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Yet Another 8670 That I Found. Transmission Problems?

F

FOMOCO Farmer

Member
I ran across a 1997 8670 with 7000 hrs. Here is the story. Owner bought the tractor new. Around 5-6,000 hours, the engine let go. It pitched a rod out of the side. They purchased a used motor out of an 8970. After that, they had the valve stacks on the back rebuilt. Tractor ran fine. Around the 7000 hr. mark, the transmission or clutch started slipping. Owner states you can put in a forward gear, and it will pull until you apply the brakes. Then it will stop. It will not pull at all in reverse. The tractor is not showing any codes. Dealer has quoted 20-30K to rebuild the transmission. Dealer says if one clutch pack needs rebuilding, they probably all need it. That's a reasonable assumption. the tractor is fairly cheap-p at $25,000. But with a transmission rebuild added to that, the tractor is at market value. I have a mechanic that can do the work. He thinks the estimate is a little high. What's your opinions on this tractor? I've been watching them sell at auction. 50k is about the average for these with this number of hours. I'm not buying it for resale. I'm going to use it. Thanks, and Happy New Year
 
Not enough info to make a reasonable conclusion on the trans. And I disagree, just because one clutch pack is bad doesn't mean they all are.

I would think it would be showing codes if it really was slipping. My next test would be the PTO, to see if it drives under a load on the dyno. If it does, it's not the slip clutch in the flywheel.
 
I agree more diagnostic work is needed.

Having said that for me non-runners have to be bought dirt cheap because what the previous owner says usually is NOT the whole truth. I always assume the worst case scenario (ie every wear part in the trans needs replaced, possible some hard parts, etc) because when you open it up you need to be priced for the worst.

Case and point a customer brought me a tractor he just bought that is "field ready and runs good" but also "runs warm". Original seller told him that it ran warm because it needed a fan shroud. Well turns out the head gasket is cooked. The block is also eroded on the edges of the cylinder walls. So the block needed decked, upon tear town the seller must have ran it like that a while with coolant in the oil as all the rod and main bearings were shot. I must admit though for a motor with junk bearings and a blown head gasket it ran really good and had great oil pressure. But a simple "fan shroud" turned into an out of frame engine overhaul and the customer has way more in it that the tractor is worth now.
 
This is perhaps a question of philosophy more so than economics.... If the present owner can confidently repair the tractor and sell it for your estimated market value, why doesn't he?
Because he probably can't.
Buckets of bolts need huge discounts, not large discounts. Look on govdeals at what some stuff sells for. Drop another zero. With the numbers you present, and a huge round of luck, you might come out of it ok. With my luck it would need every clutch pack and some hard parts, then a rear planetary and hydraulic pumps next week. Unless you really, really know what's wrong and he doesn't.

Rod
 
All his other machinery is green. The nearest blue dealer is 2 hours away. I'm sure that has a lot to do with his decision. Also they have poured a lot of money into this tractor in the way of a motor, rebuilding valve stacks. Your luck is about like mine.
 
I agree with you. I would think it would be showing codes. I'm nowhere as experienced as you and the others commenting on these tractors. I'm learning the hard was! I'll ask if the pto will pull under a load. Logistics are a big problem. This tractor is 675 miles from me.
 
Any time I see one of these tractors priced cheap, I take notice. They have a reputation of being a good tractor even with 10K+ hours on them. I've seen these tractors bring more than the next models that came out after them. Around here they are compared with the boxcar Magnum and the 55 series Deers.
 
Those tractors were light years ahead of the boxcar Magnums and 55/60 series Deeres. It was too bad that the support for the series was yanked soon after they came out.
 
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