However, I don’t know the solutions to most of one's questions — I can guess, but that’s what it’s likely to be, a guess.
Truly, it sounds like the procedure is examining the neutral swap and will only actuate in neutral. 4Lo is supposed to operate using this method, but 4Hi need to activate the fly.
1st, your tranny will likely not change into 4Lo at 60 MPH — it truly is designed to change ONLY in the event the transmission reaches speeds of 3MPH (5KM/H) or Much less. The flashing implies the TCCM is attempting to shift from 2/4Hi to 4Lo, but it really simply cannot as a result of pace at this time staying traveled (hence why it went into 4Lo to your wife at the car wash) — it can flash for thirty seconds (I believe it’s thirty seconds) then revert back again for the method it absolutely was very last in (ie.
If I had to guess — both your encoder motor is shot, or bad wires on the TCCM. If you’re genuinely into it, I’ll article the schematics to the wiring from the method — this will allow you to trace and check points along the method to pinpoint the challenge. (I have to scan them, so it might not be now!)
The sole other thing that I can advise is often a “property fixâ€. Obviously, I have no idea what sort of issue you might be owning, but Allow’s suppose that you've dash lights and The sunshine DOES go to the 4×4 significant (or reduced) position — at this time, listen to see whether you listen to a definitive “click on-click†coming through the TCCM.
PS – I have changed the configurations to allow registered members to upload visuals/information. If you wish to upload, you should sign up. Sorry, though the spam and various crap is just ridiculous any more.
I have an ’02 Chev 2500 using a manuel 4X4 shifter. My dilemma is 4hi won’t engage. 4lo seems to do the job just high-quality, axle engages, lights to the dash arrive on, I am able to hear entrance axle actuator engaging, but Once i check out 4hi nothing at all appears to be to happen.
Effectively, Enable’s start with the obvious issue — the “leaking air†seem. Most certainly this can be a vacuum line which has possibly occur off, or is broken. You will discover a number of spots This may occur — nevertheless, hearing it While using the drivers door open is probably an indicator that it’s coming either with the mainfold, or even the 4WD vacuum swap (pictured above, Situated about the firewall).
As to the vacuum swap you linked to previously mentioned — could very very well be the issue. For $18.ninety five, it’s low cost to understand! Nonetheless, for pennies you could test it — NAPA (and doubtless Many others, like PepBoys, and so on.) may have vacuum hose connectors — male to male connectors will enable you to adhere 2 vacuum lines with each other.
Now, I don’t know if I rush right out towards the seller as there could be a number of smaller troubles that will cause this situation, based upon what that individual design/year is programmed to detect.
So, you’re expressing which the lights Never flash when trying to interact 4Hi? That’s a bit distinct, with a few more smaller matters to examine because the lights should really flash In the event the TCCM is getting the signal.
Repeat at the method in the back of each tire. So long as you use string or url wire that does not stretch, you can obtain an incredibly precise measurement in this way.[six]
If you decide on to begin a new Discussion board subject matter, it is possible to connect information to the submit. If you decide on to add an image, it will eventually make a new subject matter in my web site (which I'll then move being involved inside of your authentic post).
Stretch a string. With an assistant, have a piece of string or wire and extend it involving the lines around the entrance on the tires, even with the spindle, and evaluate the distance within the string.