Swapping from the NP136 to the BW4472 (need feedback please)

FROM AWD'S TO 2-SPEED MANUAL SHIFT, IF IT LINKS THE REAR AXLE TO THE FRONT AXLE, POST IT HERE.

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Meterpig
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Swapping from the NP136 to the BW4472 (need feedback please)

Post by Meterpig » Sun Jan 04, 2015 7:39 am

So, first I want to thank Photo_Van for playing into my devious plans. As I mentioned before, I am on NP136 #2. #1 froze up and stretched the chain probably due to my negligence. I learned that the Tcase fluid must be changed every 15k under "hard" use. I would say...I use it "hard". So, #2 went in from a junk yard with fresh fluid and lasted one season before losing AWD. Then...this winter the "service AWD" light came on leading me to believe the motor is now losing life.

Option 1) rebuild my existing case in the corner of my garage which will last x number of months/years depending on use.

Option 2) Get a BW4472 (hopefully from Photovan), change out front shaft and most likely rear and never worry again. The downside being locating/modifying the drive shafts.

So, I have searched for better part of a week and found a few S10 guys who have claimed to have done this with the axles from an older van as well (27 spline vs 32 spline). However, I haven't found a documented case where an owner of an 03-05 astro who went "backward" putting in a BW4472. If you know of a link...please let me know.

One question that has come up is "why not just swap in a selectable t-case?" The answer? My wife drives the van most of the time. I want it to be easy and simple...and when I go to sell...invisible to the buyer. I love the idea of a selectable T-case...however...it would just become more of an incentive to go all the way....

So...good move or bad?
What do you think of my quest to swap transfer cases to the venerable BW4472?
viewtopic.php?f=58&t=9962

Photos including tear down for intake gaskets (PITA)
http://www.smugmug.com/gallery/n-xSjRG/i-bHzD6cz

photo_van
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Re: Swapping from the NP136 to the BW4472 (need feedback ple

Post by photo_van » Sun Jan 04, 2015 2:36 pm

Besides what we've already talked about PM; if i didn't need low range I would have kept the 4472, it was a great AWD tc. I drove it in a lot of what people might call 4wd instances, never slipped or failed. That said, they do have a viscus clutch, that over time can fail. From reading the forums, perhaps it doesn't happen all that much.
1998 AWD/4WD
4" lift, 31x10.50's, NP 242j/c hybrid, 4.10 gears, S10 front disconnect, rack & pinion steering, trans cooler, rock sliders, ARB fridge, house battery and 100w solar, swing out rear rack with foldout camp table, bed and passenger swivel chair
dirt bag camping rig
1981 Toyota 4x4 pu
1974 John Deere 710
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mdmead
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Re: Swapping from the NP136 to the BW4472 (need feedback ple

Post by mdmead » Mon Jan 05, 2015 4:45 am

I LOVE my viscous transfer case! Best single-speed unit out there as far as I'm concerned. This case is what makes the Astro/Safari THE BEST snowy/icy road vehicle out there. Now, just need to find a suitable 2-speed transfer case with a VISCOUS AWD option... :muhaha:
Matt
Selah, WA
-96 GMC Safari AWD Hi-Top Conversion -->Stalled 5.3L swap & 5" lift
-74 Ford Bronco -->Far from perfect but mine!
-99 V-10 Ford Super Duty Super Cab 4x4 -->Stock with 285 Cooper ATs
-00 Ford Focus Wagon -->The Red Turd
-95 Ford 24' Class C Motorhome -->My big block sleeper
-07 Can-Am Outlander XT -->My yellow 4x4 quad for work & play
-04 Ski Doo REV Summit -->Still several chassis behind!


No new projects until the current ones are done!

photo_van
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Re: Swapping from the NP136 to the BW4472 (need feedback ple

Post by photo_van » Mon Jan 05, 2015 12:55 pm

NP 249; viscous and positive 4LO.
1998 AWD/4WD
4" lift, 31x10.50's, NP 242j/c hybrid, 4.10 gears, S10 front disconnect, rack & pinion steering, trans cooler, rock sliders, ARB fridge, house battery and 100w solar, swing out rear rack with foldout camp table, bed and passenger swivel chair
dirt bag camping rig
1981 Toyota 4x4 pu
1974 John Deere 710
Image

LiftedAWDAstro
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Re: Swapping from the NP136 to the BW4472 (need feedback ple

Post by LiftedAWDAstro » Mon Jan 05, 2015 5:45 pm

I have owned both transfer cases and much prefer the 4472. You aren't waiting for some rear wheel slip before it engages like the 136. I got no better mileage having the 136. It also has a MUCH higher failure rate. I say switch to the 4472 and never look back...except to see all the 4x4 trucks stuck! :muhaha:
Current rides:
2013 Toyota Tundra DC 4x4
2008 Dodge Nitro 4x4
2005 Nissan Sentra 1.8S Special Edition

Mileage spreadsheet

Vans owned:
1986 Safari 2.5L 4 speed manual - scrapped
1995 Astro 2WD conversion 4.11 posi, shift kit, DHC rock rails - sold to Skippy
1998 Astro 4x4 D44, D60, NP231, full hydraulic system with 9k# Milemarker winch and snow plow - sold to Lockdoc
2003 Astro AWD all stock - traded for a 3/4 ton truck
2005 AWD, 4.10's - sold to skippy

