Transmission Swap
Tuned
Joined: Oct 2009
Posts: 302
Likes: 0
No. It CAN be done, but the juice won't be worth the squeeze. It might pay for itself in gas mileage after 100k miles.
An AOD swap would be a worthwhile venture, but it won't be quite as strong as the C6. I think you could even reuse the driveshafts.
An AOD swap would be a worthwhile venture, but it won't be quite as strong as the C6. I think you could even reuse the driveshafts.
Super Moderator
Joined: Apr 2004
Posts: 34,495
Likes: 2,809
You can read specs and propaganda here on this 4x4 beefed AOD to get an idea or two on the AOD conversion. This is still cheaper than a new Gear Vendors set up, and cheaper than an E4OD, which would also require a $500+ controller on top of the trans:
TCI Auto: AOD StreetFighter® Transmission 4X4
TCI Auto: AOD StreetFighter® Transmission 4X4
Super Moderator
Joined: Apr 2004
Posts: 34,495
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According to this:
TCI - TECHNICAL INFORMATION: Transmission Dimensions
C6: 33 1/2
AOD: 30 3/8
Not sure if this is correct for 4x4 model transmissions.
TCI - TECHNICAL INFORMATION: Transmission Dimensions
C6: 33 1/2
AOD: 30 3/8
Not sure if this is correct for 4x4 model transmissions.
Fleet Mechanic
Joined: Mar 2005
Posts: 1,603
Likes: 1
From: St Louis
It wasnt specific if that deminsion was for the 4x4 or the 4x2 trans, but the 4x4 C-6 is something like 8 inches shorter than the 4x4 E4OD. An inch of difference I would think the driveshafts could handle b/w the AOD and C-6, but why would you want to go to a the early E4OD with its known problems just for gas mileage? A good tune-up can get you within a mpg of the E4OD mpg on that C-6 unless it is slipping terribly.
Lead Driver
Joined: Sep 2002
Posts: 9,182
Likes: 12
From: Gateway to the West
Rebuild the C6 or make the AOD swap. You don't want an E4OD from that model year anyway even if you did spend all that extra money for no reason. The E4OD is by far the longest (physical dimension), most expensive, and most difficult to install of the three units. Given that the E4OD requires a separate controller in any vehicle that wasn't originally equipped with it so that it will "know" when to shift, its just a lot of time, money and effort that isn't really necessary.
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Posting Guru
Joined: Apr 2006
Posts: 1,274
Likes: 1
I wasnt sure which way he was switching. I think the highway millage would be consideratly better with OD. I would agree with Greystreak, C6 or AOD unless it has a E40D allready.
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Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
if you swap to an AOD you will need to purchase a new flexplate for an 88-89 crownvictoria with a 5.8/AOD. reason being is the 5.8 was never bolted to an AOD from the factory in a bronco or f150. to bad your in Virgina as i have an AOD with the proper 5.8 flex plate for sale but im in Oregon and shipping would be a killer.
Tuned
Joined: Oct 2009
Posts: 302
Likes: 0
Why would you need to change the flywheel? Aren't they both 164 tooth w/ the same bolt pattern? I've gone from C4 to C6 or AOD a few times & never had a problem. I had a problem with an older C4 once. I got a bellhousing for a Windsor w/ 164 tooth flywheel, but I was running a 157 tooth on a 302. I had to swap the bellhousing so the starter would engage.
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kvillecomet
1987 - 1996 F150 & Larger F-Series Trucks
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Apr 22, 2009 08:58 PM
