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RFeury
Dodge Dakota
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7/11/2009
04:59:28
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 Subject: v6 to v8 swap
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If I replace a 3.9L v6 with a 5.2L v8 do I need the transmission from the v8?
seems like it should be a simple question, but I havent been able to find info on this anywhere
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Jefff
Dodge Dakota
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7/11/2009
09:08:38
| RE: v6 to v8 swap
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Message:
Step 1. Find out what transmission came with the 3.9.
Step 2. Find out what transmission came with the 5.2.
Are they the same?
If yes, keep 3.9 transmission.
If no, get 5.2 transmission.
See. Not so hard.
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Dakota49
Gen I
7/11/2009
13:48:01
| RE: v6 to v8 swap
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Message:
The 3.9 trans will bolt to the 5.2, the problem is, it may not hold up to the extra power the V8 makes.
Good Luck
Dakota49
dakota49
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daddio
Dodge Dakota
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7/11/2009
17:51:59
| RE: v6 to v8 swap
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Message:
what year?
Auto or Manual?
Makes a difference.
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RFeury
Dodge Dakota
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7/11/2009
19:27:38
| RE: v6 to v8 swap
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Message:
thanks for the replies
daddio- right now ive got a 1993 automatic, but the engine is from a 1995 Ram. I believe those are compatible. Not sure what the transmission from the Ram was, but im thinking about putting in a manual as long as im going to be changing it anyway. Anything complicated about that, aside from the obvious clutch pedal and shifter install?
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daddio
Dodge Dakota
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7/11/2009
20:19:29
| RE: v6 to v8 swap
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If the Ram is a manual all the better. Just find a donor Dak for the pedals and hydraulic clutxh release system.
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RFeury
Dodge Dakota
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7/11/2009
20:34:14
| RE: v6 to v8 swap
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The pedals shouldnt be a problem, theres a Pick-a-Part a few miles from here :-)
Still not sure about the Ram's tranny though.. Ive emailed the guy selling the engine about it, but he hasnt replied
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daddio
Dodge Dakota
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7/11/2009
21:06:02
| RE: v6 to v8 swap
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If you want to go manual look for an NV3500 5spd. Back around your Dak's year they used an AX-15 behind the V6's and the NV3500 behind the V8's. From what I've read the AX-15 won't last long behind a V8. Later on, I think around '98 or so they started using the NV3500 behind the V6's also. Not sure on the year though. I know my '00 V6 has one.
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RFeury
Dodge Dakota
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7/11/2009
21:28:23
| RE: v6 to v8 swap
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Message:
sweet... thanks a lot
Ive been trying to find model numbers for things like this but google isnt very helpful with that kind of thing.
One more thing, if the 5.2 engine was hooked to an automatic and i put in a 5 speed will i need to replace the ECU as well?
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daddio
Dodge Dakota
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7/12/2009
08:26:31
| RE: v6 to v8 swap
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"One more thing, if the 5.2 engine was hooked to an automatic and i put in a 5 speed will i need to replace the ECU as well?"
Not sure on this but I would err on the side of caution and say yes, get a PCM from a manual truck.
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cody jividen
Dodge Dakota
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3/14/2013
17:07:34
| RE: v6 to v8 swap
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Message:
Where do I get started? On this project
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daddio
Dodge Dakota
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3/14/2013
19:29:12
| RE: v6 to v8 swap
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Message:
If you have to ask that question are you sure you're up to the
job? Try finding a wrecked V8 truck for a donor. That way you
should have all the parts you should need.
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