|09-30-2009 08:17 PM|
|CincyMuscle||Ok thank you, I decided against taking in this vehicle as the above problems minor or not were too much of a risk since I really don't know enough about the 350 trans to know what I'm getting into.|
|09-30-2009 01:00 PM|
Hard to diagnose without seeing it. As Sqzbox stated above, if it has a Full Manual Valvebody it will only shift by moving the shifter handle and wont have a Detent cable. Others will retain Automatic & Manual shifts.
Since you said it would downshift when you gave it more than 1/2 throttle it must have a Detent cable.
There are also Trans that have air or electric shift solenoids that are activated with RPM switches.
|09-29-2009 03:46 PM|
|09-29-2009 10:35 AM|
|sqzbox||I had a 727 in my dart with reverse/shift, manual shift vave body (sox and martin). In drive (old first gear posistion) it would only shift auto from a stop. Any downshift would have to be manualy shifted to include what you call passing gear. That's why they call it manual shift. There was no detent/downshift cable! Don't know if this applies to the TH350 though, that's just the way it was in mine.|
|09-29-2009 09:58 AM|
This is very difficult to understand. I'll give it a try.
When an Automatic trans with the stock Valvebody is converted to Manual Shift the Valvebody is modified or replaced with a Manual Valvebody. If it has an electric Transbrake it will have a Solenoid to activate the Brake.
It sounds like the Detent/Downshift cable is adjusted too tight. It should downshift to 2nd gear from 3rd at around 3/4 to Full throttle.
The problem with it getting stuck in 2nd may be the Detent valve in the valvebody sticking/binding or other shift valves in the valvebody sticking/binding.
Called Detent cable, Kickdown cable, Passing gear cable.
|09-29-2009 08:41 AM|
Turbo 350 Trans Shift/Slip issues
Hi, I'm new here and will hopefully stick around if this deal on a 70 Monte Carlo goes through. That being said, I wen't to drive the car in question 350 engine and 350 trans and what I had happening was this:
The owner said the car was once an automatic converted to manual shift via a solenoid that selects the gears so I would go from L1 to L2 to D as you would from 1st 2nd to 3rd.
So I head out for a test drive and it starts not shifting into a lower gear when I go to L2. I learn this is because my revs aren't high enough so I correct that and it shifts OKAY. I say it like that because almost every time I shifted into 2nd(L2) it would jerk very hard chirp the tires and 3rd(D) would as well just no tire chirping. Well as I start driving on the highway everything is going good until I give it more than a half throttle and it starts spitting smoke/backfiring when I let off the gas. Then it just cuts out on me all and all and I have to wait for the owner to come with a new battery because apparently the alt was shot. So after we get the new battery I start following him home.
On the way home I notice if I give it more than half gas in 3rd(D) it shifts into a higher gear and gets stuck there until I shift down into 2nd(L2) and then back into third. Which is annoying because I have to slow down to about 30 to shift back into 2nd without im sure locking up the rear wheels.
Anyways I like the car and the engine runs strong as ever minus the smoke and the backfire which I'm not sure can happen because of a bad battery but was gone after the new one was put in. So I would like to know what this could possibly be given the description. I know the description was not perfect and I know relatively little about these Chevy's since I normally have Mopars(please don't shoot me). So I thought I would ask some of you as you would know better than I. Thank you for your time.