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Author
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Topic: Questions about slushboxes
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68F100
Gearhead Posts: 2609
From: Burlington, Iowa
Registered: Oct 99
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posted 09-03-2005 11:11 PM
   
Trying to find out which way to go on a project I'm helping out on.The vehicle is a 90 GT with a warmed up 302. Hoping for 400 HP at the crank. How the car will be used: street/strip with more emphasis on the strip eventually. The car has 3.73 gears in it. I'm trying to decide whether to get a beefed up AOD(for ease of driving to the track) or a C4. From what I've heard, the C4 is the beefier, more reliable transmission, but I admit I don't know much about either. So, any opinions? If we go with the C4, is there major mods to make it work in this car?
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steve'66
Gearhead Posts: 9489
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 09-03-2005 11:52 PM
If it's mostly track the C-4 is the way to go. It will use far less power than an AOD. Properly built they can reliably handle over 500 hp. SteveW
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Bloose
Gearhead Posts: 755
From: Milwaukee, WI
Registered: Dec 2001
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posted 09-04-2005 01:56 PM
Look at Lentch and Buamann for info on the AOD. The C4 is a more efficient and ighter trans but the AOD is hard to beat for a true street strip car. So far my AOD has held up very well to my 289. I'm guessing my 289 is about 350hp + 125HP N2O. I'm not planning for the AOD to last forever though. I got lucky and found an rebuilt and never installed AOD on e-bay for $265, and it was local to boot.If you go AOD plan on at the very minimum getting a hardend inner input shaft or better yet a 1pc input shaft, that is a very weak link on the AOD. I went with the hardend inner to retain the lockup converter. The AOD can be a very good very strong trans as much of the internals are sized like the C6, but there are some issues that should be dealt with for serious performance. Like I said though, mine is holding up fine and it is all stock with a shift kit, A servo, and hardened input shaft. HTH,
B-loose P.S. The AOD allows me to run a 4.62 rear gear and still drive on the freeway at under 3000 RPM!
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