HELLO AND A QUESTION

[olblue2]

HELLO , JUST WANTED TO SAY HI AND ASK A QUESTION, I JUST BOUGHT A 1977 K-20 4X4, 4 SPEED, 350 4BBL  TRUCK.  THE FRONT DIFF IS A DANA 44 IM ASSUMING AND THE REAR IS A 14 BOLT GM. THE TRANNY IS THE 4 SPEED ON THE FLOOR. MY QUESTIONS ARE, WHAT MODEL 4 SPEED TRANNY AND TRANSFER CASE IS IN THIS TRUCK?? SOMEONE TOLD ME THE TRANNY IS A MUNCIE 20?? AND THE TRANSFER IS A NP 203?  AND ALSO IF I WANNA CHANGE ALL THE FLUIDS OUT IN THE DRIVELINE, FRONT REAR DIFFS, TRANNY AND TRANSFER   WHAT TYPE AND WEIGHT FLUIDS WOULD I NEED FOR THEM

THANKS FOR ANY HELP AND GLAD TO BE HERE

[Irish_Alley]

well the transfer is probably a 203 the tranny is a sm465 front should be a 44 and rear should be 14 i use 85-90 in my axles as far as the tranny goes haven't got there yet but someone will chime in on that part

[77chevystepside]

try this link to learn about what was put in these 77 trucks.
 http://www.chuckschevytruckpages.com/73-87specs.html

I was told my 77 1/2 ton only came with NP205 and that is what is in it. I use 80 weight gear lube or 80 W90 gear lube in trans, tansfer case and differentials.

[VileZambonie]

The 203 calls for 10w30 or 40

the 205 calls for GL5

[olblue2]

ok another question, when i got the truck the guy said he had to replace the right front axle, the shaft coming from the hub to the diff. im a little out of touch on these old trucks but when i lie under the truck and turn the front drive shaft by hand, shouldnt both left and front axles turn? only the left one will turn when i turn the driveshaft, the right one doesnt move. i jacked the wheel up that had the axle replaced and it spins fine .  or is one not turning because its an open diff?   any help will be greatly appreciated

[Irish_Alley]

Na only one should spin unless you have a locker