switching to Warn lock out hubs - The 1947 - Present Chevrolet & GMC Truck Message Board Network

56hotrodred · 09-27-2010, 11:34 PM

I am building a 73 4x4 - 4 speed with one of my boys and want to put Warn hubs on the front in order to be able to unlock the front end and maybe increase fuel mileage a bit.

After doing a search I also saw mention of doing something to the transfer case. Is that also needed?

As you can tell from my signature I usually hang out elsewhere but have been lurking here for a while trying to learn as much as I can from you guys.

Thanks in advance or any help.

56hotrodred

48cj2a · 09-28-2010, 08:36 AM

Yes, If you have the NP 203 transfercase, there is a kit to either change out the planatary gears item 20 or the rear shaft assembly in this picture: http://www.drivetrain.com/images/sto...3_p1_large.jpg

A good write on this page: http://coloradok5.com/milemarkerpt.shtml

The upper shaft kit is far superior to the one on bottom in strength but is also more expensive.

While you are in there it would be good to check chain wear and change if stretched.

56hotrodred · 09-28-2010, 11:15 AM

I am going to have to look closer at the transfer case as it may be a NP205. I wanted to sell an extra one I had once to a guy once and he said it was the older one with all gears and no chains. He needed the one with chain drive.

So if I have the NP205 is there also a kit to get it part time?

What should my 73 1/2 ton have in? NP203 or NP205?

How can I tell the difference?

Thanks again.

Barry

**71blksuper4x4** · 09-28-2010, 11:22 AM

The np205 is already a part time transfer case. A very nice transfer case in fact.

Here is some pics to tell what you have.
http://www.chuckschevytruckpages.com/drivetrains.html

48cj2a · 09-28-2010, 02:15 PM

[QUOTE=71blksuper4x4;4214048]The np205 is already a part time transfer case. A very nice transfer case in fact.QUOTE]

Like 71 said it is already part time and is the best of the GM transfer cases as far as being heavy duty because it is entirely gear driven and no chains do stretch or break. Just make sure you keep the lube level correct so everthing lubricated.

09-27-2010, 11:34 PM	#1
56hotrodred Registered User Join Date: Aug 2007 Location: Mountain View, Alberta, Canada Posts: 415	switching to Warn lock out hubs I am building a 73 4x4 - 4 speed with one of my boys and want to put Warn hubs on the front in order to be able to unlock the front end and maybe increase fuel mileage a bit. After doing a search I also saw mention of doing something to the transfer case. Is that also needed? As you can tell from my signature I usually hang out elsewhere but have been lurking here for a while trying to learn as much as I can from you guys. Thanks in advance or any help. 56hotrodred

09-28-2010, 08:36 AM	#2
48cj2a Registered User Join Date: Feb 2010 Location: Central, IL Posts: 599	Re: switching to Warn lock out hubs Yes, If you have the NP 203 transfercase, there is a kit to either change out the planatary gears item 20 or the rear shaft assembly in this picture: http://www.drivetrain.com/images/sto...3_p1_large.jpg A good write on this page: http://coloradok5.com/milemarkerpt.shtml The upper shaft kit is far superior to the one on bottom in strength but is also more expensive. While you are in there it would be good to check chain wear and change if stretched. __________________ 03 Suburban Z71 Z71 98 GMC Yukon SLT 4x4 Yukon 86 M1009 CUCV Project Milverado 48 Willys CJ2A 48CJ2A Last edited by 48cj2a; 09-28-2010 at 08:37 AM.

09-28-2010, 11:15 AM	#3
56hotrodred Registered User Join Date: Aug 2007 Location: Mountain View, Alberta, Canada Posts: 415	Re: switching to Warn lock out hubs I am going to have to look closer at the transfer case as it may be a NP205. I wanted to sell an extra one I had once to a guy once and he said it was the older one with all gears and no chains. He needed the one with chain drive. So if I have the NP205 is there also a kit to get it part time? What should my 73 1/2 ton have in? NP203 or NP205? How can I tell the difference? Thanks again. Barry

09-28-2010, 11:22 AM	#4
71blksuper4x4 SWB 4x4 Collector Join Date: Jun 2001 Location: Osage City, KS Posts: 5,151	Re: switching to Warn lock out hubs The np205 is already a part time transfer case. A very nice transfer case in fact. Here is some pics to tell what you have. http://www.chuckschevytruckpages.com/drivetrains.html __________________ TREVOR 1970 CST swb 4x4 (speedwarning,cruise,tilt,tach,8track, original red shoulder belts,tow hooks) 1972 Jimmy (soon to be Hickey cloned) 1971 Cheyenne Super 4x4 swb (tilt,tach,buckets, original blue shoulder belts,am/fm,cruise,tow hooks, dealer 8 track) 1972 Cheyenne Super K20 4x4 Custom Camper (tilt, tach, am/fm, tow hooks, bed toolbox, aux gas tank 1972 Cheyenne Super Crew Cab K30 4x4 Duramax, Allison, np205, buckets, tow hooks (CURRENT PROJECT) http://67-72chevytrucks.com/vboard/s...d.php?t=624819 1989 V3500 Crew Cab (454tbi, NV4500, np205) 1970 Chevelle SS (LS5 454,th400,8track,buckets,tach) :2004 Jeep Wrangler Rubicon (daily driver) WTB: 1968-70 Cruise Control Lever

09-28-2010, 02:15 PM	#5
48cj2a Registered User Join Date: Feb 2010 Location: Central, IL Posts: 599	Re: switching to Warn lock out hubs [QUOTE=71blksuper4x4;4214048]The np205 is already a part time transfer case. A very nice transfer case in fact.QUOTE] Like 71 said it is already part time and is the best of the GM transfer cases as far as being heavy duty because it is entirely gear driven and no chains do stretch or break. Just make sure you keep the lube level correct so everthing lubricated. __________________ 03 Suburban Z71 Z71 98 GMC Yukon SLT 4x4 Yukon 86 M1009 CUCV Project Milverado 48 Willys CJ2A 48CJ2A



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.