4R70W Transmission failure? | Ford Explorer Forums

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4R70W Transmission failure?

JChrisMarion

Active Member
Joined
July 18, 2006
Messages
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City, State
Lakeland,FL
Year, Model & Trim Level
1997 Explorer 5.0 AWD
97 Explorer AWD 5.0L, 160k miles.

Two weeks after replacing the front axle for problems, now this. I was traveling on the Florida Turnpike (speeds of 70mph) with a temperature of
51* outside Friday night heading to my sister inlaws house to watch the kids for the weekend. As we exit off onto the off ramp we come up to the traffic light, when it turns green for us to go I lightly press the pedal move about ten feet and a loud bang occurs. Forward motion ceased to exist at this time, along with reverse.
If you put the transmission into drive or any of gear it sounds like you dropped marbles into a blender and turned it on. You can also push it forward or backwards with it in park. While waiting for a tow truck to take the Explorer back home (92 miles) and get our other car, I thought maybe it was the transfer case at first. It still could be, but I highly doubt. The kicker was when I checked the fluid and it was black. And it wasnt when I left, unlike most people I check everything before going on a long distance trip. It also was flushed 15k miles ago.
I probably will not be dropping this thing myself since I am moving from this house in two weeks. As you can tell, this is very bad timing for me. With the moving and wedding in two months my wallet is very thin. I am hoping to get some help and ideas on wether this is going to be a major repair or is this a non expensive repair? I just got home and I have been thinking about what it could be, also on wether to have it repaired versus replacing the whole unit. Trying to weigh the costs, but without knowing whats wrong internally I cant estimate what would need to be done. I have never encountered this transmission breaking something like that internally.

Any tips, ideas, opinions would be great. Remember, I cannot take this apart at my current house, I am moving. I would prefer not to do it anyways on the ground. Thank you.
 



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My initial hypothesis was transfercase, but a good variable throwing me off too was the fluid. I couldnt remember friday night when we were sitting wether my transfercase is gear driven or chain driven.

I am also trying to see if I can find an exploded view of the transfer case, in hopes of seeing what could havee gone wrong inside. If it is it.
 












Had it towed to my buddies shop, its the transfer case. My original hypothesis. So, to replace it with a remanufactured unit it starts at $1500 and up. A used transfer case with 60k miles is $800. To rebuild this plus labor to do it is a little more than the used unit. That doesnt included remove and install labor either.
His shop owner said he would do it all with the used unit for $1000 out the door, wave the towing anddiagnostic fee. Plus he will give me a one year 12k mile warranty on the case and labor. Not bad since no where else will give over 30 days used. Reman case is 3/36k. The cheaper reman's are not instock and would have to be built, about 1-2 weeks. The $2,000 units are instock, go figure. I have called all over Florida today with nothing any better and this being my daily driver I dont have time to wait.

So for my best bet I am gonna go with the $1000 option. Along with flushing the transmission. Opinions before I give him the go ahead in the morning?
 






I know where there is a case for $200 plus shipping ( I'd guess $50 ) You can install this yourself. It is entirely doable by an average mechanic. I can give you some pointers if you want to do it yourself.

EH... I just saw yours is a 97, is it a late or early 97? If you have a speed sensor in the t case, it my complicate things slightly, nothing that can't be handled.
 












Build date is 2/97. Only problem with that is getting in contact with him, sending money via paypal, confirming his end on the money, then shipping time. I dont have another vehicle that is street driveable besides my car. She drives the Explorer daily, so she uses my car now. She drops me off and picks me up. My job I have to have reliable transportation everyday at anytime of day. Kinda screwed at the moment, thats why I am in a pinch.
 






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