Looking for something to use to determine if the M151 we have is a M151 or an a1. I am not finding much literature to use as reference. The Jeep was a family inheritance with ho history. There is a 1-68 data plate on the jeep held on with Phillips head screws so we question its originality. Are there any books that would show the differences between the 151 and the a1?
Thanks,
Robert
What are the differences between a M151 and a M151A1
Moderators: rickf, raymond, Mr. Recovery
Re: What are the differences between a M151 and a M151A1
The 151 didn't have blinkers whereas the A1 did.Maybe no black out lites either, maybe 3 ribs on hood(151), my 151 has data info on the left front rail? The 151 had a holly carburetor.
mark
1968 m274A5
1960 m151
1981 m151A2
1964 m416
1971 m416
1968 m274A5
1960 m151
1981 m151A2
1964 m416
1971 m416
Re: What are the differences between a M151 and a M151A1
when you look at the right rear corner, above the tail light, is there an opening punched in the body, and a small recessed black out light mounted there? A1's had that light, straight 151's didn't.
Re: What are the differences between a M151 and a M151A1
I'm gonna say it....
Don't make me say it....
Nope. I'm gonna say it....
Let's see some pictures!
Don't make me say it....
Nope. I'm gonna say it....
Let's see some pictures!
Re: What are the differences between a M151 and a M151A1
Straight 151's also had oval floor drains and A1's had scalloped floor drains. A1's had turn signals mounted on welded in reinforcing plates in the front fenders and the third light in the rear mentioned above. Some but not all straight 151's had two cowl vents in front of the windshield, The A1 would only have one on the passenger side and only if it has a heater. No heater no vent. The data plate were held in with screws.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
Re: What are the differences between a M151 and a M151A1
I’ve collected the following information from this and other forums and websites over the years. I value your input, corrections or additions.
Regards, Chucho
5 Mutts and 3 M416 trailers over the last 47 years, all now departed except 1 ea.1960 Run 1 M151 with 1964 M416 trailer.
MUTT features for determining 151, A1 or A2:
1. (Early) M151 equipped with Holly carburetor. Later models had Zenith carburetor
2. Air cleaner is flat on top with screened cover. Later models have circular indentions.
3. Rear swing arms with 2 rubber bumpers, also M151A1. The structural difference between an M-151 and an M-151A1 are as follows.
A. The M-151 rear suspension arms only have one rubber snubber to keep the arm from bottoming out. The A1 has two.
B. The M-151's rear hub assembly is fastened to the rear A-arms by 4 bolts. The A1 has six bolts.
c. The A-arms themselves, on the A1, have more reinforcement added, but it is hard to tell unless you know what you are looking for. These upgrades were made due to rear suspension and hub assembly failures from overloading the rear of the vehicle. There was a Modification Work Order (MWO) out on this. It stated that if you have an A-arm failure or cracking or have a hub failure, then replace with the stronger A-arms and hubs. If only one side was affected, you were to replace both sides. There was no mixing or matching. After that, the data plate was to be over stamped to indicate that it was now an M-151A1. Therefore, you could have an A1 model with no T/S mounted. M151A2 suspension changed to trailing arm type.
4. Driver’s seat has screw type adjustment and passenger seat has 2 adjustment slots for adjustment. All later models had the 2 adjustment slots on both front seats.
5. Rear bench seat has footman loops with straps underneath to hold the top when folded for storage. A1’s did not have footman loops and no provisions for storing top. A2’s models had support legs under seat.
6. Hand brake has a push button on top for releasing the brake when set and must be adjusted from underneath the vehicle. Later models had a pivot type hand brake leaver with an adjustment on top of lever.
7. Hood has 3 chevron ribs. Later models have 2 chevron ribs.
8. Hood latches are single horn. Later models are double horn.
9. No factory turn signals or dimples on hood for wiring.
10. Front bumper is not tapered at the ends. Later models are tapered and are heavier gauge.
11. Floor drains are oval with 2 half-moon shaped holes with spring loaded cap. Drains on later models are slots in the front of the floor where it turns up under the dash and drains to the side of body.
12. Two bolt holes for mirror bracket at top center on windshield with footman loop for strap to secure windshield to hood when down position.
13. No evidence of turn signal switch on steering column.
14. Slotted hole for top jerry can strap (Fruehauf body M151). Later model used footman loop on top of body
15 No rear B/O light on right rear side. A1 equipped with B/O recessed into body. A2 B/O is incorporated into rear tail light fixtures.
