Quote:
Originally Posted by RRPhil
Hmmm. Not wishing to be too pessimistic but, as a worst case scenario (& hopefully it will turn out that there’s a simpler and less costly electrical/electronic cause), you may have had an A-clutch drum failure. These were all the rage with the 5HP24 until the end of 2000, when a strengthened A-clutch drum was introduced, and clearly your 2002 vehicle should have the upgraded drum. However, the later drums do still occasionally fail.
The A-clutch is used in 1st, 2nd, 3rd and 4th gears so the control system immediately selects 5th gear (B-clutch & D-brake) if it detects unexpected slip across the A-clutch. Reverse uses the C-clutch & F-brake, so is unaffected by this failure.
Small parts of the broken drum would most likely end up in the sump, stuck to the magnets, if this were the cause.
We really need to determine if your transmission is failing safe to 4th gear or to 5th gear.
Phil |
I’ve had a look round on various sites and can’t find the information on how to determine whether it’s failed in 4th or 5th gear. Is it worth draining and removing the sump to check the magnets for debris. Selecting sport doesn’t show what gear it’s failed in and I assume this is because it’s goes straight to failsafe.
Again I much appreciate your input.
My wife managed to pick me up of the floor after I asked for some quotes from a few shops.
I did check the connections in the e box, dry as a bone and no sign of any corrosion on pins.
Sent from my iPad using
Xoutpost.com