anybody tried to lower the front diff on a lifted AWD

anybody tried to lower the front diff on a lifted AWD

Postby nog00der [OP] » December 14th 2012, 8:20am

ive been poking around under there trying to see different ways i could take out some of the extreme angles i have in my CV joints. maybe lowering the differential would work? 3 of the mounting bolts look somewhat simple. the rear drivers side mount would hit some of the frame tho so there would be some cutting involved. anybody try this yet?
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Re: anybody tried to lower the front diff on a lifted AWD

Postby grandamle91 » December 14th 2012, 8:37am

I was woundering the same
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Re: anybody tried to lower the front diff on a lifted AWD

Postby Corsemoto » December 14th 2012, 11:32am

Into on Blazer forum in Rough Country lift thread. Kit includes diff relocation with wedge spacer for passenger side diff mount, bolt on bracket for driver's side front mount tab and a template to cut off the original mount where the replacement bolts to side cover on diff. Not the same subframe but could do something very similar.

http://www.roughcountry.com/install/242n2.pdf
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Re: anybody tried to lower the front diff on a lifted AWD

Postby shavedlummox » July 28th 2013, 7:09pm

I did on my 99 awd. I had the whole subframe out for an engine swap so I did it on the floor. It is a **** of a job and I made everything from scratch. The joys of owning a fab shop. You could do it in place if you drop the diff. I also installed a GMC JImmy part time diff, but its pretty much a bolt up swap stock.

Make sure you get your driveline angles right. An angle finder is a must for the job, as is an understanding of keeping driveline angles parallel with conventional u joints. double cardain joints are a different matter. As of yet, I am driving this van, but have not finished the wiring for the new part time transfer case so I don't know if vibration will be an issue. I have done a lot of work like this in the past and am sure it will be good on winter highways.

I hung the diff from mechanics wire and started measuring. Welded in a couple of plates for the passenger side mount and where it bolted onto the tab on the frame I just cut the mount in the middle and stretched it downwards with some flat bar bent into a box shape. Don't do it unless you own a welder and are quite handy with it.
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Re: anybody tried to lower the front diff on a lifted AWD

Postby shavedlummox » July 28th 2013, 7:17pm

Oh, and I ground some material away from the front of the diff, plus ended up shimming one of my idler arms just a touch to drop the steering out of the way. I think I dropped it a touch too much. Less is better here.
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Re: anybody tried to lower the front diff on a lifted AWD

Postby beneng_jr » May 27th 2020, 4:44am

shavedlummox wrote:I did on my 99 awd. I had the whole subframe out for an engine swap so I did it on the floor. It is a **** of a job and I made everything from scratch. The joys of owning a fab shop. You could do it in place if you drop the diff. I also installed a GMC JImmy part time diff, but its pretty much a bolt up swap stock.

Make sure you get your driveline angles right. An angle finder is a must for the job, as is an understanding of keeping driveline angles parallel with conventional u joints. double cardain joints are a different matter. As of yet, I am driving this van, but have not finished the wiring for the new part time transfer case so I don't know if vibration will be an issue. I have done a lot of work like this in the past and am sure it will be good on winter highways.

I hung the diff from mechanics wire and started measuring. Welded in a couple of plates for the passenger side mount and where it bolted onto the tab on the frame I just cut the mount in the middle and stretched it downwards with some flat bar bent into a box shape. Don't do it unless you own a welder and are quite handy with it.


Curious, since you have a fab shop, hypothetically what do you think you would charge someone for this? Ive been looking at converting my AWD to straight axle buts its cost prohibitive since its something I can't do myself.
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