This 14bff will need a lot of work to put it on your truck.Well..this thing was Frankenstein.
Verifies dana 44 up front. Have no idea what gears are since I looked up and dana 44 were not stock in 89. I will pull diff cover to I'd.
Always wondered why rear axle was narrower than front but never went off roading. It wouldn't stay in 4wd.
I got the grinder on the 4wd shifting plate to allow it to change gears fully.
Played around once I got it working for about 10 minutes. Felt like it could pull a house down. I bet they have 2 different gears and it broke the pinion.
So I found for 300 and a 90 day warranty a 14bff out of 99 2500. 3.73. Obviously need to verify front gears in dana 44. I guess I should get a d60 and be done with it.
You need to look for one from a 3/4 ton 73-87 truck or 3/4 ton 73-91 suburban.