Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 07-30-2012, 07:33 PM   #161
Bassman/NZ
Senior Member
 
Bassman/NZ's Avatar
 
Join Date: May 2010
Location: Napier, New Zealand
Posts: 2,001
Default Re: F150 tranny with overdrive

Quote:
Originally Posted by bettlesr View Post
By checking the tag on the one I drove in Florida and on mine and actually counting the ratios with the trans out on mine, they are both the 3.00 1st, 1.77 2nd, 1.00 3rd and .725 4th. this is the 37% trans. With the stock trans and the new engine I can easily start in second or go around corners without shifting. A lot better for the car and more fun to downshift though!
37% would be .63 4th, or is my math wrong?
Bassman/NZ is offline   Reply With Quote
Old 07-30-2012, 07:40 PM   #162
miss victoria
Senior Member
 
Join Date: Oct 2011
Posts: 310
Default Re: F150 tranny with overdrive

there are many disscussions on this ,ive done these for over 20 years,and figure .725= 28% o.d. the books call it 37% go figure?
miss victoria is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 07-30-2012, 08:23 PM   #163
chiliman
Senior Member
 
Join Date: May 2010
Location: Liberty, MO
Posts: 200
Default Re: F150 tranny with overdrive

Thanks for the information will try to swap out the gears called cobra transmission today they are suspoist to get back with me any one have a cluster geer and fourth laying around would be intersted thanks
chiliman is offline   Reply With Quote
Old 07-30-2012, 08:57 PM   #164
miss victoria
Senior Member
 
Join Date: Oct 2011
Posts: 310
Default Re: F150 tranny with overdrive

,if you want the .28% you will need an input shaft, overdrive gear and cluster. 22% you will need an overdrive gear and cluster. (both not easy to find) i have a complete 22% o.d. kit for sale,$2975.00+ shipping, (paypal only)
miss victoria is offline   Reply With Quote
Old 07-30-2012, 09:47 PM   #165
Jim Parker Toronto
Senior Member
 
Jim Parker Toronto's Avatar
 
Join Date: May 2010
Location: Toronto, Ontario, Canada
Posts: 1,289
Default Re: F150 tranny with overdrive

Quote:
Originally Posted by miss victoria View Post
,if you want the .28% you will need an input shaft, overdrive gear and cluster. 22% you will need an overdrive gear and cluster. (both not easy to find) i have a complete 22% o.d. kit for sale,$2975.00+ shipping, (paypal only)
Just curious, Miss Victoria, where are you located?
Jim Parker Toronto is offline   Reply With Quote
Old 07-30-2012, 10:03 PM   #166
miss victoria
Senior Member
 
Join Date: Oct 2011
Posts: 310
Default Re: F150 tranny with overdrive

Sponsored Links (Register now to hide all advertisements)
calif
miss victoria is offline   Reply With Quote
Old 08-01-2012, 08:26 AM   #167
AL in NY
Senior Member
 
AL in NY's Avatar
 
Join Date: May 2010
Location: Southern Upstate New York
Posts: 926
Default Re: F150 tranny with overdrive

miss victoria, I think the way you're calculating the OD percentage is totally wrong. A transmission with a .7246 OD ratio means the engine turns .7246 revolutions and the drive shaft turns 1 revolution. So, when the engine has turned 1 full revolution, the drive shaft has turned 1.38007 revolutions. It is overdriven by 38%. So, a final OD ratio of .7837 = 27.6% and .7087 = 41.1%. There isn't a 22% OD transmission for that F150 tremec transmission. Please see my chart (post #8) earlier in this thread .
__________________
AL in NY

Last edited by AL in NY; 08-01-2012 at 01:21 PM.
AL in NY is offline   Reply With Quote
Old 08-01-2012, 08:45 AM   #168
AL in NY
Senior Member
 
AL in NY's Avatar
 
Join Date: May 2010
Location: Southern Upstate New York
Posts: 926
Default Re: F150 tranny with overdrive

chiliman, you may want to look into the 41.1% transmission further. The gear ratios in that transmission are; 1st = 3.006, 2nd =1.776, 3rd = 1.00 and fourth is .7087. Now if you do the math, with a 4.11 rear end ratio, the final drive ratios are 1st =12.35, 2nd =7.29, 3rd = 4.11 and fourth is 2.91. Compare this to a 3.78 rear and the 27.6% OD transmission and you get 1st = 12.28, 2nd = 7.25, 3rd = 3.78 and fourth is 2.96. Looks like the only big difference is 3rd gear, 4.11 verses 3.78. Using the 41.1% transmission is going to be way cheaper than buying all the guts you'll need to change it to a 27.6% OD transmission.
__________________
AL in NY
AL in NY is offline   Reply With Quote
Old 08-01-2012, 01:17 PM   #169
miss victoria
Senior Member
 
Join Date: Oct 2011
Posts: 310
Default Re: F150 tranny with overdrive

Sorry al i dont agree with you ,no one i know that used that o.d. Raito liked it. I throw those gear sets away.
miss victoria is offline   Reply With Quote
Old 08-01-2012, 01:22 PM   #170
CarlG
Senior Member
 
CarlG's Avatar
 
Join Date: Nov 2010
Location: Anchorage, Alaska
Posts: 8,587
Default Re: F150 tranny with overdrive

Quote:
Originally Posted by Pete View Post
... have talked to at least 20 people that have the transmission in discussion and EVERY one of them said after driving it that they were not completely satisfied with the ratios. I noticed quite a few on this thread said the same thing...
Talk to me, then that will ruin your 100% record!
CarlG is offline   Reply With Quote
Old 08-01-2012, 03:01 PM   #171
chiliman
Senior Member
 
