Dana Spicer 3153B 5 Speed Usability in a 66K20

[factorystock]

Any truck trans that wasn't originally installed in a pickup will need some modifications ( drive shaft shortening and parking brake drum removed possible trans hump enlarging ) to make it work, but the 3153 was optional in Chevy medium duty truck during this era, doesn't show 3151B. If it is indeed an overdrive unit like the 3153, it would be a nice upgrade. .8 overdrive works better for working trucks compared to the .7 overdrive found in most all modern pickup overdrive transmissions. Since the '66 transfer case does not mount directly to the trans, it should work with minor modifications.

[Joe P]

Originally Posted by factorystock

Any truck trans that wasn't originally installed in a pickup will need some modifications ( drive shaft shortening and parking brake drum removed possible trans hump enlarging ) to make it work, but the 3153 was optional in Chevy medium duty truck during this era, doesn't show 3151B. If it is indeed an overdrive unit like the 3153, it would be a nice upgrade. .8 overdrive works better for working trucks compared to the .7 overdrive found in most all modern pickup overdrive transmissions. Since the '66 transfer case does not mount directly to the trans, it should work with minor modifications.

Thanks for the info! The unit I am looking at is actually a 3153B. I went shopping for one precisely for the .8 fifth gear. I also like the uniqueness of the Spicer 5 Speed shift pattern. It will put a big grin on my face if I can actually get it and make it work. Thanks again!

[raylube]

Double check your axle gear ratio. Someone correct me if wrong I think they should be 4.57 or 4.56 gears. Would like to see pictures of your truck.

[weim55]

Originally Posted by factorystock

Any truck trans that wasn't originally installed in a pickup will need some modifications ( drive shaft shortening and parking brake drum removed possible trans hump enlarging ) to make it work, but the 3153 was optional in Chevy medium duty truck during this era, doesn't show 3151B. If it is indeed an overdrive unit like the 3153, it would be a nice upgrade. .8 overdrive works better for working trucks compared to the .7 overdrive found in most all modern pickup overdrive transmissions. Since the '66 transfer case does not mount directly to the trans, it should work with minor modifications.

Stunned to see this transmission even exists! Tought I had seen it all, even the 2 ton stuff. Guessing this is one rare bird. Anyone know the original application?? Picture of one??

Steve weim55 Colorado

[WorkinLonghorn]

Originally Posted by weim55

Stunned to see this transmission even exists! Tought I had seen it all, even the 2 ton stuff. Guessing this is one rare bird. Anyone know the original application?? Picture of one??

Steve weim55 Colorado

This is what I have;

[Joe P]

Originally Posted by WorkinLonghorn

This is what I have;

Wow, thanks for posting this info. What is the publication it came from?

[WorkinLonghorn]

Deleted (Info on the Dana).

[Joe P]

Originally Posted by weim55

Stunned to see this transmission even exists! Tought I had seen it all, even the 2 ton stuff. Guessing this is one rare bird. Anyone know the original application?? Picture of one??

Steve weim55 Colorado

There's a guy on E-Bay selling four of them, supposed rebuilt. Search E-Bay for "3153B Spicer" and you will see the posting with a few photos. I have contacted the seller for details, but he has been slow to respond. I will post more info when he get's back to me.