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73-87 Chevy _ GMC Trucks => 4 Wheel Drives => Topic started by: Sprinkler-Man on June 01, 2016, 11:26:11 pm

Title: Transmission and transfer case bolte
Post by: Sprinkler-Man on June 01, 2016, 11:26:11 pm

Anyone know what kind of bolts the adapter takes to mount a 700R4 to an NP241C transfer case?
Just had these rebuilt and they were missing them. Can I use the bolts from my TH350 to mount the 700R4 to the block? 

Title: Re: Transmission and transfer case bolte
Post by: LTZ C20 on June 02, 2016, 01:46:16 am

Yes on the bell housing to engine block bolts, make sure to torque to spec. As for t-case to transmission, I have no idea sorry.

Title: Re: Transmission and transfer case bolte
Post by: hatzie on June 02, 2016, 03:05:55 am

The bellhousing bolts are threaded into the block.  Use the same ones.

From the 85-91 parts books.  Download your own copy from my signature...
#2 Adapter to transmission;

• 11500931 Qty. 4, BOLT , HEX (M10 X 1.5 X 35 10.9 Property Class)

#4 Adapter to transfer case; 

• 11513606 QTY 6, BOLT , HEX FULL THREAD (M10 X 1.5 X 35 10.9 PS)
• 11509161 Qty 6, WASHER , FLAT (10.8 X 18.54 X 1.95 ,1050, PS)

GM called out 10.9 Property class bolts.  I would NOT recommend using lighter class 8.8 bolts.

There's a torque brace (#14) in the parts blowup that you don't want to leave out. 

• 10 & 20 series is 14020856. 
• 30 series is 14068719

You'll need the transmission to adapter seal #5 and the transfer case to adapter gasket #1 if you don't want leaks.  MD8 is the RPO for the TH70R4/4L60.

• 1358899 SEAL , ADAP TO TRANS (4.318)(W/MD8 )
• 15642512 GASKET, TRFER CASE ADAP (K/V3)(W/M20) (K/V1 ,2 ,3)(W/MD8)(1989 -91)(W/MT1 )(1991)  NP241-C

(http://www.gmpartswiki.com/getbigpage?pageid=56919)
(http://www.gmpartswiki.com/getbigpage?pageid=56927)

Title: Re: Transmission and transfer case bolte
Post by: Sprinkler-Man on June 04, 2016, 11:06:00 am

Thx, just what I needed .