A 5 speed in a Grand Caravan? Why would
somebody want to do something crazy like that. Well me. I
for the V6 version of the van and Ma didn't give the option of getting
one of these transmissions from the factory. So it looks like I
have to figure out how to do it myself. Hopefully Ma will be good
to me and have a few bolt on parts so the fabrication isn't so
Read on and find out what I learned. Some of it is quite
Or at least I thought it was.
Part of the Project
Inlet Pipe (Early A670 only)
I also used this site Harv created after he did the swap on his '90 Lebaron drop top:
I'm not going to detail the exact removal and replacement of the transmission. Harv's page already covers the basic install. This page focus is on what parts are required to do the same in a minivan.
There are several things that had to be
in order to determine the feasibility of this project. Half
motor mounts, shifter & cables, and brake & clutch pedal
set w/clutch cables. Each will be addressed in it's own section
The front mount is identical and will get
in the project. The trans. mount though is a different
Once I had the automatic and manual brackets in hand there are obvious
differences in the bolt patterns between the automatic and manual
brackets. The good news is the passenger cars and vans shared a
bracket for the manual transmissions.
Picture of a Small Mount A670 transmission Bracket
Picture of an A520 bracket modified for the A543
What I ended up doing was using an A520 bracket from an '89 minivan and modifying it to fit the A543. If you look at the picture above you can see where a notch was cut into the bracket to allow it to clear a spot on the case and bolt flush. For gen2 minivans the bracket from an A523 is a direct bolt on with no modification.
Picture of modified motor mount attached to trans.
The manual transmissions also recieved a bobble strut on the
of the transmission. A bracket needs to be fabricated and
to the K-Frame. See the pictures below to get the idea of what
to be done.
Fabricated Bobble Strut mount bracket.
Diagram of the shifter for the 5 speed - '89- up A555/568/523/543
Gen 2 Minivan shifter cables
Update: When I went to mount the shifter in the van I cut a slit in the carpet where I thought it should go. After peeling a section back I discovered the sound deadening material underneath had a cut out for where the shifter needs to go. The shifter sits inside this cut out very snug. Not too far from there was a plug in the floor for where the cables needed to come through. With the gen 2 minivan cables attached to the trans. and fished in the opening everything fit together like a glove.
A gent with a '94 van down in Florida did the conversion and found that
the Daytona cables will fit. Looks like this opens doors to make
more of these conversions possible.
There is an additional stopper piece for the clutch pedal that needs to be grabbed when the pedals are pulled from the doner van. There is a picture a little further down of it.
For vehicles with cruise the clutch pedal had a separate switch to disrupt the cruise if the clutch pedal was pressed in.
Clutch & Brake pedals from a Gen1 Minivan
Clutch pedal stop bracket
A670 Automatic Transmission Neutral Safety Switch
Electrical Diagram 3.0L V6
Modified Wiring chart with the A543
If your looking for an Aluminum Flywheel one can be obtained through a Fidenza reseller. FWDPerformance http://www.fwdperformance.com/ stocks them and more information about the flywheels can be obtained from Fidenza's site at: http://www.aluminumflywheels.com/
2 vendors for clutches I have heard good things about is Euro Drive
and Dealer's Equipment. Euro-Drive clutches can be obtained in
USA through http://fwdmoparmuscle.com.
I've had my trans out already for other reasons and installed a 4
puck ceramic clutch from Euro-Drive. I'll say this much for it it
grabs like there is no tomorrow.
Flywheel & Clutch(2.2/2.5L shown. 3.0L Similar)
Note: The lower dust cover from the automatic transmission will have to be modified. When used with the A543 the tail extension housing on the transmission interferes with it requiring it to be trimmed to fit. Nothing a pair of tin snips can't handle.
3.0L engines equipped with the A670 automatic transmissions use a different inlet pipe. The A543 has no provision for bolting it to the transmission like the A670 had. A inlet pipe from an A604 or A543 equipped vehicle will have to be acquired. It has a flange that is held to the motor by 2 of the transmission bell housing bolts instead of the bracket that attaches to the trans case.
I want to add that I was recently out in the junkyard pulling an
wiring harness off of a '93 Caravan w/3.0L/A670 and it had an inlet
like the A604's with 2 ears that attached via 2 transmission housing
A670 Inlet Pipe
If you need a replacement o-ring for the water pipe the chrysler part number is MD030764.
More Information Coming soon!
For now enjoy this information Ed Kelly posted to the chrysler3litrev6 mailing list:
"The minivan clutch pedal assembly is only slightly different than the one used in the cars. The plastic cam is shaped differently and white in color. The car version is black. Available and cheap.
The pedal is has the corner clipped at a 45 degree angle (the corner that would be closest to the firewall). A grinder can quickly modify a car pedal.
The minivan pedal rod is a must have. The car version is too short!
The mininvan spacer is not available, but appears to be a shorter version of car spacer (I ground mine shorter with a bench grinder...)
For the clutch pedal stop, I cut the one off my junkyard assembly cut a slot in the mounting surface. Cut off the neutral switch mount and turn it around. Adjusted it until I was satisfied with the pedal height (about the same as the brake pedal...)
The minivan brake pedal (MT) is not
but the AT brake pedal can be cut down with a Tiger Saw. The AT
pedal uncut interfered with the clutch pedal on my van... Cut
an MT rubber pad fits nicely and looks "normal""
Thanks for the info Ed!!!
|Name||Year of Van & Model||Version of Trans||Completion Date|
|Robert E. Carter, III||'88 Dodge Grand Caravan SE||A543 w/3.50 Final||05/02|
|Edward Kelly||'91 Plymouth Voyager||A543 w/3.77 Final||12/02|
|Gord Ducharme||'87 Dodge Caravan||A543 w/3.77 Final||06/03|
Picture of A-543 Transmission Bell Housing View