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sierra diff and transfer case question
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Author:  grimreaper [ Tue Aug 26, 2008 9:38 pm ]
Post subject:  sierra diff and transfer case question

hi
i have an wt sierra with the handbrake on the rear drums and na mate has an old diff out of his sierra (think ti is an 88 or 89 model ) and his handbrake is on his transfer case . no i want to can i put is diff in my sierra as i have an almost stuffed diff , and same goes for the transfer case .

note thay are both soft tops and leaf springs

Author:  steve [ Tue Aug 26, 2008 9:46 pm ]
Post subject:  Re: sierra diff and transfer case question

his might be a NT so the diffs are narrow, yours is wide track so wider diffs.

You can pull his diff centers out and put them in your wide track housings, and you can use his transfer case aswell, all bolts straight up, except the NT and WT drive shaft flanges are different, you can swap flanges or just use his drive/tail shafts.

Author:  grimreaper [ Tue Aug 26, 2008 10:07 pm ]
Post subject:  Re: sierra diff and transfer case question

steve wrote:
his might be a NT so the diffs are narrow, yours is wide track so wider diffs.

You can pull his diff centers out and put them in your wide track housings, and you can use his transfer case aswell, all bolts straight up, except the NT and WT drive shaft flanges are different, you can swap flanges or just use his drive/tail shafts.

ok thx for that

Author:  grimreaper [ Tue Aug 26, 2008 10:08 pm ]
Post subject:  Re: sierra diff and transfer case question

also one other question. the front diff is it an straight swap for the rear diff center to fit in my front diff or do i have to do some modes to the diff

Author:  Damo [ Tue Aug 26, 2008 10:31 pm ]
Post subject:  Re: sierra diff and transfer case question

grimreaper wrote:
also one other question. the front diff is it an straight swap for the rear diff center to fit in my front diff or do i have to do some modes to the diff


It's not a straight swap. The side gears are 22 spline in the front and 26 spline in the rear. It will physically bolt into place but you won't be able to put the axle shafts in.

Author:  CairnsZook [ Tue Aug 26, 2008 10:36 pm ]
Post subject:  Re: sierra diff and transfer case question

Don't NT's and WT's have different diff ratios too?

Author:  royce [ Tue Aug 26, 2008 10:48 pm ]
Post subject:  Re: sierra diff and transfer case question

yes they do, thats why you need to swap font and rear together

Author:  grimreaper [ Tue Aug 26, 2008 11:30 pm ]
Post subject:  Re: sierra diff and transfer case question

Damo wrote:
grimreaper wrote:
also one other question. the front diff is it an straight swap for the rear diff center to fit in my front diff or do i have to do some modes to the diff


It's not a straight swap. The side gears are 22 spline in the front and 26 spline in the rear. It will physically bolt into place but you won't be able to put the axle shafts in.
so i just use the sotck front axels or do i have to do somthink eles

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