I am going to have to deal with at least 2 FWD Mopar transmission rebuilds in the future. I want to grab a junkyard tranny, rebuild it and swap.

BUT

I am not sure about how to pick the right Junkyard transmission. Rather than ask 500 questions like will a 90 tranny work in an 84, will a 4 cylinder work behind a v-6 etc etc etc.

Is there a good website or resource for Identifying FWD Transmissions and hopefully interchangeability between model lines?

I only need it for Mopar stuff.

If it were rear wheal drive it would be a no brainer.

Thanks

There were changes made through the years with pump design and axle shaft size. Then there's lock-up verses non lock-up. The turbos had some different internals too. V-6's and 4 cylinders do not interchange. What are the cars that you are going to be working on? Model and year.

I am assuming they are automatics. If they are manuals I can help you with that too.

Thanks for the help.

One is a 1984 Daytona 4 cylinder. It leaks and starting to slip. I want to rebuild a tranny and just do a swap.

The other is a 95 Eclipse 4 cylinder that isn't shifting right. The Eclipse I haven't diagnosed yet. It may not be a rebuild issue. I was told it doesn't slip but won't shift. I gotta look at it first hand.

The third is a 94 Acclaim. The tranny is toasted.

I feel confident about the rebuild but IDing them is the problem. I know RWD transmissions but FWD are not my cup-o-tea.

The Eclipse I can't help you with. I know nothing about the DSM products.

On the Daytona you need to stick with and 84 or 85 transmission. They have a 6 bolt flexplate and three lug torque converters. In 86 Chrysler went to an 8 bolt crankshaft, a 4 lug converter and changed the pump engagement design. Is the Daytona turbo by chance?

The 94 has better options. First check to see if it has a lock-up converter or not. The plug for the lock-up is directly behind the base of dipstick. I'd bet it is a lock-up. Use an 89 or later model transmission.

Thanks for the info.

No the Daytona isn't Turbo. I can find lots of other 84/85 4 cylinder Mopars. Will any transmission fit or where there differnt types? How can I tell the model # on the transmission to get a rebuild kit/book?


As for the ecclipse I am hoping it is just a sensor or relay. I had a relay go bad on my son's 3.0 Shadow and it did the same thing as I was told this one is doing. I can't really get to look at it until this weekend.


Again thanks for the help.

They are all A413's and they are physically all the same and will bolt on. Here is a real good manual: http://atsg.com/cart/products/A404_670-38-7.html

Thanks dude!

That Rocks.

Would the 3.0 Auto in the 1994 also be an A413 also?

Yes for 86 chrysler changed the flexplate/flywheel situation and some other small things and there's no way to get the 85 and earlier to interchange with the 86+.

Quote:

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Would the 3.0 Auto in the 1994 also be an A413 also?

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3.0's did not get the 413, only the 4 bangers. The 3.0's got the A604 4speed overdrive auto or the A670 3sp auto. The A670 was basically the turbo version of the A413(which got more clutches than it's non-turbo variant) but with a 3.0 v6 bellhousing pattern. I have seen the minivans with the 3.0/3sp, but every 3.0 car that I've ever looked closely at has had the 604.

The 604 and 670 came out later on so they are basically interchangeable with which ever you can find from the late 80's/early-mid 90's if memory serves.

since you guys seem to know your trannys what tranny interchanges with my 96 caravan with a 3.3 automatic.no one can seem to tell me.sorry didnt mean to hijack the post but i relly need to get this van on the road.thanks

A couple of favorites I've saved since playing with the fwd's.

http://www.turbovan.net/Trans.html

http://www.turbodiy.com/Mopar%20Pages/Tranny%20upgrades%20detail.htm

http://www.thedodgegarage.com/index.html

that is what i thought but everyone says it is a 96 only.i have messed around with a few of them and to me they all look the same.it is a 4 speed with od.they are wantin anywhere from 1500 to 2500 to rebuild one.heck the van isnt worth that but it was our main car so i really need to do something

I don't see why it would be 96 only unless they changed something about the way the trans computer interfaces with the trans just for that year. I'm not 100% positive but I'm not aware of any changes in that year that could affect the ability to swap to a slightly older one. However my experience with the 604's is more with the early 90's stuff. I do know there was some internal revision made to the 604's at one point, but AFAIK it did not affect swapability.

Around here a junkyard 604 can be had for $100 or so at the local u-pull, and that comes w/ a 90 day warranty. If you can find one from a decent mileage car that looks like it was taken out in a crash, it's usually a better bet than the $$ for a rebuild.

Two small tips if you do get another trans, put an external trans cooler on it in addition to the one built into the rad. The o/d on these trans puts out a lot of heat and a trans cooler really extends the life of these units. Also make sure the shop uses chrysler atf+3 and NOT dexron/mercron.

wow a 100 bucks they are at least 250 to 650 around here and that is if you can find one i sure wish i lived where you do it really is getting frustrating