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89 Sierra diff centres
Posted: Fri Dec 19, 2008 7:46 pm
by Durko1
Can anyone tell me if the front and rear diff centres of a 89 sierra are the same. If they are the same can the front be used in the rear as my rear diff is shagged and I have a spare front diff
Posted: Fri Dec 19, 2008 7:55 pm
by want33s
They are the same ratio gears (3.7:1) but the side gears inside the centre are 26 spline rear and 22 spline front...
89 fronts are mostly 2 pinion whereas rears are 4 pinion.
Jas.
Posted: Sat Dec 20, 2008 9:30 am
by scooby_74
you can pull the side gears out of your rear diff and put them in your front. Means that you have a 2 pin rear centre, not as strong but seen it done heaps
Posted: Mon Dec 22, 2008 8:51 am
by Pinball
Interesting...
wasn't aware of a difference, mines a late 89 and i believe they are the same... have had fronts fitted to my rear before, not that i did the job so unsure of mods required.
Spock
Posted: Mon Dec 22, 2008 9:11 am
by Gwagensteve
NT sierras have 4 pin front and rear.
Early WT (plastic flares) have 4 pin front and rear.
Steel flare WT have 2 pin front.
Steve.