awd astro

sean

sean

Member
ok guys. i need help my wife van it is throwing a code po753a. which is a shift solenoid. my ? is where is it located. it is a chevy astro awd conversion van with a 4.3 and a 4l60e behind it
 
U

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I suffer from boost envy
Re: awd astro

Yep, atsg manual will tell you which is where
I'd think the code would say which solenoid it is.
But I've yet to play with an obdii- yet.
 
NecroWolf

NecroWolf

lost marbles member
Re: awd astro

there's whole string of test that can be done to test it. i'd start by check for a harness rubbed through, pretty common on these where the wires run over the top of the tranny.

am i blind or didn't DaveP have a post here?
 
sean

sean

Member
Re: awd astro

ok i replaced A and B solenoids. heres my problem know the van won't shift into 2nd gear now. before i changed it the van had no power in 1st but would shift into 2nd and 3rd was fine as well as the overdrive. somebody please help!!!!!!!!!!!! 1st gear know has power with the new solenoid just won't change gears.
 
sean

sean

Member
Re: awd astro

DaveP said:
Are you positive it's stuck in first? (If it's in third, you have power issues to the trans).You may have disturbed the Pressure Switch Assembly and / or wiring while you were working on the solenoids. If the PSA is sending the combo for manual low, it won't shift regardless of manual valve (shifter) position. You almost need a scan tool to interpret the PSA.

And I could be mixed-up. Astro vans have a switch assy on the outside of the case, around the shift-shaft beginning in about 95 This may take the place of the PSA on the earlier 4L60e. I just don't work on enough of them to know all the combos.....

But no shift out of first sounds like a PSA or shifter switch issue.
Click to expand...

the code came up as shift A solenoid. i changed both of them and now it is stuck in 1st gear and won't shift into 2nd gear. i'm going to try and change it one more time maybe by chance i got a f*** one.
 
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