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Tranfercase Question...

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Jeff427, Jun 10, 2000.

  1. Jeff427

    Jeff427 1/2 ton status

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    My brother Jason bought a Chevy truck (I know its not a Blazer but it is a Chevy), that has a fourspeed and a tranfercase out of a 2 1/2 ton (we think). The transfercase is larger than a 205, but it is not a 203 (it's bigger). High range is not straight through, and the rear drive shaft is lower than the transmission input, and it is bolted to the transmission (not divorced). We can't find any tags or obvious identification. Any one know what trasfercase this might be?
     
  2. White Knight

    White Knight 1/2 ton status

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    How many shift Knobs are there? On the t-case!
     
  3. Jeff427

    Jeff427 1/2 ton status

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    Oh yeah, I forgot to mention it only has one shifter for the transfercase, it has 2x, n, 4x, and 4xlo.
     
  4. ken

    ken 1/2 ton status

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    It's probably a married Timken T-221 transfer case used in 1967-1968 and maybe 1969 GM trucks. Prior to this, the T-221 was used as a divorce mount in 1960-66 GM trucks. The T-221 case has the rear output about 6" lower than the input.

    ken
     
  5. Jeff427

    Jeff427 1/2 ton status

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    Thanks Ken, Do you have any more info on the Timken T-221, like gear ratios or durability?

    Jeff427
    http://jeff427.coloradok5.com/
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  6. ken

    ken 1/2 ton status

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    1.94:1 ratio low range, good durability, parts are obsolete though. I'm sure you can get bearings and seals, but probably not gears...course finding used ones shouldn't be too big a problem. I have often thought of using this transfer case in a hugely lifted truck, as the rear output comes out 6" lower which would reduce the rear driveline angle.

    ken
     
  7. AGM73k5

    AGM73k5 1/2 ton status

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    You guys know if that thing is part time or full time?

    ___ __ _ _ ____ __
    AGM73k5 -- ajgm1@yahoo.com
     
  8. Jeff427

    Jeff427 1/2 ton status

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    It is part time. The front drive shaft doesn't turn in 2x.

    Jeff427
    http://jeff427.coloradok5.com/
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