Do OBD-I f-bodies (Pre-96) have Pulse Width Modulation?
03-28-2005, 03:45 PM
#1
Launching!
Thread Starter
Join Date: Jan 2004
Location: Clearwater, FL
Posts: 201
Likes: 0
Received 0 Likes
on
0 Posts
Do OBD-I f-bodies (Pre-96) have Pulse Width Modulation? Just wondering if there was any difference in the converter clutch and TCC regulator valve between the two OBD systems.
03-29-2005, 10:46 AM
#4
On The Tree
iTrader: (10)
Join Date: Jun 2004
Location: Upstate SC
Posts: 172
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by fastta
Just wondering if there was any difference in the converter clutch and TCC regulator valve between the two OBD systems.
The 4L60-E went to PWM on the TCC in early 1995. The front of the pump (behind the torque converter) will have PWM cast into the body. Most parts will not interchange between the PWM and earlier non-PWM units.
03-29-2005, 11:05 AM
#5
Launching!
Thread Starter
Join Date: Jan 2004
Location: Clearwater, FL
Posts: 201
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Dave_62
The 4L60-E went to PWM on the TCC in early 1995. The front of the pump (behind the torque converter) will have PWM cast into the body. Most parts will not interchange between the PWM and earlier non-PWM units.
03-29-2005, 01:00 PM
#6
On The Tree
iTrader: (10)
Join Date: Jun 2004
Location: Upstate SC
Posts: 172
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by fastta
So then PWM was available on late OBD-I cars it would appear? Good info about the PWM cast into the front pump. I'm assuming you mean the pump on the actual tranny itself?
03-29-2005, 07:58 PM
#7
Launching!
Thread Starter
Join Date: Jan 2004
Location: Clearwater, FL
Posts: 201
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Dave_62
Yes to both. If you pull the converter off, on the pump cover itself will be cast in large letters, PWM. Can't miss it.
