1999 v6 Accord engine/tran replaced with 2004 v6 Accord

alpha232

I recently had a massive transmission failure (go figure) which showed no symptoms until catastrophic failure.

I have the opportunity to get an entire 2004 v6 engine and transmission for a good price. I was told that the mounts and connections are the same between these two model years and the only difference is the computer which they will swap as well.

Any warnings or helpful information about this?

the whole deal is costing me about $1200 vs $4000 for a rebuilt w/ install.

mrbill1957

If you search on transmissions in the 2003-2007 Accord posts, you should find information on early V6 transmission problems. There was an issue with lubrication and a modification for better lubrication was performed.

I never would have guessed you could put an 04 Accord V6 engine and transmission in a 99 Accord. I'm just thinking of the long list of things which need to fit, (transmission/engine mounts, exhaust, wiring harnesses, drive axles, radiator hose size and location, transmission cooler lines, air intake, etc. etc.) I can't say it's not possible, I'm just surprised.

I thought the 04 V6 was the first year/model the "drive by wire" was used?

Good luck, please post on how it turns out!!!

Mrbill

alpha232

well it may be an 03, not 100% sure on the details... honestly this is coming together too fast for me but I have little to no choice in the matter and depending on these mechanics to do the right thing...

Thats why i'm asking for alternatives, as $4k is out of the ballpark and no other options at hand.

elroy5

I don't think this mechanic knows what he's getting himself into here. I hope they are going to have the engine/transmission computer in the deal. The 03+ V6 engines have drive-by-wire, and the transmission is a 5 speed, whereas the 99 is 4 speed. You can also be sure the wiring harnesses are different, and that will lead to many problems to overcome. I hope they know what they're doing. The 03+ year transmissions are probably no more reliable than the 99 was, IMO.

mrbill1957

I'm assuming you tried local junk yards for an appropriate transmission?

Do you feel comfortable with the mechanics performing the swap? I would hope it's a legit shop and not someone in their backyard.

The whole thing sounds scary to me, but good luck if you do go through it.

Mrbill

alpha232

Thanks for the words of caution...

This is through a friend who's brother is an Adjuster and this is one of the shops he deals with...

I have tried all the area junk yards and no luck... I wouldn't even consider such a frankenstein move unless I was out of options... The downside is this was a used car and still has a loan on it.

No more spectacular discounts, rebates or offers for drive it, tow it, push it, trade ins.. so yeah I'm kinda out of options.