Unable to fill differentials to capacity

[Midtenn]

I have Dana35/30 combo with TTs. Because of my lift and adjustable control arms, I'm unable to fill the differential to the listed capacity. I'm a little (~1/4 qt) or so short. I've tried using a ramp and that has helped some.

I'm considering the following

1. Removing control arms/driveshaft to manually rotate the differential, filling, and then rotating back and bolting everything up.
2. Differential covers with higher fill plugs
3. Ignore it...it's close enough

some other solution? I've tried cramming more in there before it pours out and that didn't seem to work.

 

[Jerry Bransford]

Ignore it. If you ever saw a video of how the ring gear picks up the gear lube and slings it around the inside of the housing you'd be amazed and stop worrying about that 1/4 quart it's missing.

 

[LONGJP2]

https://wranglertjforum.com/threads/do-you-jack-up-the-diffs-to-properly-fill-the-diff.51294/

 

[P man]

In before @Rubicon88 starts talking about sticking his pinkies in holes again...

 

[L J]

I'm considering the following

1. Removing control arms/driveshaft to manually rotate the differential, filling, and then rotating back and bolting everything up.
2. Differential covers with higher fill plugs
3. Ignore it...it's close enough

some other solution? I've tried cramming more in there before it pours out and that didn't seem to work.

4. use floor jack to raise differential enough to add measured oil

 

[AndyG]

I parked my front end in a ditch once and laid in the road and filled mine.

realistically, you must have an unusually steep pinion angle.

You can also add more through the vent fitting but it will be slow go.

I’m with @Jerry Bransford though, wherever he is. Unless he is doing something bad, then I just was driving the Jeep.

 

[Jerry Bransford]

I'd use you as my getaway driver anytime Andy.

 

[Midtenn]

I put the Jeep on ramps which is about the same as a jack, correct?

 

[L J]

I put the Jeep on ramps which is about the same as a jack, correct?

Most ramps lift a vehicle ~10" off the ground. My jack lift height is 23".

 

[Jeffseven777]

IF your super worried about it you can tap a new fill hole higher up and plug it up.

 

[jboswell11]

I fill through the vent on my rear 44... is there a reason that wont work with the Dana 35?

 

[Midtenn]

Most ramps lift a vehicle ~10" off the ground. My jack lift height is 23".

Gotcha. That helps clarify it. That height would make a difference for sure.