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| Front Axle Differential: SAE 75-W90, 9.5 qt |
| Rear Axle Differential: SAE 75-W90, 18.05 qt |
| Front Axle Planetary Hubs: SAE 75-W90, 11-13 fl oz (each) |
The total is almost 7 gallons. Mine took every bit of that.
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FMTV High Speed Gears
- Thread starter NDT
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The total is almost 7 gallons. Mine took every bit of that.
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That rear figure includes the hubs which you do not need to drain.
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I'm not sure what you're suggesting. As soon as you pull the large plug to get the shaft out, most of it comes out. Plus, since they are the same as the front hub, that would only save you 11-13oz each, which isn't really much savings when you have to buy almost 7 gallons of fluid.
When I did mine, I didn't "drain" the rear hubs - I just pulled the large plug to get the shaft out. I bought a 5 gallon bucket of gear oil, plus a six pack of quarts, giving me a total of 6.5 gallons on hand. During reassembly, I put all of that in, and was a little short. So I ran to the store, bought 2 more quarts, and put about 1.5 quarts in (e.g. I have about 1/2 quart left in one bottle still). So call it 6.75 gallons, or 7 gallons, if you want, but the TM's numbers are very close.
ramdough
Well-known member
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Did you ever figure out how to calibrate the speedometer?
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Yes it's very easy , you have to do it with the CAT ET software. The pulses per mile have to be changed in the settings for the ECM.
ramdough
Well-known member
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Do you know off hand what it should be with the new gears?
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set the PPM to 49292
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The hub level is at the bottom of the big center nut I think so yours were over full maybe. Rear sets its own level, just the fronts need to be filled but there is no need to do anything to the front to change the diff.
Awesomlmtv
Member
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- 24
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- California
I’ve got a 94 1078, will these work on an A0? Anyone have a set for sale? I’m really excited to get a bit more highway speed and calm the motor down.
Thank you
Thank you
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all diffs are the same except the center axle on a 6x6. they have become expensive due to supply but I have plenty.
LilXerx
New member
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- Carnation, WA
Im looking for a complete set for my m1085
im looking for a complete set for my m1085 if we can figure out shipping.
PFH
Member
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- Kona, Hawaii
Getting ready to finally install my locker and gears, but I would like to check the lash before. Anyone know what the lash measurement is on these? TIA
epicmotorsports
New member
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- ST GEORGE/UTAH
Loomking for a set im in sothern utah shout out if anyone can assist
epicmotorsports
New member
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I blew up my front diff transporting to dock on tbe h1 in hawaii. Gonna fix it in st george ut. I need a set of h speed diffs please for a starving mechanic. Lol had to pull front shaft and pinion on the freeway and limped in with the mode selected to force the drive to work was limited to 30mph max and 5th gear. But made it. Was my fault cuz it was drained and i forgot to check it.
Need to find turret cover and some high speed diffs, i got a couple of used rear diffs in standard config but would prefer to go to the 3.09 diffs
Need to find turret cover and some high speed diffs, i got a couple of used rear diffs in standard config but would prefer to go to the 3.09 diffs
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I've got a set of 3.07s for $4500, taken from new MRAP axles in the crate. I'll toss in a turret cover to help you out.. I've got a green one here somewhere.
epicmotorsports
New member
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- ST GEORGE/UTAH
GreyEnvy
New member
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MecoParts on a big auction site has six 3.07 ring & pinion gears in stock for $875 each with free shipping. With tax, a set of two is $1,872.50.
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So....
Say I was to buy a couple new sets of 3.07 ring and pinions instead of just getting a whole center section. How hard would it be for the average Joe to get the new gears set correctly? Special tooling? Parts (shims and such) ? Would the gear pattern need to be set in the truck (pulling the center section back out to check the gear pattern would not be fun.) ?
Say I was to buy a couple new sets of 3.07 ring and pinions instead of just getting a whole center section. How hard would it be for the average Joe to get the new gears set correctly? Special tooling? Parts (shims and such) ? Would the gear pattern need to be set in the truck (pulling the center section back out to check the gear pattern would not be fun.) ?
