Reverse slow to engage
Thread Starter
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Senior User
Joined: Jan 2011
Posts: 362
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From: SF Bay, CA
Reverse slow to engage
New to me 190k miles on my 2000 Excursion RWD. Reverse is slow to engage.
Changed transmission oil w/ Mercon V and replaced filter. No change.
What would cause this?
What is the fix?
Thanks.
Changed transmission oil w/ Mercon V and replaced filter. No change.
What would cause this?
What is the fix?
Thanks.
Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 25
From: Damon (South East Texas)
Reverse is a combination of clutch packs filling with fluid. Extra clearance in each of these packs will cause a delay due to the time it takes to fill them for engagement. Any slippage? How long are we talking about? A few, or several, seconds?
Postmaster
Joined: Jun 2010
Posts: 2,555
Likes: 9
From: Longview, TX
Is it only reverse, or is it just happen to show up in reverse because that's the first gear you pick in the morning? Some torque converters have a valve that can leak allowing the fluid in the TC to drain back to the pan. After the truck is cranked, it takes a little while for the TC to fill back up. If I recall correctly, that delay will show up in forward and reverse, but only when it's been sitting for a while (can vary from overnight to several weeks depending on how bad the valve is leaking).
Thread Starter
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Senior User
Joined: Jan 2011
Posts: 362
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From: SF Bay, CA
No slippage.
Only happens in reverse.
When I shift into reverse, it takes about 1 -3 seconds. Shifts into reverse normally but acts like it's in neutral. If I'm not on the brake, the truck will roll until reverse engages.
Tends to happen more when the tranny is up to operating temps / warm. When cold, it doesn't seem to happen - or at least it doesn't take as long to engage.
Thanks.
Only happens in reverse.
When I shift into reverse, it takes about 1 -3 seconds. Shifts into reverse normally but acts like it's in neutral. If I'm not on the brake, the truck will roll until reverse engages.
Tends to happen more when the tranny is up to operating temps / warm. When cold, it doesn't seem to happen - or at least it doesn't take as long to engage.
Thanks.
Fleet Mechanic
Joined: Jul 2005
Posts: 1,800
Likes: 52
From: Southern Colorado
Mine takes ~2 sec when warm to engage in reverse. If you rev the engine, it (naturally) engages faster and with a bang. Have to remember to be patient. Mine has been rebuilt by a shop with no particular performance parts (standard rebuild).
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Logistics Pro
Joined: Aug 2009
Posts: 3,609
Likes: 324
From: Arizona
Mine takes about 2.5 seconds normally, and a bit more after sitting for a week or more. However when making a U-Turn on a busy street that is too narrow to do it in one swoop it takes longer, an eternity to be exact.
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Thread Starter
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Senior User
Joined: Jan 2011
Posts: 362
Likes: 0
From: SF Bay, CA
Maybe I should time it. My previous truck shifted right away. This one takes far longer. Makes maneuvering with the trailer a challenge.
Thanks.
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