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#1 |
Registered User
Join Date: Apr 2018
Location: Pittsfield NH
Posts: 2
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‘75 suburban help
I am looking at a 75 suburban with a 400sbc and the np203 transfer case. Any reason to steer clear? I seem to remember the 400 being prone to cracking blocks and I dont know too much about the 203 transfer case. Planning on a family cruiser. Not planning on any real off roading. Small lift and 35’s are probably in its future. I think my concern is the 203 transfer case as I am not familiar with it. The body is in great shape and I am not a body guy so that seems more important then a mechanical part that I can swap out if need be.
Last edited by Kmanrsss; 06-27-2024 at 09:26 AM. |
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#2 |
Senior Member
![]() Join Date: Mar 2016
Location: Longview, TX
Posts: 758
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Re: ‘75 suburban help
They're a heavy chain driven transfer case. Full time four wheel drive with a center diff lock. I drive a '78 K5 that we bought new with the NP203. They're a really strong transfer case. I've done lots of really stupid things with this truck and we've never had a problem. They're always compared to the part time gear driven NP205 of the same era, which isn't exactly apples to apples. People will tell you to install a part time kit. Don't do it. You don't gain much on fuel economy and oil no longer is distributed correctly inside. Also, use a non-detergent oil for the inside. We pro-actively rebuilt it about 10 years ago, but it didn't really need it. I've always liked having full time four wheel drive. It always feels sure footed when things go south.
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#3 |
Born Psycho
![]() Join Date: Feb 2001
Location: brentwood,cal,usa
Posts: 4,882
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if it's a good deal I'd say go for it, my 80 has a 400 small block and has been dependable so far.
__________________
jerry moss 72 cheyenne super K20- tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,tow hooks,bumper guards,toolbox,aux. fuel tank,posi front and rear,plus other goodies!!! SOLD 69 suburban K20-tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,4 inch all spring lift,4 speed, 14 bolt full floater, dana 44 HD,warn winch,posi front and rear,tow hooks,plus other goodies. 73/80 chevy/gmc K20 SB400,turbo 400,205,tilt,a-c,gas hog. 77 K/5 cheyenne blazer-daily driver/beater. SON HAS IT NOW BRENTWOOD,CALIFORNIA |
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#4 |
Registered User
Join Date: Apr 2018
Location: Pittsfield NH
Posts: 2
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Re: ‘75 suburban help
Thanks for the replies. I did buy it. Seems to run good. Body’s in great shape. It has a few minor issues and 1 thantvim nit sure what’s going on but should get it diagnosed shortly.
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