5 speed automatic?
Thread Starter
Intermediate
Joined: Jun 2005
Posts: 28
Likes: 0
From: McGaheysville Virginia
5 speed automatic?
I have a 98 with automatic. My question is it shifts up 4 times. You are automatically in first gear when you take off and it will upshift 4 times with rpm dropping between each shift. I know I am not crazy because I have the same trans. ( 4L60E) in my 33 Chev. and it only shifts up 3 times. The trans, acts perfect with no slippage and seemingly normal shift points. Any ideas?
Le Mans Master
Joined: Sep 2014
Posts: 5,278
Likes: 540
From: Kelowna BC
Yep, lock-up torque converters have been around for some time now (started in the 80's?). They were made mostly to improve gas mileage; no slippage = lower RPM's once at cruising speed. If you depress the gas pedal a bit when locked up in 4th gear you can feel a slight "down-shift", this is actually the converter unlocking, not you dropping a gear.
I haven't had an auto car (wife's mini-vans only) for about 18-20 years, so if I'm off a bit forgive me.
I haven't had an auto car (wife's mini-vans only) for about 18-20 years, so if I'm off a bit forgive me.
Thread Starter
Intermediate
Joined: Jun 2005
Posts: 28
Likes: 0
From: McGaheysville Virginia
Yep, lock-up torque converters have been around for some time now (started in the 80's?). They were made mostly to improve gas mileage; no slippage = lower RPM's once at cruising speed. If you depress the gas pedal a bit when locked up in 4th gear you can feel a slight "down-shift", this is actually the converter unlocking, not you dropping a gear.
I haven't had an auto car (wife's mini-vans only) for about 18-20 years, so if I'm off a bit forgive me.
I haven't had an auto car (wife's mini-vans only) for about 18-20 years, so if I'm off a bit forgive me.
Melting Slicks
Joined: Jul 2002
Posts: 2,221
Likes: 554
From: Tallahassee fl
I understand the lock up convertor as I have had 2 different vehicles with 700r4s but it does not act that way. As I said before I have a 4l60e in a 33 Chev. coupe out of a 96 Vette ( motor too) and it does not act that way. I can feel the convertor drop when you give it gas but that is not a downshift. This thing will shift 4 times up on any kind of acceleration.
