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Mike C · 01-04-2018, 10:18 PM

Rockwell 221, the Dana 20, and NP205 all came from the factory in a 69-72 Blazer/Jimmy. But IMO, the 205 is hands down best choice, as well as the factory equipped T-case in 90% of the first gen K5's.

But if my truck had a 221 I'd run it until it didn't work anymore. Same with the Dana 20. But if you have to buy one, once again, NP205 as it is the most common transfercase you will find for sale.

01-04-2018, 10:18 PM	#2
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,709	Re: Transfer case choice Rockwell 221, the Dana 20, and NP205 all came from the factory in a 69-72 Blazer/Jimmy. But IMO, the 205 is hands down best choice, as well as the factory equipped T-case in 90% of the first gen K5's. But if my truck had a 221 I'd run it until it didn't work anymore. Same with the Dana 20. But if you have to buy one, once again, NP205 as it is the most common transfercase you will find for sale. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax