Tranny options
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Senior User
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From: Dallas, Texas
Tranny options
I have somewhat looked into this in the past, and I asked about it in the transmission section but did not get much information so I thought I'd ask about it here in my home forum.
I have an 81 with a 300 and an automatic 3 speed tranny. I have already modded the engine plenty, and now I want to look at swapping trannys and possibly rearend.
I'm not sure what my gears are in the back, but my question is what is the ideal combination of an automatic transmission and rearend gears for use with the 300 . I hear manual swaps are too complicated, though I would do it if it were possible.
my goal is obviously lots of low end torque (reason I have the 300). I think I'm losing significant amounts of power in the 3 speed.
I have an 81 with a 300 and an automatic 3 speed tranny. I have already modded the engine plenty, and now I want to look at swapping trannys and possibly rearend.
I'm not sure what my gears are in the back, but my question is what is the ideal combination of an automatic transmission and rearend gears for use with the 300 . I hear manual swaps are too complicated, though I would do it if it were possible.
my goal is obviously lots of low end torque (reason I have the 300). I think I'm losing significant amounts of power in the 3 speed.
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Senior User
Joined: Dec 2004
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From: Dallas, Texas
Originally Posted by Col Flashman
If you've the standard C-4, you could go w/ a Gear Venders add-on O.D./splitter set up.
Postmaster
Joined: Apr 2000
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From: La Verne, California
It takes the place of your standard Tailstock Housing where its 'Puter Controled Under/Over Drive system resides. It gives you 6 foreword Gears & 2 reverse gears.
Here's a Link that give a complete explination.
http://www.transmissioncenter.net/ge..._overdrive.htm
Here's a Link that give a complete explination.
http://www.transmissioncenter.net/ge..._overdrive.htm
Last edited by Col Flashman; Sep 12, 2007 at 07:06 PM.
Senior User
Joined: Sep 2006
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From: MN
WOW that is a great big huge picture... nice too!
I would have to suggest a C-6 with the overdrive unit
or AOD (?) with 3.73 or 4.10 gears out back.
BTW I have a '78 F350 dually with 4-spd and 4.10 gears
Pulls like a tractor (good!) accelerates like a sports car (great)
definitely needs an O.D. though... 60 mph TOPS!
I would have to suggest a C-6 with the overdrive unit
or AOD (?) with 3.73 or 4.10 gears out back.
BTW I have a '78 F350 dually with 4-spd and 4.10 gears
Pulls like a tractor (good!) accelerates like a sports car (great)
definitely needs an O.D. though... 60 mph TOPS!
Post Fiend
Joined: Mar 2004
Posts: 24,418
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From: San Francisco, Ca.
WoomaHodal, Too bad you don't have a truck manual transmission.
Advance adapters makes a unit that goes between the engine/bell housing and the trans.
I have one in my '81 F150 4.9L T-18.
It's an Advance Adapters "Ranger Torque Splitter".
Technically, I have 8 speeds forward and 2 reverse.
Kind of fun to drive.
I can split any gear; kind of like an overdrive, for each gear.
Advance adapters makes a unit that goes between the engine/bell housing and the trans.
I have one in my '81 F150 4.9L T-18.
It's an Advance Adapters "Ranger Torque Splitter".
Technically, I have 8 speeds forward and 2 reverse.
Kind of fun to drive.
I can split any gear; kind of like an overdrive, for each gear.
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Post Fiend
Joined: Mar 2004
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From: San Francisco, Ca.
Originally Posted by Col Flashman
So I take it from your statement that they don't have anything tht'd work on an Auto Trans.
Man, that's a big picture; almost as big as the real thing.
Post Fiend
Joined: Mar 2004
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From: San Francisco, Ca.
Originally Posted by srercrcr
What kind of ratio are these units running (in comparison to Fords .70)?
Post Fiend
Joined: Mar 2004
Posts: 24,418
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From: San Francisco, Ca.
Originally Posted by WoomaHodal
hmm, so how difficult are these gear vendor things to install? what would the basic procedure be?
also, what do they cost? i cant find anything about that
also, what do they cost? i cant find anything about that
It has prices and installation info.