93 Trans am Not Shifting
#1
93 Trans am Not Shifting
Car is completely stock, 1993 LT1 w/auto Trans, 65k miles. Car had been sitting in extreme cold for 3-5 days, temps warmed up to 40 so I took it out last Saturday. Drove it ten miles and it shifted fine, on the drive back a couple hours later, no overdrive for first 7 miles. Pulled over, put in park, shifted back into drive and drove last two miles home but now it only would go into second gear, and shifted at around 4k. If you let off at 4k, motor drops down to idle instantly- Not like normal where it would engine brake and slow the car down.
Tried shifting manually and got same results.
Fluid looks good and is not burnt smell- proper level. I tried driving about a half mile a couple times since- one time it wouldnt leave first, the other it shifted into second at around 4k.
I've read a lot about TV cable adjustments. It seems adjusted right. Anything else I can check??
Double posted from auto trans area but I haven't had any responses and need some advice...even if it is to set it on fire...help!
Thanks!
Tried shifting manually and got same results.
Fluid looks good and is not burnt smell- proper level. I tried driving about a half mile a couple times since- one time it wouldnt leave first, the other it shifted into second at around 4k.
I've read a lot about TV cable adjustments. It seems adjusted right. Anything else I can check??
Double posted from auto trans area but I haven't had any responses and need some advice...even if it is to set it on fire...help!
Thanks!
#2
TECH Fanatic
iTrader: (16)
Well if the car is stock and you haven't touched the TV cable then there's no reason it would lose its adjustment. It sounds as if a hard part broke. I would consider dropping the pan and looking for chunks. If it only has 65K miles and is all original, then it has sit for a very long period at some point. That's not necessarily the best for anything inudung the trans and engine. If you find out it is bad, I'd be willing to part with my FLT level 4 and 3600 stall in my 93 Z. I'm looking to possibly go th350 with a trans brake for the new engine.
#4
Sounds like another 4l60e just bit the dust. Get it rebuilt, or swap it out. If you have the cash, getting work done to your tranny is a great time to do some other work in that area like, a shift kit, higher stall converter, tranny cooler, rear main seal, replace a bad/cracked flexplate. torque arm relocation kit, etc. Whatever you do, keep us posted!
Last edited by HomeSchool; 01-15-2015 at 04:52 PM.
#5
11 Second Club
#6
Well, that sucks. No warning, no slipping, nothing and the fluid is fine. Not even some cool story to go along with its demise.
Does this transmission have shift selinoids that can be swapped out? Maybe throw in some Lucas oil miracle lube to get some miles out of it?
Does this transmission have shift selinoids that can be swapped out? Maybe throw in some Lucas oil miracle lube to get some miles out of it?
#7
TECH Fanatic
iTrader: (16)
There are no shift solenoids. It's weights, springs and a cable. Depending on where you're at and how much you want to spend, I have an FLT built 4L60, 3600 stall, and I'll even throw in the trans cooler. Trans has maybe 3000 miles and a dozen passes, all behind a stock, untuned engine. I'll even give us a heck of a deal considering what it costs new. I'm looking at a 3 speed anyway.
Trending Topics
#12
TECH Fanatic
iTrader: (16)
The springs in the governor could go bad. No it won't throw a code. The only things the 93 ecm monitors is the pressure switches that tell you what gear it's in and then the tcc solenoid. It has no control over what the trans does. Just keeps an eye on it. The governor is what controls the shift points.
#14
TECH Fanatic
iTrader: (16)
With the throttle closed you should be able to pull the cable roughly 3/4". If the car is stock the only way the cable will have moved is off the adjuster is broken. That doesn't happen but one in 100,000. I'm betting something internal broke.
The adjuster button is on the top, it's square. I usually use a screw driver to push it down if need be. It won't be very easy. It's not made to move often.
The adjuster button is on the top, it's square. I usually use a screw driver to push it down if need be. It won't be very easy. It's not made to move often.
#17
Update- I ordered a Transgo kit to see if it is stuck throttle valve.
I still think it could be broken TV cable- It does not click to adjust like all posts state.
Could be governor too.
Any way to pinpoint without just changing parts?
Does anyone have a TV cable laying around?? I'd like to try another cable.
The car has lead a easy 61k life- if anything- it has spent a lot of time sitting. I bought it from second owner with ignition (needed new opti) problems. and have driven it six thousand miles in the last 16 months.
I still think it could be broken TV cable- It does not click to adjust like all posts state.
Could be governor too.
Any way to pinpoint without just changing parts?
Does anyone have a TV cable laying around?? I'd like to try another cable.
The car has lead a easy 61k life- if anything- it has spent a lot of time sitting. I bought it from second owner with ignition (needed new opti) problems. and have driven it six thousand miles in the last 16 months.
#18
TECH Fanatic
Disconnect the cable from the throttle body. You should be able to pull on it and should spring back. If it doesn't, then the valve is stuck. Pull on it and let it snap back a couple times to try and release it.
#19
Another update-
Got the TransGo kit and before loading car up on trailer to take to friends shop to put on a lift, decided to drive it down the road one more time. Shifted just as it should around 23-2500 rpm. Drove a few more miles and it hesitated the first time it went into overdrive but after the first time it shifted in and out of OD fine.
Drove it to the shop and will do the transgo kit this week along with fluid and filter.
Got to love the F-body...
Got the TransGo kit and before loading car up on trailer to take to friends shop to put on a lift, decided to drive it down the road one more time. Shifted just as it should around 23-2500 rpm. Drove a few more miles and it hesitated the first time it went into overdrive but after the first time it shifted in and out of OD fine.
Drove it to the shop and will do the transgo kit this week along with fluid and filter.
Got to love the F-body...