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Toploader Imposter Drama

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Old Mar 31, 2015 | 09:18 AM
  #1  
PRUSue's Avatar
PRUSue
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Mountain Pass
Joined: Jul 2010
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Toploader Imposter Drama

Hey guys, looking for some input here.

I brought my toploader 4spd to my machinist to have it rebuilt, and he informed me that I was mistaken and actually have the 3spd with overdrive. Obviously I am very disheartened. The trans lives behind a '66 428 in a shortbed F100.

So, I'm debating selling the 3spd and tracking down a true toploader 4spd. My main complaint has always been the drop in power between 2 and 3 gear (which makes sense now!). Is this a dumb idea- should I just leave well enough alone? It has lived there so far, bolts up to the engine and driveshaft, and the shifter fits the hole in the floor?

What kind of compatibility issues would I encounter if I did find a toploader? Would the shifter be in the correct position? I'd also need to make sure the input shaft was the same and the output shaft matched.
 
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Old Mar 31, 2015 | 10:07 AM
  #2  
HIO Silver's Avatar
HIO Silver
Fleet Owner
Joined: Dec 2009
Posts: 20,678
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From: NorCal
This would be the perfect time to go with a TKO-500/600 five-speed. Order a short-shaft version from Modern Driveline. Talk to Paul or Bruce.
 
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Old Mar 31, 2015 | 11:03 AM
  #3  
PRUSue's Avatar
PRUSue
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Mountain Pass
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Ah very nice idea but mucho $$. I'm looking to keep things on the cheaper side...

Is running the Imposter a bad idea in terms of load/capacity? I already spin ~3500rpm at 75mph, and I'd do worse if I switch it out.
 
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Old Mar 31, 2015 | 01:11 PM
  #4  
buckin69bronco's Avatar
buckin69bronco
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From: Bothell
What size tires and what axle gears are you running? 3500 at 75mph seems really high if you have an od trans.
 
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Old Mar 31, 2015 | 05:06 PM
  #5  
gfw1985's Avatar
gfw1985
Cranky Old Guy
Joined: Mar 2008
Posts: 3,562
Likes: 6
From: Raphine, Virginia
Here is some info on the imposter: Toploader Imposters
if you want to verify. From everything I've read/heard, I can't imagine it holding up to a big block.
 
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