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06-15-2006, 05:57 AM
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Senior Club Cobra Member
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Join Date: Jan 2005
Location: VALLEY FORGE,
PA
Cobra Make, Engine: SUPERFORMANCE w DOUG MEYER ENGINE
Posts: 1,958
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Not Ranked
.64 to .82 5th gear swap on tko600
Maybe one of you guys know the answer. Tried calling tremec but was put on terminal "hold" then got disconnected. Tried searching all over this website but could not find the answer.
Is it possible to swap out the .64 5th for a .82?
Thank you for any and all advice
JB
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06-15-2006, 06:06 AM
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Senior Club Cobra Member
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Join Date: Aug 2005
Location: Toronto, Canada,
Ont
Cobra Make, Engine: Shelby CSX 4995, Keith Craft built 427 SO
Posts: 1,168
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Not Ranked
JB, not sure of the TKO600, but I plan on having the 4 gear in the toploader I will be using in the CSX I have on order, changed from the 1.1 to the .82. I don't see any reason why any transmission could not be worked on. Maybe try David Kee for some advise on your special needs.
__________________
"The 427 Cobra is easily the highest performance car ever sold for street use. A decent 427 - not the worst, not the best, will go from zero to 100 mph and back down again to zero in less than 14 seconds. All thing considered, you can put together a pretty good argument that the 427 Cobra is the ultimate performance car, judged on any basis you want to name." Taken from; Corvette, The Sensuous American 
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06-15-2006, 06:24 AM
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6th Generation Texan
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Join Date: Feb 2002
Location: Devil's Backbone,RR 32,
TX
Cobra Make, Engine: Lone Star Classics #240,Candy Apple Red,Keith Craft 418w - 602 HP,584 TQ
Posts: 8,157
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Not Ranked
JB,
Give Standard Transmission a call.They sell and repair them besides carrying the parts.
http://www.standardtransmission.com/ |
06-15-2006, 07:30 AM
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Senior Club Cobra Member
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Join Date: Jan 2005
Location: VALLEY FORGE,
PA
Cobra Make, Engine: SUPERFORMANCE w DOUG MEYER ENGINE
Posts: 1,958
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Not Ranked
The Standard Transmission guys know their stuff.
So, just so everyone knows, They said Yes the gears can be swapped out.
They are calling back with the parts list and price.
JB  |
06-15-2006, 08:39 AM
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CC Member
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Join Date: Dec 2001
Location: San Diego,
CA
Cobra Make, Engine:
Posts: 2,977
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Not Ranked
Would like to get the details when you have them. I couldn't get my hands on a .82 when I needed it so I got the .6x
Please PM me when you find out.
__________________
Remember, It's never too early to start beefing up your obituary.
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06-24-2006, 06:43 PM
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CC Member
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Join Date: May 2006
Cobra Make, Engine:
Posts: 3
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Not Ranked
I just installed a new TKO600 in my BB. Originally I had a TKO and .64 overdrive and let Liberty Transmission (Michigan) talk me into a .84. What a perfect match it was, I love it. No more luging around in 5th gear and it is still great on the highway. I don't think that you will be dissapointed. good luck!
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06-24-2006, 07:13 PM
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Senior Club Cobra Member
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Join Date: Jul 2002
Cobra Make, Engine:
Posts: 15,712
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Hmmmm, I didn't know you could change a top loader 4th gear to anything other than 1 to 1 (which is stock).
No question about one thing: The .6 OD is worthless, the .8 rocks!
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06-24-2006, 08:33 PM
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CC Member
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Join Date: Oct 2004
Location: Odessa,
TX
Cobra Make, Engine: SOLD: ERA FIA #2114 with 331
Posts: 262
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Not Ranked
What rear end gear are you guys running with the
TKO 600 0.64 OD ? I'm planning on using the TKO 600 0.64 OD with a 3.73 rear end gear... At 70 mph the engine should turn at about 2100 rpm which I thought would be ok.. I'll be running a 331 stroker with a 280HR Magnum Comp Cam.. Am I dreaming?? 
Last edited by iwantacobra427; 06-24-2006 at 08:52 PM..
