NP233 electric shift to manual shift swap

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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Re: NP233 electric shift to manual shift swap

Post by Astrophysics »

Np231C in 2003 Astro
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Np231C
Np231C

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Re: NP233 electric shift to manual shift swap

Post by Astrophysics »

Hi,
Installed drive shafts and VSS speed sensor.
Tomorrow splice in hose for t case vent . 5/16" hose.

Still need to get a micro switch to install near shifter in 4 Lo.
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Drive shaft installed
Drive shaft installed

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Re: NP233 electric shift to manual shift swap

Post by Astrophysics »

Hi,

Today, install vent hose.
Look for micro switch at Frys Electronics to mount underneath by shift lever.

AP
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Np231C needs micro switch near lever
Np231C needs micro switch near lever

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Re: NP233 electric shift to manual shift swap

Post by Astrophysics »

Hi,

Got shifter boot $18 from JEGS in Ohio, it is Jeep 1977 style.
I like the extra flat section of rubber which I can secure to floor or seat pedestal to keep the boot in place.

AP
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Shift boot near drivers seat.
Shift boot near drivers seat.
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Re: NP233 electric shift to manual shift swap

Post by Wiley »

:bounce:
2guys1truck.com: 2004 AWD Chevy Astro from California to Colombia!
want to follow along, or think our paths may cross, Facebook kjswiley

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Re: NP233 electric shift to manual shift swap

Post by Astrophysics »

Hi,

Thank you for invite to social media. I have avoided Facebook,etc. I know it is convenient but I don't like big data company tracking me.

AP

Got the vent line connected to t case and wrapped the cable shifter near exhaust with some very good heat tape from Pep Boys.''

Purchase a nice Philmore brand heavy duty micro switch from Frys.
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Micro switch will activate when in 4 Lo
Micro switch will activate when in 4 Lo
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Wiley
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Re: NP233 electric shift to manual shift swap

Post by Wiley »

Thats just my sig sorry. I was :bounce: cause I like what I am seeing in this thread.
2guys1truck.com: 2004 AWD Chevy Astro from California to Colombia!
want to follow along, or think our paths may cross, Facebook kjswiley

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Re: NP233 electric shift to manual shift swap

Post by Astrophysics »

Hi,

Here is photo of the HD micro switch mounted with 6-32 machine screw and nylon lock nuts to a 3"X 7" bent Simpson Strong Tie.

AP
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Micro switch from Frys Elec HD 15 amp $6<br />Is activated by contact with the 1/4&quot; bolt at shift lever.
Micro switch from Frys Elec HD 15 amp $6
Is activated by contact with the 1/4" bolt at shift lever.

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Re: NP233 electric shift to manual shift swap

Post by Astrophysics »

Hi,

Micro switch installed to be activated when 4 Lo selected. The new larger 4 mm aluminum skid plate for the t case should protect the micro switch. I did coated terminals with clear silicone seal.

AP
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Micro switch 4 Lo detector on no231C linkage
Micro switch 4 Lo detector on no231C linkage
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Re: NP233 electric shift to manual shift swap

Post by dunedog »

Can't believe how clean the underside is.... :yikes:
1999 LS AWD 3" Lift,4.10's,Snowplow,9500lb Ramsey winch

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Re: NP233 electric shift to manual shift swap

Post by Astrophysics »

Hi,
Mostly freeway miles. But, I hope to do more dirt and sand with the low range t case.
Also,
Installing skid plates for tranny and engine oil pan.
Found a easy way to install 44" cross bars to the sub frame.
Uni strut 4 hole Clevis fittings and Uni strut U channel clamps , and some grade 8 hex bolts.
The neat trick to snug the fittings into the 3" round OEM hole is to use impact wrench to spin the nut since can't get a wrench on the head of bolt, just the flat screw driver.
Used Uni strut fittings which fit perfectly in the OEM 3" access hole in sub frame.

Using 1 1/4" X 1 1/4". Steel box tubing 1/8" wall for cross bars. One bar fits at forward side of the 4L60 E tranny, the other bar fits by engine oil pan.

Will use 4 mm aluminum skid plates.

AP
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Uni strut fittings for cross bar to support skid plates
Uni strut fittings for cross bar to support skid plates

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Re: NP233 electric shift to manual shift swap

Post by Astrophysics »

Skid plates for 2003vAWD Astro
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44 1/2&quot; length of 1 1/4&quot; X 1 1/4&quot; steel box tubing 1/8&quot; wall attaches to Uni strut 4 hole Clevis with 7/16&quot; X 3 1/2&quot; long grade 8 bolts.
44 1/2" length of 1 1/4" X 1 1/4" steel box tubing 1/8" wall attaches to Uni strut 4 hole Clevis with 7/16" X 3 1/2" long grade 8 bolts.

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Re: NP233 electric shift to manual shift swap

Post by Astrophysics »

Hi,
Connected the 4 LO sense signal jumper pigtail and female socket to PCU green J2 pin 16 as shown in the excellent photos and write up from this site.
This weekend I hope to try 4 LO and confirm that it allows shifting thru all 4 gears when in 4 LO range.


AP.
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Green j2 pin 16 with female contact installed f[or the 4 LO signal
Green j2 pin 16 with female contact installed f[or the 4 LO signal

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Re: NP233 electric shift to manual shift swap

Post by Astrophysics »

Hi,
Got the insertion tool and DB9 female to RJ45 adapter at Frys Electronics.

AP
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DB9 female contact and orange pigtail harvested from adapter
DB9 female contact and orange pigtail harvested from adapter

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Re: NP233 electric shift to manual shift swap

Post by Astrophysics »

Hi,

Yippee! The 4 LO sense signal works! I found a bit of a dirt road and tested it today. The transmission shifted from first to second, then I ran out of dirt. But it was a great thing to know the PCU green j2-16 signal getting GND from micro switch when 4 LO is selected.

Now for some real dirt trails.

AP
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