16. Brackets for shovel D handle in addition to shovel scoop holder. Later models only have scoop holder.
17. (Early) M151 has 2 cowl flip up vents and 2 defroster slots per side. A1 and later windshield has 4 defroster slots per side.
18. Windshields have canvas covered hood rest. Later models had rubber rest.
19. Some (early) M151 engines had SN numbers cast into engine. Later models had engine data plate with stamped SN numbers.
20. Body tag is located on driver’s side frame rail underneath radiator on Fords and on passenger side frame rail adjacent to vacuum pump on Willys and Kaiser. A1’s and AMG’s location is on center of cowl just behind engine valve cover.
21. Spare tire retainer is round with reflector attached to bottom.
22. Riveted re-enforcing plate between and just behind the two front seats.
23. Most were manufactured by Ford and hood numbers were (2B, 2C or 2D series).
24. Manufactured years: 1959 – 1964.
25. Early M151 Contract numbers: Ford DA-20-018- ORD-21125 4 050, 25 Jun 1959 and Ford DA-20-018- ORD-23240 13 124, 28 Apr 1961, contract unit price - $2,250.00.
Hood Numbers
Willys and Kaiser M151 vehicles were given registration (hood) numbers in the "2D-" "2E-" and "2F-" range. The military did not consider them as Ford, Kaiser, AMG and/or other brand, only a NSN number.
The US Army changed the system for numbering their vehicles in 1958/9 (they did this several times during the 60's and 70's). The first vehicles to be assigned the "2A"-series of numbers were M38A1 jeeps. The M38A1series used up the entire 2A sequence and part of the 2B sequence as well. By the time M151 deliveries began, the serial numbering was already into the 2B sequence and the M151 Army registration numbers started about half-way through the 2B's.... somewhere around the 2B 4xxx number.
M151A1 units built and delivered had hood/registration numbers under the US Army numbering system of the time, in the format of one number followed by one letter followed by four numbers.
This was changed when the M151A2 came out under the Ford contract (1970) following the US Army Registration numbering plan change at the time, continuing on with the follow-on AMG contracts to two numbers followed by two letters followed by four numbers. All M151A2 units had this hood number format in US Army service, until the currently used 6 position Alpha Numeric system went into use. (NG0NLO etc.).
The last 2 numbers of the A2 hood number is the vehicle year. The 02 at the beginning indicates size/class (eg.1/4 ton tactical truck). The 2 letters and the first 2 numbers are the actual contract production line serial number. In many (most) cases the hood numbers or the hoods themselves have been switched on AMG A2 vehicles (for obvious reasons) as well as the Data Plates, so you have to be doubtful of the originality of any of these items unless proven otherwise. An example would be an A2 with A1 type US Army registration numbering format above which stands right out.
M151, A1 and A2 Contract numbers
( according to the Mutt Guru) @ http://www.g838.org/viewtopic.php?f=3&t=2039
Ford DA-20-018- ORD-21125 4 050, 25 Jun 1959 - 1st contract unit price - $2,250.00
Ford DA-20-018- ORD-23240 13 124, 28 Apr 1961
Willys DA-33-019-ORD-3491 14 625, 21 May 1962 - contract unit price - $2,762.00
Willys DA-20-113-AMC-0846-(T) 9 883, 14 Dec 1962
Ford DA-20-113-AMC-02787(T)(MYP) 7 500, 16 Feb 1964 - Contract unit price - $2,367.00
Ford DA-20-113-AMC-07507(T)(MYP) 42 000, 30 Jun 1965 - Contract unit price - $2,049.00
Ford DAAE-06-68-C-0001(MYP) 49 377, 26 Sep 1967 - Contract unit price - $2,722.00
AMG DAAE-07-71-C-0103-(MYP) 34 984, 16 Feb 1971- Contract unit price - $3,277.00
AMG DAAE-07-77- Contract unit price - 1977 - $7,892.00
AMG DAAE-07-82- Contract unit price - 1982 - 12,340.00
AMG DAAE-0?-??- Contract unit price - M151A2 (final version w/ROPS) - $22,128.00
M151 NSN 2320-00-542-4783 Mfg. by Ford, then Willys, then Kaiser
Body tubs Mfg. by: Fruehauf Trailer (Willys & Kaiser) Budd Corp. (Ford).
M151 series painted with Camouflage pattern did not have hood numbers.
Proper position of gas can is on left rear bumperette with spout opening to the right towards the spare tire to prevent any spillage from can opening onto exhaust pipe end.
