Monday, December 23, 2013

Piston Slap: Fanning the Dakota’s Flames?

TTAC commentator Ian Anderson writes:

Hi Sajeev, I have something here for you and my fellow B&B to ponder over,

Back in May I bought a rust-free 1999 Dodge Dakota Sport (Extended cab, 3.9L Magnum V6, 5speed AX-15 manual, 2WD, 3.21 8.25″ open axle) for $2000 from a guy in South Philly. I bought it so I could take my rusty 1992 Dakota off of the road so my dad and I could fix all of the rust on it. Well now the '92 is on the road (and growing more rust) and the '99 is sitting on the street with a supposed ticking time bomb in the trans tunnel. When I bought the truck I was told by the previous owner's mechanic that the throwout bearing was going out and would need replaced soon. Lo and behold, the next day while beating around in it I had to call AAA when I could no longer shift it (and when the clutch suddenly didn't do anything, made stopping interesting). $600 later I had a whole new clutch kit and was on my way.

Now fast forward four months, myself and the Miss (not Mrs.) are coming back from dinner in the middle of August when it suddenly stalls while shifting gears to make a turn- shifting into third from fourth specifically. I chalk it up as my error and keep going until it does it three more times five miles down the road, then being accompanied by a soft BANG and me wrestling it to the side of the road. We made it home by driving in second gear with the flashers on. Now it will behave itself most of the time, but every so often going uphill it will become hard to shift, stall or get stuck in third, which makes it interesting trying to get the little 3.9 to motivate 4000 pounds with a line of traffic behind you. My mechanic ripped it back apart to check the clutch out, everything was fine. He's stumped and telling me to drive it local until it blows, my dad says the transmission is shot, and the forums are all over the place with it saying it's the trans, the clutch or that I can't drive stick (the 30K I put on my '92, including learning manual, beg to differ).

Now the question- What do I do with the truck? I love driving it since it handles great, has good brakes and will leave most "Ricer/tuner" cars in the dust even with the aforementioned 175HP 3.9 hauling 4000 pounds. But on that subject, I do have a stronger, newer, 500mile NV-3500 transmission in the shed from the same era Dakota that I snatched up for a bargain, and I've been thinking the truck could use a few more ponies under the hood. Do I:

  • Get a junkyard (with a warranty) trans or a rebuilt unit and just have it throw in
  • Use the later, heavier-duty trans I have with either the stock V6…OR…
  • With a V8 swap. Low mileage 5.2L Magnum V8s are plentiful in my area. Thankfully Chrysler made it a bolt-in job since it was a factory option.
  • Slap myself for the last two options
  • Throw it on Craigslist to get what I can for it and move on

I'm sure you and some of the B&B have been in the "Okay it's broke, do I fix it to stock or upgrade" boat before and have some insight into this, especially you with half of your stable being occupied by older Detroit iron.

Thanks again Sajeev and the B&B!

Sajeev answers:

If you are considering slapping yourself for options 2 and 3, maybe you don't like this truck as much as you should.  Or could, as significant power train upgrades on a depreciated truck like this won't net you much $$$ value.  You're a fool with plenty of spare time and excess cash to even consider a V8/Tranny swap.

But obviously, the power train swap is the correct answer. Like, obviously!

You have a spare truck ('92 Dakota) to use.  You have the "good" transmission for a truck where it will supposedly drop right in. And yes, Magnum V8s are dirt cheap, unlike those fantastic LSX-FTW beasties that would be nice, but far more complicated.  This is a no brainer, son!  Get a used motor (as much as possible, like accessory brackets, emissions stuff, etc), get a heater for your garage, clean/re-gasket it and start swappin'!

It's either that, or dump it on Craigslist with the upgraded transmission in the bed to sweeten the deal. But then you'll be bored out of your mind, doing the swap is totally worth it. And nobody wants that!

 

Send your queries to sajeev@thetruthaboutcars.com. Spare no details and ask for a speedy resolution if you're in a hurry…but be realistic, and use your make/model specific forums instead of TTAC for more timely advice.



from The Truth About Cars http://www.thetruthaboutcars.com

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