AOD sporadically jumps out of OD at 65+ for <1s

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Bludacious

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Nov 18, 2024
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Location
Charlotte
Vehicle Details
'91 5.0 base, automatic
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Hi everyone! New here & will be sharing some mods I've already done to my bird that I haven't seen here or elsewhere, but for right now I'm in need of some assistance.

Had my AOD rebuilt plus mild shift kit first week of ownership by the race trans shop my boss uses for all our costumers hi-perf transmissions. Worked flawlessly 'til a few weeks ago when I replaced the plastic TV cable bushing due to it being cracked. Just so I'm clear: at no point did the cable detach from the throttle arm, I replaced the bushing to prevent this. I triple checked the cable adjustment before leaving the shop (I dailied a Gbody for a long time so I know TV adjustment is life or death for these OD autos). As I was leaving it kept trying to shift into OD by like 40mph, I stopped & again checked adjustment, when I started driving again all was normal.
Then I went to Florida & it started acting up from then onward. When I get on the freeway & apply light to mid throttle above 65-70mph it'll randomly pop out of gear (or into a lower gear?) for a fraction of a second, then continue as if nothing happened. Of course this bucks the entire car too which is rather alarming. Transmissions are the only thing I don't mess with personally on my rides so I'm at a bit of a loss. I don't have a pressure test gauge but I'm sure I can get one, & I have access to a lift to drop the pan if needed but I'd really rather not drop the V.B. as I don't want to risk losing springs or check balls.
 
If all this started after messing with the TV cable, I would definitely be looking at the TV cable adjustment as the most likely cause. If the old plastic bushing was cracked, then it’s possible the trans shop adjusted it to compensate for the play in the bushing, and now that you fixed that, it is adjusted too tight causing it to try to downshift too early.
 
MadMikeyL said:
If all this started after messing with the TV cable, I would definitely be looking at the TV cable adjustment as the most likely cause. If the old plastic bushing was cracked, then it’s possible the trans shop adjusted it to compensate for the play in the bushing, and now that you fixed that, it is adjusted too tight causing it to try to downshift too early.
Click to expand...
The previous plastic bushing was also installed by me after I had to remove the cable to remove the TB. The way it cracked didn't allow any slop in the linkage, it was splitting along the circumference (like slicing a sausage).

I adjusted the cable by opening the lock clip, holding the crimp with a pair of vise grips, gently pulling the cable to its maximum travel, then pulling the throttle to WOT & closing the clip. Is this the correct procedure? I will admit I didn't do diligence & ASSumed this was how it's done since that's how it works on the 2004R 😬
 
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