Regards, Chucho
5 Mutts and 3 M416 trailers over the last 47 years, all now departed except 1 ea.1960 Run 1 M151 with 1964 M416 trailer.
MUTT features for determining 151, A1 or A2:
1. (Early) M151 equipped with Holly carburetor. Later models had Zenith carburetor
2. Air cleaner is flat on top with screened cover. Later models have circular indentions.
3. Rear swing arms with 2 rubber bumpers, also M151A1. The structural difference between an M-151 and an M-151A1 are as follows.
A. The M-151 rear suspension arms only have one rubber snubber to keep the arm from bottoming out. The A1 has two.
B. The M-151's rear hub assembly is fastened to the rear A-arms by 4 bolts. The A1 has six bolts.
c. The A-arms themselves, on the A1, have more reinforcement added, but it is hard to tell unless you know what you are looking for. These upgrades were made due to rear suspension and hub assembly failures from overloading the rear of the vehicle. There was a Modification Work Order (MWO) out on this. It stated that if you have an A-arm failure or cracking or have a hub failure, then replace with the stronger A-arms and hubs. If only one side was affected, you were to replace both sides. There was no mixing or matching. After that, the data plate was to be over stamped to indicate that it was now an M-151A1. Therefore, you could have an A1 model with no T/S mounted. M151A2 suspension changed to trailing arm type.
4. Driver’s seat has screw type adjustment and passenger seat has 2 adjustment slots for adjustment. All later models had the 2 adjustment slots on both front seats.
5. Rear bench seat has footman loops with straps underneath to hold the top when folded for storage. A1’s did not have footman loops and no provisions for storing top. A2’s models had support legs under seat.
6. Hand brake has a push button on top for releasing the brake when set and must be adjusted from underneath the vehicle. Later models had a pivot type hand brake leaver with an adjustment on top of lever.
7. Hood has 3 chevron ribs. Later models have 2 chevron ribs.
8. Hood latches are single horn. Later models are double horn.
9. No factory turn signals or dimples on hood for wiring.
10. Front bumper is not tapered at the ends. Later models are tapered and are heavier gauge.
11. Floor drains are oval with 2 half-moon shaped holes with spring loaded cap. Drains on later models are slots in the front of the floor where it turns up under the dash and drains to the side of body.
12. Two bolt holes for mirror bracket at top center on windshield with footman loop for strap to secure windshield to hood when down position.
13. No evidence of turn signal switch on steering column.
14. Slotted hole for top jerry can strap (Fruehauf body M151). Later model used footman loop on top of body
15 No rear B/O light on right rear side. A1 equipped with B/O recessed into body. A2 B/O is incorporated into rear tail light fixtures.
16. Brackets for shovel D handle in addition to shovel scoop holder. Later models only have scoop holder.
17. (Early) M151 has 2 cowl flip up vents and 2 defroster slots per side. A1 and later windshield has 4 defroster slots per side.
18. Windshields have canvas covered hood rest. Later models had rubber rest.
19. Some (early) M151 engines had SN numbers cast into engine. Later models had engine data plate with stamped SN numbers.
20. Body tag is located on driver’s side frame rail underneath radiator on Fords and on passenger side frame rail adjacent to vacuum pump on Willys and Kaiser. A1’s and AMG’s location is on center of cowl just behind engine valve cover.
21. Spare tire retainer is round with reflector attached to bottom.
22. Riveted re-enforcing plate between and just behind the two front seats.
23. Most were manufactured by Ford and hood numbers were (2B, 2C or 2D series).
24. Manufactured years: 1959 – 1964.
25. Early M151 Contract numbers: Ford DA-20-018- ORD-21125 4 050, 25 Jun 1959 and Ford DA-20-018- ORD-23240 13 124, 28 Apr 1961, contract unit price - $2,250.00.
Hood Numbers
Willys and Kaiser M151 vehicles were given registration (hood) numbers in the "2D-" "2E-" and "2F-" range. The military did not consider them as Ford, Kaiser, AMG and/or other brand, only a NSN number.
The US Army changed the system for numbering their vehicles in 1958/9 (they did this several times during the 60's and 70's). The first vehicles to be assigned the "2A"-series of numbers were M38A1 jeeps. The M38A1series used up the entire 2A sequence and part of the 2B sequence as well. By the time M151 deliveries began, the serial numbering was already into the 2B sequence and the M151 Army registration numbers started about half-way through the 2B's.... somewhere around the 2B 4xxx number.
M151A1 units built and delivered had hood/registration numbers under the US Army numbering system of the time, in the format of one number followed by one letter followed by four numbers.