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06-24-2006, 09:09 PM
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CC Member
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Join Date: Dec 2001
Location: San Diego,
CA
Cobra Make, Engine:
Posts: 2,977
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Not Ranked
iwanta,
get the .82 it will be much more usable and leave at about 2500 on the freeway. The 331 will probably be happier with it.
__________________
Remember, It's never too early to start beefing up your obituary.
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06-24-2006, 09:17 PM
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CC Member
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Join Date: Apr 2004
Location: Frederick,
CO
Cobra Make, Engine: SPF Roadster, 418W
Posts: 385
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Not Ranked
iwanta,
second the motion on the .82. My 418 Windsor (3.73, .6 od) revs at about 2100 at 75 mph, but it doesn't like to accelerate from down there, and pings pretty bad on a hot day. I suspect my setup has a bit more torque than your 331. On the other hand, if you can run 100 mph all the time, you might love it!
Terry
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06-24-2006, 10:50 PM
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Senior Club Cobra Member
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Join Date: Jul 2002
Cobra Make, Engine:
Posts: 15,712
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Even with a good low rpm torquey motor the .6 will still be a drag until your really hauling down the highway.
The guys are totally right, .8 IS the way to go, MUCH better throttle response at cruise speeds.
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06-25-2006, 05:07 AM
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6th Generation Texan
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Join Date: Feb 2002
Location: Devil's Backbone,RR 32,
TX
Cobra Make, Engine: Lone Star Classics #240,Candy Apple Red,Keith Craft 418w - 602 HP,584 TQ
Posts: 8,157
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Not Ranked
iwanta,
I would go with the .82.
I have a T-56 so I have both of those gears.Running a 3.73rear.
The .64 is great on the road when I get into speeding ticket range.Other than that .82 is the gear of choice.
The drop in rpm between your 4th an 5th will have you wishing you had something inbetween or a .82 fifth.
When I get into 6th ,.64,I really have to becareful.If I don't,I find myself at 100-110 mph.Which is just right for the .64. |
06-25-2006, 05:16 AM
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CC Member
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Join Date: Apr 1999
Location: cleveland,
OH
Cobra Make, Engine: CSX4000, 427
Posts: 1,999
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Not Ranked
Quote:
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Originally Posted by JBCOBRA
Is it possible to swap out the .64 5th for a .82?
JB
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Without ever working on a tremec, I would guess that you would need to swap the countershaft gear as well as the OD gear. It may be better to buy a new 600 and sell your current one.
Quote:
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Originally Posted by 427SnakeSC
JB, not sure of the TKO600, but I plan on having the 4 gear in the toploader I will be using in the CSX I have on order, changed from the 1.1 to the .82. I don't see any reason why any transmission could not be worked on.
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4th gear in a toploader (non-OD version) happens when the output shaft couples directly to the input shaft, I.E. 1 : 1 ratio. There are no gears involved for 4th gear. What ford did with their OD version of the toploader, is to make 3rd gear the OD gear, less than 1, and then switch the shifter rods on the tranny, so when you went into third gear, you were really using the old 4th gear, 1 : 1, and then when you went to the new 4th gear, you were going into the old 3rd gear, which was now geared to be an overdrive. The problem with these trannys is that #1) the gear spacing is too wide for a performance usage, and #2) the trannys themselves are weak.
If you want an "OD" like toploader, get a wide ratio version, with a 2.78 first, and then get 3.07 / 2.88 rears, and you'll have in essence a "OD - Like" toploader, maintaining strength and some performance usage, with some economy at cruising
__________________
"After jumping into an early lead, Miles pitted for no reason. He let the entire field go by before re-entering the race. The crowd was jumping up and down as he stunned the Chevrolet drivers by easily passing the entire field to finish second behind MacDonald's other team Cobra. The Corvette people were completely demoralized."
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06-26-2006, 09:52 AM
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Senior Club Cobra Member
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Join Date: Jan 2005
Location: VALLEY FORGE,
PA
Cobra Make, Engine: SUPERFORMANCE w DOUG MEYER ENGINE
Posts: 1,958
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Not Ranked
Changing out 5th gear to the .82 is do-able on the tko 600!!!