Join Date: May 2010
Location: Liberty, MO
Posts: 200
Default Re: F150 tranny with overdrive

Al in NY thanks for the in formation sounds like 41% with 411 rear end may be the way to go I have one of them scoped out for 200 dollars pulled the top off today at the reabilders gears all look good he is gona be ording the rebuild kit bearings scrnozer and shaft I may try it with the 378 rear first but Im thinking it wont have much power will keep you informed thanks agin
chiliman is offline   Reply With Quote
Old 08-01-2012, 03:52 PM   #172
AL in NY
Senior Member
 
AL in NY's Avatar
 
Join Date: May 2010
Location: Southern Upstate New York
Posts: 926
Default Re: F150 tranny with overdrive

miss victoria, I wasn't recommending the 41.1% OD transmission, just trying to show you the correct way to calculate OD percentage.
__________________
AL in NY
AL in NY is offline   Reply With Quote
Old 08-01-2012, 05:23 PM   #173
Bassman/NZ
Senior Member
 
Bassman/NZ's Avatar
 
Join Date: May 2010
Location: Napier, New Zealand
Posts: 2,001
Default Re: F150 tranny with overdrive

Quote:
Originally Posted by fordgarage View Post
The new aluminum F150 Model A clutch housing (Mac's?) I recently saw in Wisconsin did not impress me much. Great idea, but poorly executed.

They did not bother to index their new housing design to the Model A flywheel housing to insure or control the centerline alignment of the transmission to the flywheel.

All you guys that agonize over 'dialing in' the flywheel housing to the block can throw away all your fancy measuring tools and replace them with a Stanley tape measure when using the new F150 Model A bell housing I saw.
Did the housing you saw have Macspeed embossed on it, because the Macspeed units here in New Zealand are superb quality, and there are a great number of them in use. I'm picking the one you saw was either some off brand or if it was a Macspeed it would have to be a rogue unit that slipped through. I have no affiliation with Macspeed, but Graeme MacNeill has a fantastic reputation for top quality work here in kiwiland.
Bassman/NZ is offline   Reply With Quote
Old 08-01-2012, 07:19 PM   #174
kenparker
Senior Member
 
kenparker's Avatar
 
Join Date: May 2010
Location: Van, Texas
Posts: 1,122
Default Re: F150 tranny with overdrive

I have been building thes F150 transmiissions for Model A Fords since 1998. I know these gear sets too. Al has the information right on the way to figure the OD %. Subtracting the .70 or .72 or .78 from 100 does not give a true OD %. Subrtacting onlly gives one a numerical figure not a %.

BTW I do not recommend the 41% for the Model A. The 37% only in very special conditions. I drive a 31 Model A coupe with the 27% and a 31 S/W Fordor with a 27% as well as a speedster with the same tranny. I love the combo in all three cars.
kenparker is offline   Reply With Quote
Old 08-02-2012, 10:58 AM   #175
CarlG
Senior Member
 
CarlG's Avatar
 
Join Date: Nov 2010
Location: Anchorage, Alaska
Posts: 8,587
Default Re: F150 tranny with overdrive

The $500 price tag is probably why using the AA bell housing and fabricating a pedal mount is why the guys making the kits do it that way.
CarlG is offline   Reply With Quote
Old 08-03-2012, 03:57 PM   #176
chiliman
Senior Member
 
Join Date: May 2010
Location: Liberty, MO
Posts: 200
Default Re: F150 tranny with overdrive

CarlG What % transmission you running and with what rear end? thanks
chiliman is offline   Reply With Quote
Old 08-03-2012, 04:44 PM   #177
CarlG
Senior Member
 
CarlG's Avatar
 
Join Date: Nov 2010
Location: Anchorage, Alaska
Posts: 8,587
Default Re: F150 tranny with overdrive

4th gear (Overdrive) is .78 which is either 22% or 27% depending on whose math method you use. The rear end ratio is stock Model A, which I believe is 3.78

From my experience, which is only about 1,500 miles, this combination is very acceptable, runs well under 2,000 rpm at 55mph.
CarlG is offline   Reply With Quote
Old 08-03-2012, 07:21 PM   #178
chiliman
Senior Member
 
Join Date: May 2010
Location: Liberty, MO
Posts: 200
Default Re: F150 tranny with overdrive

thanks for the information
chiliman is offline   Reply With Quote
Old 08-06-2012, 03:29 PM   #179
Bassman/NZ
Senior Member
 
Bassman/NZ's Avatar
 
Join Date: May 2010
Location: Napier, New Zealand
Posts: 2,001
Default Re: F150 tranny with overdrive

Next question.... the adaptor plate to mount the torque tube to the trans... is this available, or does it need to be custom made? Also the u-joint... what is used here?
Thanks,
Marty.
Bassman/NZ is offline   Reply With Quote
Old 08-06-2012, 06:00 PM   #180
1931 flamingo
Senior Member
 
1931 flamingo's Avatar
 
Join Date: May 2010
Location: new britain,ct 06052
Posts: 8,702
Default Re: F150 tranny with overdrive

There are kits avail from diff venues for this conversion, either 3 spd or 5 spd. Some require frame mods, some open drive, some closed drive. There's an ad for the conv in every hemmings mag, also ck on the HAMB.
Paul in CT
1931 flamingo is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 03:53 AM.