203 to 205 conversion - The 1947 - Present Chevrolet & GMC Truck Message Board Network

glimmertwin01 · 04-12-2010, 08:25 PM

I have a 74 K5 with a 203 and locking hub .... not sure if its Part time or full time
OK i found a 70 with a 205 the bearing race appears to be the correct size along with the splined shaft that goes into it on my TH350... the only issue appears to be the istance from the mouning flange of the 70 T case support on the tranny side to the center of the U joint for the rear drive shaft is about 16 inches...the rear flange of my dead TH350 in the truck to the center of the U joint is about 20 inches... does this seem right? or do i need a shorter rear shaft from 73-80 a SM465/205 set up? heres some pics..the white tranny is a working TH350 than needs to go into the 74K5... and some of the donor 205... or should I just say bag it? and o with the 203?

Chevy1TonFun · 04-12-2010, 10:35 PM

The 205 you have there has the TH350/TH700 adaptor on it. As for the length for you dl, The 203 and 205 are different lengths. This also depends on which tail housing the t case has. Without more info and pics I would say adjust your dl to fit.

glimmertwin01 · 04-13-2010, 06:32 AM

thanks

04-12-2010, 08:25 PM	#1
glimmertwin01 Registered User Join Date: Mar 2008 Location: Rochester NY Posts: 1,022	203 to 205 conversion I have a 74 K5 with a 203 and locking hub .... not sure if its Part time or full time OK i found a 70 with a 205 the bearing race appears to be the correct size along with the splined shaft that goes into it on my TH350... the only issue appears to be the istance from the mouning flange of the 70 T case support on the tranny side to the center of the U joint for the rear drive shaft is about 16 inches...the rear flange of my dead TH350 in the truck to the center of the U joint is about 20 inches... does this seem right? or do i need a shorter rear shaft from 73-80 a SM465/205 set up? heres some pics..the white tranny is a working TH350 than needs to go into the 74K5... and some of the donor 205... or should I just say bag it? and o with the 203? Attached Images __________________ 67/68 K/20 "The BEAST" 68 K15 V6 LWB. 73 K20 GMC Burb "The Bomber" 74 K/5 74 K20 Custom Deluxe 86 K10 Shorty 92 K2500 Burb 95 K2500 GMC Life is what you make it Live each day like it was your last Old GM Trucks never go out of style

04-12-2010, 10:35 PM	#2
Chevy1TonFun Grease Monkey Join Date: Oct 2007 Location: Fresno CA Posts: 750	Re: 203 to 205 conversion The 205 you have there has the TH350/TH700 adaptor on it. As for the length for you dl, The 203 and 205 are different lengths. This also depends on which tail housing the t case has. Without more info and pics I would say adjust your dl to fit. __________________ Tow Rig: 2012 Chevy 2500HD CCSB LTZ Z71 4x4 Duramax Ultimate Offroad Build: 1978 Chevy Silverado K30 Crewcab Build Link http://67-72chevytrucks.com/vboard/s...d.php?t=654053 Mud Truck: 1972 Chevy Cheyenne K30 4x4, 468/400/205, D60/D70HD, 18" Custom Lift, 17x39" IROKs FOR SALE http://67-72chevytrucks.com/vboard/c...ton-4x4&cat=12

04-13-2010, 06:32 AM	#3
glimmertwin01 Registered User Join Date: Mar 2008 Location: Rochester NY Posts: 1,022	Re: 203 to 205 conversion thanks __________________ 67/68 K/20 "The BEAST" 68 K15 V6 LWB. 73 K20 GMC Burb "The Bomber" 74 K/5 74 K20 Custom Deluxe 86 K10 Shorty 92 K2500 Burb 95 K2500 GMC Life is what you make it Live each day like it was your last Old GM Trucks never go out of style



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