The Standard Transmission guys are on Top of their Game.
I have the part numbers if anyone still wants/needs them. Just pm me.
Well, I know what my winter project is.
JB |
06-26-2006, 02:35 PM
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CC Member
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Join Date: Sep 2003
Location: Pleasanton,
CA
Cobra Make, Engine: CSX4771-CF. 1966 427 S/O
Posts: 197
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Not Ranked
JB,
You have a PM.
Mike
__________________
Rubber peelin' gears a jammin'!
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06-26-2006, 03:47 PM
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CC Member
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Join Date: Jan 2005
Location: Gig Harbor,
WA
Cobra Make, Engine: ERA FIA 2095, 331, w/ TKO 500
Posts: 59
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Not Ranked
Why not the TKO 500
I'm running a 3.54 rear gear w/ a TKO 500 which has a OD of .68. My rear tires are 295/50 x 15 (26.6" dia.). I must be the only guy who thinks this is a good combo. At 70 on the hwy, I tac about 2200 RPM. Plus I like the lower first gear for the quickness off the line. First gear is good to 40+ @ 6000 RPM. I appear to be alone here, but oh well.
Last edited by Ron Going; 06-30-2006 at 11:46 AM..
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06-26-2006, 03:56 PM
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CC Member
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Join Date: Sep 2003
Location: Pleasanton,
CA
Cobra Make, Engine: CSX4771-CF. 1966 427 S/O
Posts: 197
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Not Ranked
Ron,
You are right on the money. If I could cruise at 70mph at 2200 I'd be happy. I cruise at 70mph at 1800. My TKO-600 along with some of the other guy's are .64 OD not .68 as your's is. Your combo seem's fine. Mine on the other hand will ping at the slightest incline unless I am going 80-plus mph. I have 3:31 gears with 295/50 tires. Other than the OD I love the trans.
Mike
__________________
Rubber peelin' gears a jammin'!
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06-29-2006, 04:18 AM
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CC Member
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Join Date: Sep 2002
Location: Mechanicsville!,
PA
Cobra Make, Engine: Unique 427SC/331/5 forward
Posts: 922
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Not Ranked
Quote:
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Originally Posted by Excaliber
No question about one thing: The .6 OD is worthless, the .8 rocks!
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It's one thing to set a big, big block in the engine bay, stuff the rear with 3.55's or so, and then use the .82 hi gear.
It is another altogether with smaller stuff.
iwanta, stick with your combo, especially if you enjoy hi speed hiway cruising...do NOT be confused about that. My Unique with a 331 has always used the .64 hi gear Tremec 3550, 28" tall tires (275/60/15), and 4.09:1 in the rear, and I'm here to tell you that the combo is excellent and driveable beyond belief. I originally had a crate 302 in the car - and the 5th. gear roll-on at 75 mph just didn't have the oomph I wanted...enter the stroker. Now?- kicks a$$ from 75 to...well, to whatever speed you want.
Around town, the Tremec's 3.27 1st. gear has always been for show, light 'em up at will; but get into second and up and just see if you can wipe the grin off. Steady 18 - 19 mpg at 85 mph, right around 2600 rpm, and right at the point the cam starts to work (Ford Motorsports Z-303).
If you want to use the car for genuine hiway crusing, and trips longer than 30 miles, you stay with the deeper hi gear. You are assured you won't regret it.
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07-11-2006, 07:06 AM
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Senior Club Cobra Member
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Join Date: Jan 2005
Location: VALLEY FORGE,
PA
Cobra Make, Engine: SUPERFORMANCE w DOUG MEYER ENGINE
Posts: 1,958
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Not Ranked
Here are the parts required for a .64 to .82 5th gear swap.
You need tcfp4250 and tces4745 and an o ring set
$186.90 and $159.00
plus shipping
A Good project.
Cheers
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07-11-2006, 07:50 AM
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CC Member
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Join Date: Dec 2001
Location: San Diego,
CA
Cobra Make, Engine:
Posts: 2,977
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Not Ranked
Thanks for the parts info. Next time I need to pull the trans I think I'll make the swap to the .82
__________________
Remember, It's never too early to start beefing up your obituary.
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