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mdmead
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Re: Swapping from the NP136 to the BW4472 (need feedback ple

Post by mdmead » Tue Jan 06, 2015 4:44 am

photo_van wrote:NP 249; viscous and positive 4LO.
For some reason, I think I might have ruled this case out... but I don't remember why... High failure rate of the viscous unit maybe? I'll look at it again when I get there.. and I'm a long way from there! A unit that also popped up on my radar... don't laugh... was a unit out of a Toyota Land Cruiser. (This one is harder to come by and pricey.)
Matt
Selah, WA
-96 GMC Safari AWD Hi-Top Conversion -->Stalled 5.3L swap & 5" lift
-74 Ford Bronco -->Far from perfect but mine!
-99 V-10 Ford Super Duty Super Cab 4x4 -->Stock with 285 Cooper ATs
-00 Ford Focus Wagon -->The Red Turd
-95 Ford 24' Class C Motorhome -->My big block sleeper
-07 Can-Am Outlander XT -->My yellow 4x4 quad for work & play
-04 Ski Doo REV Summit -->Still several chassis behind!


No new projects until the current ones are done!

ihatemybike
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Re: Swapping from the NP136 to the BW4472 (need feedback ple

Post by ihatemybike » Tue Jan 06, 2015 12:04 pm

NP249 aren't looked highly upon by the Jeep crowd, mostly due to the overheating failures with heavy off-road use.
Aaron

2005 Astro (Gandalf) - AWD, 4.3L, 3.42, 130k+ miles
1997 Astro (Grumpy - $250 Rally Van) - AWD, 4.3L, 3.42, LSD, 2" lift, 31" tires, 335k+ orig engine, $30 eBay fuel pump
Prev Astros:99,97,00,94,87,86

Meterpig
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Re: Swapping from the NP136 to the BW4472 (need feedback ple

Post by Meterpig » Tue Jan 06, 2015 7:29 pm

I hope this happens...and if it does, I will chronicle it for the internet masses.
What do you think of my quest to swap transfer cases to the venerable BW4472?
viewtopic.php?f=58&t=9962

Photos including tear down for intake gaskets (PITA)
http://www.smugmug.com/gallery/n-xSjRG/i-bHzD6cz

photo_van
I sleep in my van
Posts: 594
Joined: Wed May 18, 2011 11:38 pm
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How many wheels are on an Astro van? (4): 4
Location: 7000' in the Mountains of California

Re: Swapping from the NP136 to the BW4472 (need feedback ple

Post by photo_van » Tue Jan 06, 2015 9:36 pm

I've been working on boxing it up today. I have to find some additional resources...
1998 AWD/4WD
4" lift, 31x10.50's, NP 242j/c hybrid, 4.10 gears, S10 front disconnect, rack & pinion steering, trans cooler, rock sliders, ARB fridge, house battery and 100w solar, swing out rear rack with foldout camp table, bed and passenger swivel chair
dirt bag camping rig
1981 Toyota 4x4 pu
1974 John Deere 710
Image

Meterpig
I finally get the smurf thing
Posts: 195
Joined: Wed Dec 29, 2010 12:06 am
antispam: No
How many wheels are on an Astro van? (4): 4

Re: Swapping from the NP136 to the BW4472 (need feedback ple

Post by Meterpig » Wed Jan 07, 2015 11:18 pm

Alright...so I have been informed the transfer case and axle will be inbound soon. Woot!
What do you think of my quest to swap transfer cases to the venerable BW4472?
viewtopic.php?f=58&t=9962

Photos including tear down for intake gaskets (PITA)
http://www.smugmug.com/gallery/n-xSjRG/i-bHzD6cz

photo_van
I sleep in my van
Posts: 594
Joined: Wed May 18, 2011 11:38 pm
antispam: No
How many wheels are on an Astro van? (4): 4
Location: 7000' in the Mountains of California

Re: Swapping from the NP136 to the BW4472 (need feedback ple

Post by photo_van » Thu Feb 12, 2015 3:59 am

update??
1998 AWD/4WD
4" lift, 31x10.50's, NP 242j/c hybrid, 4.10 gears, S10 front disconnect, rack & pinion steering, trans cooler, rock sliders, ARB fridge, house battery and 100w solar, swing out rear rack with foldout camp table, bed and passenger swivel chair
dirt bag camping rig
1981 Toyota 4x4 pu
1974 John Deere 710
Image

Meterpig
I finally get the smurf thing
Posts: 195
Joined: Wed Dec 29, 2010 12:06 am
antispam: No
How many wheels are on an Astro van? (4): 4

Re: Swapping from the NP136 to the BW4472 (need feedback ple

Post by Meterpig » Sun Feb 15, 2015 5:12 pm

So here is the deal, the tcase sits on my work bench. I have sourced a front shaft..and that is the next step. I don't want to swap it to my current van as it's not an 05. But...I realize swapping it to the new van won't be hard either. At any rate, I love having the tcase and the option of the Borg warner and not being stuck with the NP.
What do you think of my quest to swap transfer cases to the venerable BW4472?
viewtopic.php?f=58&t=9962

Photos including tear down for intake gaskets (PITA)
http://www.smugmug.com/gallery/n-xSjRG/i-bHzD6cz

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