Assault Tank M4A3E2 Jumbo

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Arcade Realistic Simulator

Arcade Realistic Simulator

Arcade Realistic Simulator

General info

M4A3E2 Jumbo in the Garage.

The Assault Tank M4A3E2 Jumbo is a Rank III American heavy tank with a battle rating of 4.7. It was one of the first American tanks to be released with the American ground tree in Update 1.45 "Steel Generals". It is built off a standard M4A3 chassis, with a T23 turret with a 75 mm gun, and uparmoured on nearly all sides. This gives the M4A3E2 boasts nearly 100 mm of frontal armour sloped at 47°, giving it a massive armour upgrade from the regular M4 Shermans. As a side note, the nickname "Jumbo" was likely never used during WWII, as there is no record of it. However, its use both on the Wiki and In-Game is still prevalent.

The main purpose, usage and tactics recommendations

General play style

The M4A3E2 looks like a normal Sherman medium tank, but it is still a very heavy tank and is used as a breakthrough tank to attack fortified enemy positions. It is certainly not a medium tank like normal Shermans. It is a great tank when fighting Tigers as the 88mm cannons cannot penetrate the armour of the M4A3E2 from it's sides when angled efficiently. As such it allows players to get close to Tigers and attack them from the sides, or force them to retreat. When fighting Panthers the M4A3E2 is less effective as the 75mm cannon on the Panther can penetrate the armour of the Jumbo Sherman from the front even when angled more than 30 degrees at 500 meters. Only at close range can high-velocity guns, such as Soviet 85mm or German 88mm guns, penetrate the frontal glacis. However, larger calibers, such as the Soviet 122mm gun, will slice right through the armour.

Vehicle characteristics

It takes on the general look of an M4A2, but is much more armoured (and also uses a Ford gasoline engine). The M4A3E2 features the double layered front armour giving the vehicle its distinctive 101.6 mm total front armour, giving its boast of being better armoured than the Tiger I. The transmission housing is also considerably beefier too from an addition of armour at the area as well. The front of the T23-style turret is also distinctive with the very blocky gun mantlet and circular barrel shroud around the rather underwhelming 75 mm gun barrel.

The sides and suspension look like the usual game with the M4 Sherman series, but with minor differences. The flat side armour of the hull, instead of 38.1 mm thick, is now 76.2 mm thick for a much stronger side protection. However, the lower side hull around the bogie suspension area is still only 38.1 mm thick, vulnerable to most regular anti-tank weapons. Another minor difference is the tracks, the T48 rubber chevron tracks are equipped with extended end connectors in an effort to improve ground pressure performance for the additional weight of the armour.

However, the rear does not have any extra armour and is much thinner. The roof of the tank is very thinly armoured as well, only having 19.5 mm on the hull and 25.4 mm on the turret, so beware as artillery barrages tend to set engine compartment modules on fire.

Tactics

The M4A3E2 is best in assaulting enemy positions with allies. Its great mobility for a heavy tank, especially with its armour, makes it a vehicle able to charge into battle and take anything head-on with confidence. It can act as a bullet magnet against enemy tanks more worried about the M4A3E2, diverting fire that would've gone to more vulnerable teammates. Though the 75mm gun's AP performance is not suited to the type of enemies expected at the BR, it can still harass enemies and the gun is lethal enough that enemies will be forced to show their front armour towards the Jumbo else a 75 mm penetrates their side armour. Their focus on the Jumbo can allow allies to move around and eliminate them. During all this, take care not to overangle and show the lower side armour too much as this will allow vehicles to penetrate through down there and damage modules, even the ammunition storage if they are lucky.

Another role the M4A3E2 is good in is as a flanker. Due to its great mobility as a heavy tank, the M4A3E2 Jumbo can maneuver like a medium tank around the battlefield. This is also beneficial to the 75 mm gun as it would permit the M4A3E2 a chance to attack the weaker side armours of enemy vehicles. Once flanking around and finding a prime position in a fire angle right into an enemy chokepoint, minimize exposure to anything but the front armour and the M4A3E2 can remain a formidable obstacle to all opponents. Take care not to be outflanked by enemy players aware of the M4A3E2 position.

Specific enemies worth noting

Due to the M4A3E2 Jumbo having a slightly higher battle-rating than the other M4 Shermans at 4.7, it can be up-tiered against tanks such as the Panther D and Tiger H1, meaning its 75 mm cannon starts becoming less effective. For this reason, it is advisable to take the T45 APCR ammo into battle once unlocked, at least enough to take on the armoured targets the Jumbo will face.

The Soviet 85 mm can be a threat, so caution is advised when going up against tanks armed with the 85 mm, such as the T-34-85, SU-85, and IS-1. The Jagdpanzer 38(t) and Jagdpanzer IV can be tricky when facing off against them. Their frontal armour are too thick and sloped for the 75 mm M3 gun to have any effect on it. For these two targets, it is advised to target their tracks and transmission and then flank for a side shot, where the armour is much weaker. Finally, the Dicker Max wields an 105 mm that can penetrate the front plate of the M4A3E2 Jumbo, so caution is advised against those as well.

Counter-tactics

The M4A3E2 Jumbo presents very little frontal weak spots in an engagement. It is best to try and force the Jumbo to try and angle his vehicle towards the player or his allies. An angle more than 30 degrees can expose the much weaker lower side hull armour in the suspension that is only 38.1 mm thick. With a powerful enough gun, a round can penetrate this area and damage the crew, or even set off the ammunition all cluttered up on the bottom of the tank.

If a frontal engagement is unavoidable and are unfortunately armed with guns unable to penetrate through the front glacis, there are only two areas that are viable. First is the machine gun port, which is one of the areas that is not layered with the extra 38.1 mm added on top of the base armour. Guns like the Panzer IV 75 mm KwK 40 guns that are unable to cleave through the front glacis can push their luck in this area, with small "sweet spots" that the round can pass through. Another way to attack the M4A3E2 in this scenario is exploiting a shot-trap in the gun mantlet. The small corner flaps on the bottom corners of the gun mantlet have a tendency to deflect rounds downwards onto the 19.5 mm hull roof armour. While this will be left to the ricochet chances, it is still possible and can be used if no other scenarios are favorable.

Pros and cons

Pros:

  • Decent 75 mm gun with APCR rounds.
  • High rate of fire for main gun.
  • Excellent gun depression.
  • Very strong turret armour from all sides, very good at hull down position.
  • Very good at leading a spearhead towards a capture point where it can provide cover to weaker allied tanks with more powerful guns.
  • Excellent frontal armour, about 101 mm thick!
  • Excellent all around turret armour, average 152 mm thick!
  • Can absorb a lot of damage.
  • Better mobility than the Russian KV-1 and the British Churchill.
  • Equipped with gun stabilizer, making it more accurate at moving and when preparing a shot after moving.
  • Good acceleration.
  • Incredibly tough when angled.
  • Wide tracks enable it to have a decent off road mobility, unlike other previous Sherman models.
  • Learning curve from previous Sherman variant will help a lot at mastering this tank.

Cons:

  • 75 mm gun lacks penetration against heavy tanks
  • APCR shot is quite expensive, using it as a primary shell will seriously lowers the Silver Lion reward by a large margin.
  • It needs allies support to be effective in battle as it cannot deal serious damage on its own.
  • Armour weak spot above the gun-mantlet (63.5 mm @ 60°).
  • