission mount, snugged up the skid plate, all new bolts, new seals, new bearings, re-built the d300, new flywheel and clutch, new rear main seals, one piece pan gasket, and valve cover gasket, oil filter, new magnetic drain plugs, quick shifter, twin sticks, and a bronze skull shift knob to top it off Alberta redneck style!

Re: Jeep CJ7 w/wet cavity between the Dana 300 & AX15 [Re: StevieC] #4572664
11/13/17 12:07 PM
11/13/17 12:07 PM
Joined: Nov 2017
Posts: 7
Edmonton Alberta Canada
CJ71985 Offline OP
CJ71985  Offline OP
Joined: Nov 2017
Posts: 7
Edmonton Alberta Canada
Thanks!

Re: Jeep CJ7 w/wet cavity between the Dana 300 & AX15 [Re: Alex_V] #4572665
11/13/17 12:08 PM
11/13/17 12:08 PM
Joined: Nov 2017
Posts: 7
Edmonton Alberta Canada
CJ71985 Offline OP
CJ71985  Offline OP
Joined: Nov 2017
Posts: 7
Edmonton Alberta Canada
The Jeep is a daily driver and it is stored outside in 40 below weather.

Last edited by CJ71985; 11/13/17 12:11 PM.
Re: Jeep CJ7 w/wet cavity between the Dana 300 & AX15 [Re: Alex_V] #4572667
11/13/17 12:09 PM
11/13/17 12:09 PM
Joined: Nov 2017
Posts: 7
Edmonton Alberta Canada
CJ71985 Offline OP
CJ71985  Offline OP
Joined: Nov 2017
Posts: 7
Edmonton Alberta Canada
Originally Posted By: Alex_V
The 300 is a stout unit that certainly shouldn't care about small details of the lube in it. I'd probably run Ams's 75w90 GL4.

Why 75w90 over the MTF?

Re: Jeep CJ7 w/wet cavity between the Dana 300 & AX15 [Re: CJ71985] #4572679
11/13/17 12:16 PM
11/13/17 12:16 PM
Joined: Nov 2017
Posts: 7
Edmonton Alberta Canada
CJ71985 Offline OP
CJ71985  Offline OP
Joined: Nov 2017
Posts: 7
Edmonton Alberta Canada

Re: Jeep CJ7 w/wet cavity between the Dana 300 & AX15 [Re: Rand] #4572692
11/13/17 12:27 PM
11/13/17 12:27 PM
Joined: Nov 2017
Posts: 7
Edmonton Alberta Canada
CJ71985 Offline OP
CJ71985  Offline OP
Joined: Nov 2017
Posts: 7
Edmonton Alberta Canada
Originally Posted By: Rand
Should be no issue. you dont have any hypoid gearing in either of those.. so neither requires a gl-5

And a gl-4 will be fine in both.

I would just get whatever MTF you want to make the MT happy.. and most transfer cases are good with just about anything.


Thats what im thinking.

Re: Jeep CJ7 w/wet cavity between the Dana 300 & AX15 [Re: CJ71985] #4573023
11/13/17 05:37 PM
11/13/17 05:37 PM
Joined: Sep 2013
Posts: 10,531
Indiana
dlundblad Offline
dlundblad  Offline
Joined: Sep 2013
Posts: 10,531
Indiana
Good looking Jeep. I just hope they don't use a lot of salt where you're at.

Sadly, it's pretty rare to see a CJ or any AMC era Jeep on the road here.


03 Jeep WJ 4.0 200k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 149k Rotella T5 10w30 Supertech ST3980


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