4 speed tranny stuff for the V8 and high HP /6 crowd, Pictures |
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4 speed tranny stuff for the V8 and high HP /6 crowd, Pictures |
Dr Evil |
Feb 25 2008, 05:53 PM
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#1
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Send me your transmission! Group: Members Posts: 22,993 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
Here is the latest gearbox I am building for someone. It is an F-N-X-HBf box and I wanted to show how easy it is to lock out 1st in a 4 speed box. I have heard that there are people that charge a chunk of change to do the same thing....I think that is wrong as it is way easy. All you need is a rear gasket, tubing cutter and a section of 3/8" copper tubing (1/2" shown as I bought the wrong size).
Here is the FNXHBf stack (Ooo, purdy). Here is the shift rod end for 1st that needs the sleeve to lock it out. I removed 1st gear completely other than the gear on the input shaft as you need it for reverse. And here is the section of ~2" copper tubing. You need to keep the slider for revers. It looks like the sleeve will hit the slider, but it is just the angle of the pic. |
Dr Evil |
Feb 25 2008, 05:54 PM
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#2
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Send me your transmission! Group: Members Posts: 22,993 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
This could easily be done by anyone with limited experience.
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So.Cal.914 |
Feb 25 2008, 06:00 PM
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#3
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"...And it has a front trunk too." Group: Members Posts: 6,588 Joined: 15-February 04 From: Low Desert, CA./ Hills of N.J. Member No.: 1,658 Region Association: None |
Cool Evil... (IMG:style_emoticons/default/smile.gif)
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dwillouby |
Feb 25 2008, 06:11 PM
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#4
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Member Group: Members Posts: 391 Joined: 27-December 02 From: Mt Washington, KY Member No.: 29 Region Association: None |
I did the same thing to mine. Also installed an H gearset and fliped the others.
Very easy procedure. These are so easy to work on why would anyone pay someone to do it for them? (IMG:style_emoticons/default/biggrin.gif) David |
Trevorg7 |
Feb 25 2008, 06:12 PM
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#5
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Senior Member Group: Members Posts: 1,242 Joined: 7-December 04 From: Highland Village, TX Member No.: 3,241 Region Association: Southwest Region |
Is that the one we did at my place last month or another using the same method?
Cool stuff either way T |
Dr Evil |
Feb 25 2008, 06:23 PM
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#6
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Send me your transmission! Group: Members Posts: 22,993 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
Nope, this is a different box.
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BIGKAT_83 |
Feb 25 2008, 06:30 PM
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#7
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Senior Member Group: Members Posts: 1,798 Joined: 25-January 03 From: Way down south Bogart,GA Member No.: 194 Region Association: South East States |
I did the same thing to mine. Also installed an H gearset and fliped the others. Very easy procedure. These are so easy to work on why would anyone pay someone to do it for them? (IMG:style_emoticons/default/biggrin.gif) David I agree ............Really no trouble at all to flip the gears and install a H gear. I didn't bother with blocking off the first gear,just don't use it for anything. Bob |
Dr Evil |
Feb 25 2008, 06:43 PM
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#8
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Send me your transmission! Group: Members Posts: 22,993 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
I was referring to the lockout modification as being easy and not worth paying big $$ for, I still understand when someone pays ME to do thier gearing and such.
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Dr Evil |
Feb 25 2008, 06:44 PM
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#9
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Send me your transmission! Group: Members Posts: 22,993 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
When you guys say that you flipped other gears, what combo do you like best?
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marks914 |
Feb 25 2008, 07:35 PM
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#10
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Senior Member Group: Members Posts: 845 Joined: 9-October 04 From: the motor city Member No.: 2,912 Region Association: None |
When Brad Mayeur did mine, he said it was no big deal, I can see why now.
I have the F- flipV-flipN-flipH setup, can't complain so far. Been running over 400 HP through for a while now. Nothing like hitting 100 in 2nd. Mark Attached thumbnail(s) |
Dr Evil |
Feb 25 2008, 08:09 PM
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#11
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Send me your transmission! Group: Members Posts: 22,993 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
That seems like a tight grouping in the upper gears. Quite a bit of distance between 1 and 2 as well according to my chart.
Attached thumbnail(s) |
rick 918-S |
Feb 25 2008, 09:22 PM
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#12
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Hey nice rack! -Celette Group: Members Posts: 20,354 Joined: 30-December 02 From: Now in Superior WI Member No.: 43 Region Association: Northstar Region |
What tire size are you using in your charts? 245/50?
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Dr Evil |
Feb 25 2008, 09:29 PM
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#13
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Send me your transmission! Group: Members Posts: 22,993 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
Tire diameter of 25"
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Andyrew |
Feb 26 2008, 12:37 AM
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#14
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California |
So based on this info, with a 26" tire, and a 7k rev limit... we could hit 60 in F gear? on a stock 901?
Dang, I am really short shifting.... Think of the 0-60 times... mid 3's!! |
Dr. Roger |
Feb 26 2008, 02:38 AM
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#15
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A bat out of hell. Group: Members Posts: 3,944 Joined: 31-January 05 From: Hercules, California Member No.: 3,533 Region Association: Northern California |
I think mine is a (1st gear delete) tight 1st, second, and third group. Then 4th is a big jump, a flipped H for freeway cruising.
Running errands has never been more fun. (IMG:style_emoticons/default/aktion035.gif) Dr. Evil, I really like your ratio charts. Is there a way to tell what gears I have by rotating the input shaft and counting rotations of the output shaft? or visa-versa? I'm curious what my 2 backup trans axles are running. |
Dr Evil |
Feb 26 2008, 08:23 AM
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#16
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Send me your transmission! Group: Members Posts: 22,993 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
I think mine is a (1st gear delete) tight 1st, second, and third group. Then 4th is a big jump, a flipped H for freeway cruising. Running errands has never been more fun. (IMG:style_emoticons/default/aktion035.gif) Dr. Evil, I really like your ratio charts. Is there a way to tell what gears I have by rotating the input shaft and counting rotations of the output shaft? or visa-versa? I'm curious what my 2 backup trans axles are running. I would imagine so. The ratio of turns of the input shaft to turns of the output flange will give you a ball park of what you have. I have never tried it, but it may be quite accurate. Give it a shot and post your results and we can figure it out. the chart that I am using is from Carquips web site. I down loaded it and then I plug in the gears and save the chart. Any combos you want ot see, just let me know and I will post it. You like the short 1-2-3 and a long drop to 4th? I was under the impression that with the F-N-X-HBf that it would be smoother as the shifting is the same from gear to gear. If the preference is for the shorter 1-3 then I should let my customer know so I can see if he still wants to buy the X gear from me to make the pattern I felt was best. |
Dr Evil |
Feb 26 2008, 08:24 AM
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#17
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Send me your transmission! Group: Members Posts: 22,993 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
So based on this info, with a 26" tire, and a 7k rev limit... we could hit 60 in F gear? on a stock 901? Dang, I am really short shifting.... Think of the 0-60 times... mid 3's!! 25" wheels. With 26" wheels you will hit 70 faster, if you have the torque to pull it off. |
Dr Evil |
Feb 26 2008, 08:47 AM
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#18
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Send me your transmission! Group: Members Posts: 22,993 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
That seems like a tight grouping in the upper gears. Quite a bit of distance between 1 and 2 as well according to my chart. More thoughts. It also depends on your power plant as you all know I am sure. All V8s are not the same. The engine I am building the box for is 200+ hp and peters out at 4200 rpm. So the shift points you get with my set up in this box are about: -1st shift at 4K gets you to 35mph and 2nd at about 2.3k -2nd at 4k gets you 63 mph and 3rd at 2.9k -3rd at 4k gets you 85mph and 4th at 3K -4th at 4k gets you 115mph with room to go to 183 mph (theoretically) |
michaelt55 |
Feb 26 2008, 09:04 AM
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#19
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Graduate of Life's experiences Group: Members Posts: 438 Joined: 2-September 06 From: Richmond, Texas Member No.: 6,753 Region Association: None |
Looks good to me Mike....
thanks.. Michael That seems like a tight grouping in the upper gears. Quite a bit of distance between 1 and 2 as well according to my chart. More thoughts. It also depends on your power plant as you all know I am sure. All V8s are not the same. The engine I am building the box for is 200+ hp and peters out at 4200 rpm. So the shift points you get with my set up in this box are about: -1st shift at 4K gets you to 35mph and 2nd at about 2.3k -2nd at 4k gets you 63 mph and 3rd at 2.9k -3rd at 4k gets you 85mph and 4th at 3K -4th at 4k gets you 115mph with room to go to 183 mph (theoretically) |
Andyrew |
Feb 26 2008, 07:53 PM
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#20
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California |
So based on this info, with a 26" tire, and a 7k rev limit... we could hit 60 in F gear? on a stock 901? Dang, I am really short shifting.... Think of the 0-60 times... mid 3's!! 25" wheels. With 26" wheels you will hit 70 faster, if you have the torque to pull it off. If we have the tq... is that a joke? (IMG:style_emoticons/default/biggrin.gif) |
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