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What are you going to do to the diff?

I'm pretty sure these are the air springs you need. I didn't check around for prices but these should fit.

http://www.truckspring.com/sus.../ride-rite-0335.aspx

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quote:

Originally posted by Larry kiteboardman:


Just pulling the cover and changing the fluid. It just sounds better to say I am doing work on the differential.

You can drain the diff without jacking if you crawl OK.

Be sure to be on level concrete.

I suspect your axle bearings are lubricated by the diff lube. This means that for a more complete drain, one wheel needs to be higher than the other so the fluid will drain into the diff housing. Do that for each side. Driving up on a block is safest, but jacking is OK if you don't go underneath. Block both front wheels forward and behind. If you go underneath, use a jack stand of sufficient rating.

After refilling, check lube level after a trip around a few blocks. Sometimes the level will drop due to lube going back into the bearing cavities.

As far as the air bag replacement, you might be able to just jack one frame rail at a time to get the clearance you need. Same advice on chocking and jack stands.

quote:

Originally posted by Steve VW:
I'm pretty sure these are the air springs you need. I didn't check around for prices but these should fit.

http://www.truckspring.com/sus.../ride-rite-0335.aspx

Are those for a tag or drive axle?

Drive axle.. Ride-Rite 2080 kit. my tag was a goodyear 1R9 038 I think.

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OK, thank you, Steve. It didn't look familiar because I am using Air Lift bags on my drive axle.

Have you replaced your tag bags?

quote:

Originally posted by Larry kiteboardman:
How much oil in the Dana 70 and should I do synthetic 75 90 or what?

I do not recommend Synthetic diff oil. I change my diff fluid to Amsoil when I first had it and almost immediately a wine developed. I change two other vehicles and they also developed a wine in a few week of driving.

I went back to regular Castrol and added Power Punch SP-1. The wine slowly got less and less. Still there but not nearly as bad.

I believe Rusty had a similar problem.

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Indeed, that exhaust pipe looks awfully close to the suspension.

I use Valvoline 75W140 in my diffy since billyt53 overhauled it (17K miles ago), without incident.

My opinion is that synthetic oil isn't the problem, Amzoil is.