automatic trans question?
Thread Starter
Instructor
Joined: Sep 2006
Posts: 161
Likes: 0
From: Yorkville IL
automatic trans question?
I bought a 93 last week, and I'm noticing something about the trans that seems weird.
It shifts firm and at the right rpm's, downshifts on demand, and goes into gear without delay, but...
There is NO engine braking. I can take my foot off the gas and pull her to first at 30 and feel nothing, the motor just goes to idle. If I get back on the throttle, the r's come up, and when the motor is spinning faster than the driveshaft she immediately starts to pull, and is definitely in first. Take my foot off the gas, idle.
I've had 2 LT1 C4's previous, back when they were new, I don't remmeber this as normal. Is it?
It shifts firm and at the right rpm's, downshifts on demand, and goes into gear without delay, but...
There is NO engine braking. I can take my foot off the gas and pull her to first at 30 and feel nothing, the motor just goes to idle. If I get back on the throttle, the r's come up, and when the motor is spinning faster than the driveshaft she immediately starts to pull, and is definitely in first. Take my foot off the gas, idle.
I've had 2 LT1 C4's previous, back when they were new, I don't remmeber this as normal. Is it?
Race Director
Joined: Feb 2004
Posts: 12,517
Likes: 19
I bought a 93 last week, and I'm noticing something about the trans that seems weird.
It shifts firm and at the right rpm's, downshifts on demand, and goes into gear without delay, but...
There is NO engine braking. I can take my foot off the gas and pull her to first at 30 and feel nothing, the motor just goes to idle. If I get back on the throttle, the r's come up, and when the motor is spinning faster than the driveshaft she immediately starts to pull, and is definitely in first. Take my foot off the gas, idle.
I've had 2 LT1 C4's previous, back when they were new, I don't remmeber this as normal. Is it?
It shifts firm and at the right rpm's, downshifts on demand, and goes into gear without delay, but...
There is NO engine braking. I can take my foot off the gas and pull her to first at 30 and feel nothing, the motor just goes to idle. If I get back on the throttle, the r's come up, and when the motor is spinning faster than the driveshaft she immediately starts to pull, and is definitely in first. Take my foot off the gas, idle.
I've had 2 LT1 C4's previous, back when they were new, I don't remmeber this as normal. Is it?
I would suspect a seal failure on one of the 2 overrun piston lip seals.A bad teflon input shaft seal may also be contibuting. Also a worn rear stator bushing could contribute as well. Should be easy to find when it is apart.
Thread Starter
Instructor
Joined: Sep 2006
Posts: 161
Likes: 0
From: Yorkville IL
Thanks for the info. Makes sense.
How's your crystall ball Pete?
I just bought this car a week ago. It's waranteed 50/50 for 30 days. I'll have to pay half of any repairs.
Is this trans gonna fail?
Or just continue to not engine brake when I manually downshift?
Could this type of problem result from anything else? An improperly installed shift kit possibly?
What would you (or any other readers) do in my position?
How's your crystall ball Pete?
I just bought this car a week ago. It's waranteed 50/50 for 30 days. I'll have to pay half of any repairs.
Is this trans gonna fail?
Or just continue to not engine brake when I manually downshift?
Could this type of problem result from anything else? An improperly installed shift kit possibly?
What would you (or any other readers) do in my position?
Race Director
Joined: Feb 2004
Posts: 12,517
Likes: 19
Thanks for the info. Makes sense.
How's your crystall ball Pete?
I just bought this car a week ago. It's waranteed 50/50 for 30 days. I'll have to pay half of any repairs.
Is this trans gonna fail?
Or just continue to not engine brake when I manually downshift?
Could this type of problem result from anything else? An improperly installed shift kit possibly?
What would you (or any other readers) do in my position?
How's your crystall ball Pete?
I just bought this car a week ago. It's waranteed 50/50 for 30 days. I'll have to pay half of any repairs.
Is this trans gonna fail?
Or just continue to not engine brake when I manually downshift?
Could this type of problem result from anything else? An improperly installed shift kit possibly?
What would you (or any other readers) do in my position?
Thread Starter
Instructor
Joined: Sep 2006
Posts: 161
Likes: 0
From: Yorkville IL
Another test drive (paying max attention this time) shows I have normal engine braking in reverse, but not in any forward gear.
Pete, thanks for your replies. I think monday I'll have it checked out by a trans shop, then take that and your replies back to the dealer.
Pete, thanks for your replies. I think monday I'll have it checked out by a trans shop, then take that and your replies back to the dealer.
