In this SECOND of a TWO part video series, we do a COMPLETE step by step rebuild and remanufacturing of the New Process Gear 246 (aka NP246) transfer case as used by GM starting in 1998 in EPIC detail. This NP246 shown is a first generation transfer case known as the Auto-Trak (or Auto-Trak I), or as regular production option (RPO) NP8. The NP246 transfer case is very similar to the NP236, and we will call out those differences as we go where we can. These transfer cases were built by New Process Gear for both GM and Chrysler, later changing to New Venture Gear. After the name change, it became the NV246 (or NVG246).
*Link to part I:* https://youtu.be/11dcXWnipkY
*The eBay and Amazon search links below are paid links, for which I may be compensated and earn a commission, if you choose to buy the parts and tools shown in this video thru them:*
OG clutch shims - GM 12470944, GM 12470945, GM 12470946, GM 12470947, GM 12470948, GM 12470949, GM 12547610, GM 12547611, GM 12547612, GM 12547613, GM 12547614, GM 12547615, GM 12547616, and GM 12547617: https://ebay.us/UJ8Exc
Clutch shims USA Standard Gear - ZTNP29879, ZTNP29880, ZTNP29882, ZTNP29884, ZTNP29886, ZTNP29888: https://ebay.us/RCIWLx
Bearings - GM 12384993, GM 88962351: https://ebay.us/bUd3m1 or https://amzn.to/3BrCIfJ
Output shaft bushing - GM 15665313: https://ebay.us/bqJBli or https://amzn.to/3zi5o8t
Retaining rings - GM 12547623, GM 12547477, GM 12547475, GM 12470554, GM 12547637: https://ebay.us/uqDb4p
Chain (1998 - 2000 only - one blue link) - GM 12547662: https://ebay.us/GvuG3k
(2001 - 2007 only - three blue links) - GM 12474602: https://ebay.us/Jio3mk
Case saver - GM 89059653: https://ebay.us/q5lFRb or https://amzn.to/3oK9d18
Oil Pump, o-ring seal, filter - GM 12547630, GM 15547430, GM 15547432: https://ebay.us/8JwhzV
Case bolts, case elbow vent - GM 88996722, GM 12470561, GM 89059654: https://ebay.us/tJlOYl or https://amzn.to/3bnCw6Q
Encoder motor seal & bolts - GM 88891184, GM 25624810: https://ebay.us/A4tEnK
Access hole plug, speed sensor o-ring seals - GM 12470560, GM 19133158: https://ebay.us/KHYE7F or https://amzn.to/3Br0RmN
Seals - GM 12547638, GM 12474947, GM 12547466: https://ebay.us/lUF9bz or https://amzn.to/3Bw3rIb https://amzn.to/3zJeSLo https://amzn.to/3ONTngw
Loctite 640: https://ebay.us/2ekN8a or https://amzn.to/3vx7L67
ACDelco RTV sealant - GM 88864346 / ACDelco 10-2006: https://ebay.us/CLMy8B or https://amzn.to/3OM1QRt
ACDelco 10-4017 / GM 88900402 Auto-trak II fluid: https://ebay.us/tVpIJS or https://amzn.to/3bk7QmQ
Kent-Moore J-8092 drive handle: https://ebay.us/Twtzvg
Kent-Moore J-45380 bushing installer/remover: https://ebay.us/4faQwt
Kent-Moore J-37668-A rear output shaft seal installer: https://ebay.us/rmt3GV
or
Merchant Automotive 10695 rear output shaft seal installer: https://ebay.us/MUCIco
Kent-Moore J-43484 front output shaft seal installer (NP246 only): https://ebay.us/8aSp1I
or
Adapt-a-case T-M109RAC front output shaft seal installer: https://ebay.us/oYWLLt or https://amzn.to/3P3jXT9
Kent-Moore J-44636-1 front output shaft seal installer (NP236 only): https://ebay.us/AKoqFQ
Kent-Moore J-44636-2 front output shaft seal installer (NP236 only): https://ebay.us/Pc39p6
Kent-Moore J-42738 front input shaft seal installer: https://ebay.us/1OKA4O
or
Merchant Automotive 10325 front input shaft seal installer: https://ebay.us/amOrTe
Kent-Moore J-44295 clutch pack preload shim measuring tool: https://ebay.us/lzzc1s
Bearing driver set: https://ebay.us/tnbdJo or https://amzn.to/3PQketL
GM transfer case unit repair manual (use 1999 and later only): https://ebay.us/PIJTX1
_And if I've saved you some $$ here, consider some coins for the coffee tip-jar!_ https://ko-fi.com/drshock
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007
Chapters:
0:00 - Re-assembly overview
0:25 - Updated clutch shim info
2:00 - Clutch pressure plate assembly installation
7:50 - Rear output shaft assembly installation
10:05 - Sprockets and chain installation
15:40 - Oil pump, reluctor wheel, and output bearing installation
26:50 - Case saver considerations
30:50 - Mating up the case halves
51:44 - Final assembly & seals
#drshock #np246 #obstruck #obstrucks
_Disclaimer: DrShock, the alias for the human content creator for this YouTube channel, is not responsible for any damages, injuries, losses, or liabilities associated with any repairs, upgrades, or maintenance performed on yours, or any other, vehicle whatsoever. No warranty, express or implied, is made as to the accuracy or completeness of any information provided within this channel. Viewing and using the “as-is" information of this channel is totally at your own risk. Always wear personal protection equipment and follow appropriate vehicle manufacturer service manual guidelines with original manufacturer parts only when performing any repairs, upgrades, or maintenance upon any vehicle._