Increasing the Road Speed of a WD45
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=43483
Printed Date: 20 Aug 2025 at 6:43am
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Topic: Increasing the Road Speed of a WD45
Posted By: OrangeKiwi(NZ)
Subject: Increasing the Road Speed of a WD45
Date Posted: 09 Jan 2012 at 2:33pm
| Other than using larger rear tyres, has anybody got any ideas on how to increase the road speed of a WD45 ? Could the gears in the final drives be changed or reversed ? Tractor caravans or tractor treks in our langauage are run at about 18 mph and I'm looking for an Allis that would keep up, with good economy. |
Replies:
Posted By: Orange Blood
Date Posted: 09 Jan 2012 at 3:35pm
|
Put a diesel rear end and tranny in a gas, or a gas engine, in the frame of a diesel. It's the only thing I can think of. I think there may be some overdrive trans out there, but, I don't know if they work with the WD/WD45 driveline, as there isn't a lot of room for extra parts.
Don't know if you are ever going to get 18 out of her, heck even the top listed speed on a 7060 at 2200 RPM was just barely over 18MPH with the 18.4-34 tires on it. Something sounds fishy, very few older tractors could beat the WD45 on the road. It was known for its "high" road gear, no johny popper beat it that I know of. ------------- Still in use: HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060 Projects: 3-U UC 2-G 2-B 2-C CA 7-WC RC WDLP WF D14 D21 210 7045 N7 |
Posted By: Bill_MN
Date Posted: 09 Jan 2012 at 3:45pm
|
isn't the diesel rear geared lower because of the higher RPMs? I had the same idea but I don't think that's right
------------- 1951 WD #78283, 1918 Case 28x50 Thresher #76738, Case Centennial B 2x16 Plow |
Posted By: Orange Blood
Date Posted: 09 Jan 2012 at 3:52pm
I was wrong, I thought sure the Diesel turned slower, but upon checking the book, the diesel does govern at approximately 200 RPM faster than the gas. ------------- Still in use: HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060 Projects: 3-U UC 2-G 2-B 2-C CA 7-WC RC WDLP WF D14 D21 210 7045 N7 |
Bill_MN wrote:Posted By: Calvin Schmidt
Date Posted: 09 Jan 2012 at 3:53pm
|
14.9 x 38" tires and a 175 govenor spring should get the job done. The diesel rear end will make it slower. ------------- Nothing is impossible if it is properly financed |
Posted By: Dakota Dave
Date Posted: 09 Jan 2012 at 4:03pm
| Must be an international club. 18 MPH is pretty fast on a tractor. |
Posted By: jiminnd
Date Posted: 09 Jan 2012 at 4:04pm
| I do several caravans and think that is tough for a 45, 38 inch tires and different governer spring is best option but may still be hard to get 18mph. just my thoughts. |
Posted By: CTuckerNWIL
Date Posted: 09 Jan 2012 at 4:08pm
|
Take the hand clutch out and add a WC transmission in backwards. Low in the WC and 4th in the 45 might get a little scary at full throttle!!! I have seen a picture of one with the WC tranny in the right way which would give you slower gears.
------------- http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF |
Posted By: OrangeKiwi(NZ)
Date Posted: 09 Jan 2012 at 5:01pm
|
In New Zealand I'm pretty limited as to what axles I can exchange as no D series and only 2 WD45 Diesels came here. I like Charlie's idea of the extra WC gearbox and they're plentiful here. I'll investigate this option further.
As for being an International club trek, they are there but the opposition comes from other British makes, David Brown, Fordson, Nuffield, Massey Ferguson etc. Only good for speeding to the local garage to be repaired, not like AC which were geared for work in the field. I can't see the point in racing between stops on a trek. I thought the whole point was enjoying yourselves and seeing the countryside? I can't seem to convince the other participants that this should be the case. |
Posted By: DrAllis
Date Posted: 09 Jan 2012 at 5:12pm
| Build yourself a little two-wheeled cart for hauling things and have a rearend out of a car underneath it and power it with the tractor PTO....I'd know a full sized Ford car from the 70's will have a 2.50 to 1 rear axle ratio and you just need to figure out what 600 PTO RPM's would give you. Use the cart to haul things related to the ride, like beverages by the case?? |
Posted By: Dusty MI
Date Posted: 09 Jan 2012 at 6:30pm
|
The IHC M was faster on the road than the WD, WD-45. But those Allices would haul a load better, the M's had to shift down on a hill long before the AC's did. Dusty ------------- 917 H, '48 G, '65 D-10 series III "Allis Express" |
Posted By: cwhit
Date Posted: 09 Jan 2012 at 6:31pm
| I'm sure the good Dr. was refering to soft drinks by the case. lol. |
Posted By: tbran
Date Posted: 09 Jan 2012 at 6:56pm
| you guys are great with ideas - I like the car rear end - what about a "C" Allis (not the ED pills) any way to speed this little unit up for tractor rides - 8 mph is tuff my customer found out. |
Posted By: B26240
Date Posted: 09 Jan 2012 at 6:57pm
| When Jim Ringsred brought his 45 home from Aston ID to Fargo ND he fitted it with 38's and they said it went 18mph, some days they made 150 miles. |
Posted By: DrAllis
Date Posted: 09 Jan 2012 at 7:09pm
|
