PO757 Code selinoid 'B" malfuncion

PO757 Code selinoid 'B" malfuncion

Postby Rinny [OP] » September 10th 2019, 2:42am

So I am running the beaches, lots of soft sand, have never had to air down with lo range and posi Front and rear difs. Running a NP236 with an alternate shift pattern for 4lo, SES light comes on today and it seems like the trans is slipping. Clear the code and it is fine, Put it in 4 lo and the light comes back on. Take It out of 4lo and switch to 2H, switch To he standard shift pattern and it seems like the trans is slipping again, Clear the code and all is well in 2H. Does anyone have input on if it is the solenoid, or faulty infernal wiring for he solenoid?
03Astro AWD/4WD
5.7L+30,SS dual exhst,mild cam,Efan,CAintake
2100lb Springs,Jour Hangers/Shackles,3" Alum Blocks
TorsenDiffs,3:73'S,VettServo
NP236TC
Dual Piston Rear Calipers
GY DTrac 235/85/R16
ARB &/Custom bumpers
2x6x1/4 Rockrails
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Rinny
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Alias (AKA): 5.7L, NP236, 3"Lift
Van Model Year: 2003
Van Make/Model: Chevrolet Astro
Extra Info: 5.7L NP236

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Re: PO757 Code selinoid 'B" malfuncion

Postby Rinny [OP] » September 10th 2019, 2:59am

Going to have to drop the pan either way so I will do the filter, and why not test for continuity and replace the solenoids, rite?
03Astro AWD/4WD
5.7L+30,SS dual exhst,mild cam,Efan,CAintake
2100lb Springs,Jour Hangers/Shackles,3" Alum Blocks
TorsenDiffs,3:73'S,VettServo
NP236TC
Dual Piston Rear Calipers
GY DTrac 235/85/R16
ARB &/Custom bumpers
2x6x1/4 Rockrails
Original Poster [OP]
User avatar
Rinny
V8 Swap Achievement
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Firing on 3 Cylinders (L2)
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Years of Membership: Rinny has been a member for 5 full yearsRinny has been a member for 5 full yearsRinny has been a member for 5 full yearsRinny has been a member for 5 full yearsRinny has been a member for 5 full years
Posts: 1341
Topics: 57
Images: 6
Joined: December 2015
Alias (AKA): 5.7L, NP236, 3"Lift
Van Model Year: 2003
Van Make/Model: Chevrolet Astro
Extra Info: 5.7L NP236

Re: PO757 Code selinoid 'B" malfuncion

Postby albrow100 » September 10th 2019, 4:23am

I’d replace the solenoid and the internal harness while your in there
Both are cheap enough
albrow100
Firing on 2 Cylinders (L1)
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Re: PO757 Code selinoid 'B" malfuncion

Postby Rinny [OP] » September 10th 2019, 11:23am

albrow100 wrote:I’d replace the solenoid and the internal harness while your in there
Both are cheap enough

Thanks. did no realize the harness is a plug and play, and that could be the problem seeing the scanner keeps bouncing back between reading a code and no codes.
03Astro AWD/4WD
5.7L+30,SS dual exhst,mild cam,Efan,CAintake
2100lb Springs,Jour Hangers/Shackles,3" Alum Blocks
TorsenDiffs,3:73'S,VettServo
NP236TC
Dual Piston Rear Calipers
GY DTrac 235/85/R16
ARB &/Custom bumpers
2x6x1/4 Rockrails
Original Poster [OP]
User avatar
Rinny
V8 Swap Achievement
V8 Swap Achievement
Firing on 3 Cylinders (L2)
Firing on 3 Cylinders (L2)
Years of Membership: Rinny has been a member for 5 full yearsRinny has been a member for 5 full yearsRinny has been a member for 5 full yearsRinny has been a member for 5 full yearsRinny has been a member for 5 full years
Posts: 1341
Topics: 57
Images: 6
Joined: December 2015
Alias (AKA): 5.7L, NP236, 3"Lift
Van Model Year: 2003
Van Make/Model: Chevrolet Astro
Extra Info: 5.7L NP236

Re: PO757 Code selinoid 'B" malfuncion

Postby Rinny [OP] » September 10th 2019, 11:27pm

I am also going o have the tranny flushed rite b4 I drop the pan and change the filter. Running Valvoline max life synthetic.
03Astro AWD/4WD
5.7L+30,SS dual exhst,mild cam,Efan,CAintake
2100lb Springs,Jour Hangers/Shackles,3" Alum Blocks
TorsenDiffs,3:73'S,VettServo
NP236TC
Dual Piston Rear Calipers
GY DTrac 235/85/R16
ARB &/Custom bumpers
2x6x1/4 Rockrails
Original Poster [OP]
User avatar
Rinny
V8 Swap Achievement
V8 Swap Achievement
Firing on 3 Cylinders (L2)
Firing on 3 Cylinders (L2)
Years of Membership: Rinny has been a member for 5 full yearsRinny has been a member for 5 full yearsRinny has been a member for 5 full yearsRinny has been a member for 5 full yearsRinny has been a member for 5 full years
Posts: 1341
Topics: 57
Images: 6
Joined: December 2015
Alias (AKA): 5.7L, NP236, 3"Lift
Van Model Year: 2003
Van Make/Model: Chevrolet Astro
Extra Info: 5.7L NP236


 
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