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Originally Posted by NoName
This started a couple months ago before i did not have this issue. When i am in the snow, my front wheels will spin then anywhere from 1 - 5 seconds later my back wheels will kick in. If i am giving it lots gas it will make a big clunking sound when the back wheels kick in. I had the car in a transmission shop for some work(replacing torque converter) I mentioned the awd delay issue to them. They said they looked it over and said that it had to be an electrical problem that everything checked out ok when it was apart. What electrical stuff should i look for and how should I test. Or what other things can i check to try to clear up this issue.
Any suggestions would be great.
I searched the forums to look for some info but didn't find any clear answers or ways i can check electircal components.
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Hi NoName, you should put some info about your car in your locker. Makes it easier to troubleshoot, if I know the model, and any previous work.
The delay in driving the rear wheels is not an electrical problem, it is caused by a delay in the transfer valve, sending line pressure to the transfer clutch.
When the front wheels spin, the TCU detects the difference and sends a signal to the C solenoid to apply pressure to the transfer clutch. Yours is letting the front wheels spin too fast, by the time the clutch engages. That is where the CLUNK comes from. If this is allowed to continue, it will break the transfer clutch drum off the transfer gear.
There are as number of faults that can do this.
1. The transfer valve spool is sticking to delay.
2. The transfer valve reducer holes are blocked.
3. The oil sealing rings that seal the transfer oil, from the case to the clutch are worn and leaking.
The fix is to pull the rear of the box and replace the C solenoid/transfer valve, check the sealing rings for the clutch and the clutch plates.
A search of "C Solenoid/transfer valve replacement", should tell you all you need.
Harvey.
