hughesm

I have a 1988 4+3 tran.it has been running great considering 94000 miles.a little while ago when i would push the button on the shifter to engage or disengage the od unit it would not work.sometimes i had to push it several times to get it to work.now i can push on it till doomsday and nothing happens.the fluids are all up to proper levels.when i shift the car into 2nd gear it goes into overdrive,if i step on it,it will downshift into regular 2nd gear and go,if i let up on the gas or shift into 3rd it goes right into od again. any thoughts would be helpful. i think it is the switch.if it is has anyone ever changed one and how hard would it be to do. would really appreciate any help you can give me on this problem thanks mike

rodj

If you can solder you can fix for $4
http://www.radioshack.com/product/in...ductId=2062541

If not it will cost you $70
http://www.ecklers.com/corvette-over...late-1988.html

Switch is mounted on shifter shaft at base under boot.
Carefully prise out button, remove metal T locking **** in place, undo **** , remove boot
Unbolt old switch and fit new one.

AGENT 86

http://members.shaw.ca/agent86/OD%20Switch.pdf

Alf812

Does anyone know where I can purchase the switch at the bottom of the shifter?
Thanks

black88z51

There is/was a link before to some electronics website that sold the similar switch real cheap. Myself I went with the radioshack one and problem was solved.

vetteoz

Any Mini Momentary Switch ( 3 amp ) will do the job
MUST be momentary operation ; not ON/OFF type

Radioshack #275-1549 or similar

This will require soldering in , the original replacement from Ecklers linked above appear to be no longer available

artvette

Exact part is Tyco #1825040-2 (switch only)

Mouser Electronics pn 506-MPA106F04
(800)346-6873

SPDT MOM Panel Mount

Original GM complete harness #14087693

I have both but am holding on to them.

You might get away with backing out the adjustment by a turn.

Alf812

Thanks Guys or Gals,
I went online and found one at Ecklers. Said it was in stock and shipping. Thanks for your help!

pmihaltian

Here is a pretty good How To write-up for you.

envirotrans

???? Is the switch a make or brake type

Alf812

Thanks for your help pmihaltian.
The link will be helpful when I go back together with it.
I'll let you know how it goes when the part arrives.

krmiche

does anyone know where you can buy the pressure switch that goes inside the transmission on the 4+3 1988 corvette.

vetteoz

http://forums.corvetteforum.com/c4-t...ing-parts.html

Alf812

Thanks pmihaltian. Sorry I forgot to get back with you. Got the part in and it worked great. Thanks again for your help!!!