My notes say a WD45 with 14.9 x 38's at 1400 rpm goes 13.8 mph.....at 2000 rpm (D17 governor spring) it would be 19.7 mph. A 14.9 x 38 (63 inch diameter) is just a bit larger in diameter than a 15.5 x 38 (61 inches)....this info is for Firestone rear tires. |
Posted By: DrAllis
Date Posted: 09 Jan 2012 at 7:30pm
| Just now measured my LT245 x 16 pickup tires and they are approx 29 inches tall.......29 x 3.14(pi) is 91 inches in circumference.......At 1700 RPM the PTO runs right at 660 rpm which when going thru a 2.50 to 1 rear axle would be 264 rpm axle speed.....264 x 91 is approx 24,000 inches per minutes or 1,440,000 per hr divided by 12 inches equals 120,000 ft per hr divided by 5280 feet is 22.7 MPH at full throttle.....soooo, with a D17 governor spring at 2000 rpm would be 26.7 mph. Your results may vary. |
Posted By: Eldon (WA)
Date Posted: 09 Jan 2012 at 7:38pm
|
How about a 4x4 front axle under the front powered by the pto? ------------- ALLIS EXPRESS! This year: |
Posted By: Ryan Renko
Date Posted: 09 Jan 2012 at 7:52pm
| Why would you want to go faster?? With no cab, seatbelts or any other safety feature you might be asking for trouble. You wouldnt want to get killed by a person texting, talking on the phone, putting on makeup, and eating a cheeseburger, would ya??? LOL Ryan |
Posted By: XT in pa
Date Posted: 09 Jan 2012 at 8:00pm
|
Dr im very impressed ------------- 190XT,D17and 7045 |
Posted By: TimNearFortWorth
Date Posted: 09 Jan 2012 at 8:07pm
| I for one am liking the heck out of this thread; just what I needed after a very long day! |
Posted By: CTuckerNWIL
Date Posted: 09 Jan 2012 at 8:09pm
|
Ryan he wants to keep up with the tractor drives that run 18+ MPH. I like Eldon's idea, same results as having the pusher trailer but I would think the front wheels pulling would be safer. Add an electric clutch to the PTO and you could take off in 4th with the rear wheels, shift to neutral and engage the PTO for road gear. :)
------------- http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF |
Posted By: Eldon (WA)
Date Posted: 09 Jan 2012 at 8:15pm
------------- ALLIS EXPRESS! This year: |
Posted By: CTuckerNWIL
Date Posted: 09 Jan 2012 at 8:18pm
|
For the mathematicians out there; how fast would the tractor go if you cut the bull gear out and ran the back wheels off the output shaft at the final pinion? I'm guessin a little too fast for 4th gear. ------------- http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF |
Posted By: Orange Blood
Date Posted: 09 Jan 2012 at 8:18pm
|
Well if we are going to all this modification, why not put a blown 454 in the darn thing!!! :-) ------------- Still in use: HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060 Projects: 3-U UC 2-G 2-B 2-C CA 7-WC RC WDLP WF D14 D21 210 7045 N7 |
Posted By: Eldon (WA)
Date Posted: 09 Jan 2012 at 8:21pm
------------- ALLIS EXPRESS! This year: |
Posted By: Eldon (WA)
Date Posted: 09 Jan 2012 at 8:24pm
------------- ALLIS EXPRESS! This year: |
Posted By: DanWi
Date Posted: 09 Jan 2012 at 8:34pm
| They say the little fords with the sherman overdrive is good for road trips. they don't make an overdrive like that for the wd/45? |
Posted By: Eldon (WA)
Date Posted: 09 Jan 2012 at 8:42pm
------------- ALLIS EXPRESS! This year: |
Posted By: Gerald J.
Date Posted: 09 Jan 2012 at 8:54pm
|
Wouldn't take a 4545, just a little inline Ford I block 6 from the late 50s would have enough power and hide under an extended hood better. Maybe even a 2 L overhead cam engine. Gerald J. |
Posted By: Brian G. NY
Date Posted: 09 Jan 2012 at 9:04pm
I don't know how fast it would go forward but it would go like he!! backwards! LOL
|
Posted By: Rfdeere
Date Posted: 09 Jan 2012 at 9:04pm
You could copy this:
 ------------- Randy Freshour,Member Indiana AC Partners, http://www.rumelyallis.com" rel="nofollow - http://www.rumelyallis.com |
Posted By: CTuckerNWIL
Date Posted: 09 Jan 2012 at 11:12pm
Not if you flipped the ring gear over to the other side of the pinion. :) ------------- http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF |
Posted By: HagerAC
Date Posted: 09 Jan 2012 at 11:49pm
|
My WD will do at least 16 mph with 13.6x28 tires and what I believe is a 170 or 175 governor spring in it. ------------- 30+ A-Cs ranging from a 1928 20-35, to a 1984 8070FWA, Gleaner R52 |
Posted By: Dusty MI
Date Posted: 10 Jan 2012 at 6:11am
Just reverse the ring and pinon. Dusty ------------- 917 H, '48 G, '65 D-10 series III "Allis Express" |
Posted By: Brian G. NY
Date Posted: 10 Jan 2012 at 8:52am
|
That reminds me about a friend of my son's (back in the early 80s when they were both teenagers) who turned the rear end over and mounted the springs on top of the pads in his Plymouth to get that "jacked" look.
I guess they were really surprised when they "put her in drive" and proceeded to back up.
I never did see that thing but it couldn't have been pretty! LOL
|
Posted By: CTuckerNWIL
Date Posted: 10 Jan 2012 at 9:16am
As far as I know no one makes these units now and there never was one for the WD or 45. There are a few around for the B-C-CA, and more than a few for the little Fords. Also a few around for the WC.
------------- http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF |