94XRolla

i have a 94 z28 with the 4L60E trans. 4 speed auto with 1st gear lockout removed... recently the trans was professionally flushed and everything was fine for about a week, now it has a hard shift from park or neutral to forward drive gears, reverse is fine, all gear seem to shift fine when in motion until its time for the drive to overdrive shift, it tachs out on the interstate and doesnt go into overdrive, but when its in drive not tach'd out, and you floor it, it downshifts ok... i have read its possibly a shift solenoid that runs off vaccuum pressure or possibly the pressure block itself being stuck? or even the torque converter......anyone with these same problems or know anyone with em and a solution or troubleshooting checklist? or would i be better to just take it to a transmission shop and have it looked at? only thing i can really find out beyond that is everyone saying junk the 4L60E and do a custom TH-350 swap with fabricated overdrive gear..dont have that kind of cash for that, or even a new transmission seeing how they run average $1200 not including labor.. need help!

slowassta

if im not mistaken the 94+ are computer controlled shifts..

MIGHTYMOUSE

i'd take a look at/change the fluid..

fresh built trans can have a lot of debris flying aroud at first, could have something hung up.

to make 1st gear useable shouldnt have done anythign in the trans, only in the shifter.

any trouble codes?

94XRolla

havent been able to have it scanned yet... if i can get my hands on a scanner and can get some codes, ill post em

blackhorse5.0

the check engine light would come on if you were throwing codes, but why do you drive that corolla if you have a z28?

ScrmnLT1IROCZ

how many miles are on the tranny? Alot of these trans flush machines are not recomended on high mileage trannys because the higher mileage ones tend to have trash and other crap in them and the flush will break it down and get crap cought up in the valve body. like mightymouse said the 1st gear lock only has to do with the shifter. As far as the hard shift while putting it into gear i wouldnt worry about but if it not going into overdrive you could have goten something caught on the valvebody from the flush. You can try flushing it again and see if it fixes it but keep in mind it could also cause more problems. But like mightymouse said check it for codes. That could tell you the whole problem.

H8mportzNmySS

PM me if you want to get it fixed and ill give you the name of a good shop!

94XRolla

ok, had it scanned, the car produced NO codes whatsover... not sure if thats good or bad lol... anyways the mechanic said hed have to pull the tranny and open it up to see whats going on..... he gave a rough estimate of between 1200 and 1600 to fix it... checked into jasper ... they want around 2200 for remanufactured....... so i guess its basically gotta be rebuilt... assuming thats the case anyone who knows of someone who does reliable work in the hampton roads area and can beat the 1200 price, email me!!!!!

Rosco The Iroc

See LJ Wood @ Afforable Tranny on Indian River RD.

ScrmnLT1IROCZ

I know of a shop that may do it for alittle less and hook you up for a performance rebuild. Let me talk to the guy to see what he sais and ill get back with you if your interested