no locking hubs?

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

smurph20

Full Access Member
Joined
Jul 13, 2011
Posts
2,063
Reaction score
23
Location
Clyde, Arkansas 72717
First Name
Brad
Truck Year
1986
Truck Model
K20
Engine Size
350/SM465/NP208/4.10's
Yea ive never had a 203 case only 208's and 205's
 

crazy4offroad

Equal Opportunity Destroyer
Joined
Jul 30, 2010
Posts
8,479
Reaction score
1,109
Location
West BY-GOD Virginia
First Name
Curt
Truck Year
1979
Truck Model
K-10
Engine Size
350/SM465/NP205
In an NP203 4-Hi works like AWD systems today. One rear wheel pulls till the t-case senses a slip, then engages the front output. 4-HI LOC is front and rear pulling all the time.
 

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
30,650
Reaction score
28,969
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
In an NP203 4-Hi works like AWD systems today. One rear wheel pulls till the t-case senses a slip, then engages the front output. 4-HI LOC is front and rear pulling all the time.

It's not that sophisticated though, the t-case doesn't sense anything. It's just an open differential that sends power to both ends at all times. Since it's an open differential, it doesn't bind on dry pavement. "LOC" obviously locks the diff in the 203.

It would be nice if the 203 actually had a posi unit and still had a "loc" mode. It would be much more useful that way.
 

crazy4offroad

Equal Opportunity Destroyer
Joined
Jul 30, 2010
Posts
8,479
Reaction score
1,109
Location
West BY-GOD Virginia
First Name
Curt
Truck Year
1979
Truck Model
K-10
Engine Size
350/SM465/NP205
Yeah, trying for lamens terms. I looked at the exploded view and it would be awesome if someone made a locker for the t-case diff. It's made like a 14-bolt diff.
 

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
30,650
Reaction score
28,969
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
You would think that after all these years, someone would have done it by now. There would be a lot of guys wanting to go with a 203 then... I know I wouldn't be swapping mine out for a 205.
 

thebrad

Member
Joined
Feb 8, 2012
Posts
49
Reaction score
2
Location
Hillsboro OR
First Name
Brad
Truck Year
79
Truck Model
k10
Engine Size
350
Sounds like someone should do some redneck engineering haha. Thanks for the explanation. I was wondering what the difference between the 2 was.
 

Forum statistics

Threads
44,436
Posts
957,938
Members
36,806
Latest member
WarPorpoise
Top