cold transmission slipping
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
C6 or E4OD?
If it is a C6 make sure the vacuum line is good running to the modulator on the rear of the transmission. Could also be a failing modulator.
If it's an E4OD then check for codes.
If it is a C6 make sure the vacuum line is good running to the modulator on the rear of the transmission. Could also be a failing modulator.
If it's an E4OD then check for codes.
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
Probably an AOD being a 87 with 6cyl.
My AOD is on it's way out. In the frigid weather it will drop in gear but as soon as it tries to shift it hits neutral. Leaves me stranded for a few moments then goes and works fine the rest of the day(as long as it stays warmed up). Was told by buddy with transmission shop that it basically is on it's way out. 160K miles. Trying to make it through winter and put a 5spd in it. I did a service at 80K miles and again about 5K miles ago.
My AOD is on it's way out. In the frigid weather it will drop in gear but as soon as it tries to shift it hits neutral. Leaves me stranded for a few moments then goes and works fine the rest of the day(as long as it stays warmed up). Was told by buddy with transmission shop that it basically is on it's way out. 160K miles. Trying to make it through winter and put a 5spd in it. I did a service at 80K miles and again about 5K miles ago.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
. In the frigid weather it will drop in gear but as soon as it tries to shift it hits neutral. Leaves me stranded for a few moments then goes and works fine the rest of the day(as long as it stays warmed up). Was told by buddy with transmission shop that it basically is on it's way out.
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
I did screw up and put Mercon 5 in it instead of std fluid. I forgot the AOD doesn't need the fancy stuff like the 4R takes.
Seems the forward sprag goes into neutral for some reason? Just free wheels. Usually have to put it back in park and then back into D. It then usually goes forward, but you can't flog on it as it will slip. Seems the pressure doesn't build enough(or is leaking by) enough to not hold the clutch tight. Give it a couple miles and it works fine.
Still getting rid of the POS AOD.
Seems the forward sprag goes into neutral for some reason? Just free wheels. Usually have to put it back in park and then back into D. It then usually goes forward, but you can't flog on it as it will slip. Seems the pressure doesn't build enough(or is leaking by) enough to not hold the clutch tight. Give it a couple miles and it works fine.
Still getting rid of the POS AOD.
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