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Discussion Starter #1
I have a C6 tranny from an 86 F150 that is going in my 89 Bronco with an EFI 302 with a blown up AOD. My only problems are:


I cannot find a kickdown linkage or cable that will work with EFI. The junkyards could not help me.

My other problem is what do I do about the vacuum modulator hose. Where do I connect that to?


This kickdown linkage issue is really worrying me. I need to find something that will work. I have been three weeks without a vehicle. Any help would be greatly appreciated.
 

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Just hook the modulator up to the "tree" on the intake plenum. I'm pretty sure te c6 only needs an always on vaccum source. Some of the other vaccum sources are closed at low temperatures. You may need different driveshaft(s) and C6 specific tcase linkage as well.
 

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Discussion Starter #4
I just read that you dont need the kickdown attached on a c6 for it to operate normally without burning out and you can just down shift manually. This would be good news if it is true.
 

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yep I run mine without a kickdown. C6 doesn't have to have one to work fine. It just wont kick down to passing gear at highway speed unless you drop the shifter to 2nd. You will need a c6 or E4OD flex-plate. The drive shafts should be fine but I'm not positive.
 

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dont worry about the kick down, you just have to manuel shift it when and if you need to pass someone. not real sure on drive shaft.
 

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Driveshaft difference between 4X4 version of C-6 and AOD is 1.25" (AOD is longer). A lot of guys run the driveshafts without modifications. I chose to alter mine. If yours has any lift at all, it could be a problem, especially with the rear shaft.
I would think you should be able to find the linkage somewhere at a j/y. I switched from a C-6 to AOD, but I am trying to sell my stuff as a "set".
 

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i have no kickdown linkage on mine either. but i do have a B&M ratchet shifter, that makes it very easy to downshift it if needed.
 

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88/89 bronco's and F-series with EFI and a 351W should have a kick down cable because the only auto offered behind them was a C-6
 

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You may need to swap flex plates. I dont know if the converter bolts are in the same location on the AOD's as the C6's.
 

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I just did an aod to c6 swap in an 87. With the exception of the kick down cable bracket, my trans came with them from the donor, everything from the aod was a direct bolt on including the drive shaft and the c6 torgue converter bolted to the aod flywheel. For the vacuum I used the line off the cruise, it didn't work anyhow and connected it to the intake vacuum. Everything works great! So good I'm about to pull an e40d and replace it with a c6. I know more work is involved but goodbye to the electronic problems of the e40d!
 

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Discussion Starter #13
Thanks for the input everyone. The AOD is coming out tomorrow or monday so I will post updates. The beast will be alive once again!
 
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