This was changed when the M151A2 came out under the Ford contract (1970) following the US Army Registration numbering plan change at the time, continuing on with the follow-on AMG contracts to two numbers followed by two letters followed by four numbers. All M151A2 units had this hood number format in US Army service, until the currently used 6 position Alpha Numeric system went into use. (NG0NLO etc.).
The last 2 numbers of the A2 hood number is the vehicle year. The 02 at the beginning indicates size/class (eg.1/4 ton tactical truck). The 2 letters and the first 2 numbers are the actual contract production line serial number. In many (most) cases the hood numbers or the hoods themselves have been switched on AMG A2 vehicles (for obvious reasons) as well as the Data Plates, so you have to be doubtful of the originality of any of these items unless proven otherwise. An example would be an A2 with A1 type US Army registration numbering format above which stands right out.
M151, A1 and A2 Contract numbers
( according to the Mutt Guru) @ http://www.g838.org/viewtopic.php?f=3&t=2039
Ford DA-20-018- ORD-21125 4 050, 25 Jun 1959 - 1st contract unit price - $2,250.00
Ford DA-20-018- ORD-23240 13 124, 28 Apr 1961
Willys DA-33-019-ORD-3491 14 625, 21 May 1962 - contract unit price - $2,762.00
Willys DA-20-113-AMC-0846-(T) 9 883, 14 Dec 1962
Ford DA-20-113-AMC-02787(T)(MYP) 7 500, 16 Feb 1964 - Contract unit price - $2,367.00
Ford DA-20-113-AMC-07507(T)(MYP) 42 000, 30 Jun 1965 - Contract unit price - $2,049.00
Ford DAAE-06-68-C-0001(MYP) 49 377, 26 Sep 1967 - Contract unit price - $2,722.00
AMG DAAE-07-71-C-0103-(MYP) 34 984, 16 Feb 1971- Contract unit price - $3,277.00
AMG DAAE-07-77- Contract unit price - 1977 - $7,892.00
AMG DAAE-07-82- Contract unit price - 1982 - 12,340.00
AMG DAAE-0?-??- Contract unit price - M151A2 (final version w/ROPS) - $22,128.00
M151 NSN 2320-00-542-4783 Mfg. by Ford, then Willys, then Kaiser
Body tubs Mfg. by: Fruehauf Trailer (Willys & Kaiser) Budd Corp. (Ford).
M151 series painted with Camouflage pattern did not have hood numbers.
Proper position of gas can is on left rear bumperette with spout opening to the right towards the spare tire to prevent any spillage from can opening onto exhaust pipe end.
Last edited by Chucho on August 31st, 2017, 10:56 am, edited 2 times in total.
Re: What are the differences between a M151 and a M151A1
Well! THAT is about as complete of a list as you will ever find. Most newcomers come on asking questions and you jump in with this. WOW.
Thanks.
Thanks.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
Re: What are the differences between a M151 and a M151A1
wasn't that in our wiki? Back then when it still worked?
Horst
1972 USMC M151A2 w/ROPS (ex Barstow) and M416
1962 M201 and trailer
1966 GTO,1982 E350 Skoolie, 1987 SJ413, 1987 911
Gone: 2xM35A2c, Unimog 404S, Hanomag AL28, DKW Munga
1972 USMC M151A2 w/ROPS (ex Barstow) and M416
1962 M201 and trailer
1966 GTO,1982 E350 Skoolie, 1987 SJ413, 1987 911
Gone: 2xM35A2c, Unimog 404S, Hanomag AL28, DKW Munga
Re: What are the differences between a M151 and a M151A1
Some of it. I still reference the Wiki but you know more than me about it. What is not working? I know it is showing me that it wants tons of updates but it only show the mods that.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone
Re: What are the differences between a M151 and a M151A1
not only the mods, I see the same tons of messages that calls are deprecated. All the text is still there, it actually has a quite long list on the specifics of the M151 vs M151A1. Of course pretty much all links to pictures are broken now.
Horst
1972 USMC M151A2 w/ROPS (ex Barstow) and M416
1962 M201 and trailer
1966 GTO,1982 E350 Skoolie, 1987 SJ413, 1987 911
Gone: 2xM35A2c, Unimog 404S, Hanomag AL28, DKW Munga
1972 USMC M151A2 w/ROPS (ex Barstow) and M416
1962 M201 and trailer
1966 GTO,1982 E350 Skoolie, 1987 SJ413, 1987 911
Gone: 2xM35A2c, Unimog 404S, Hanomag AL28, DKW Munga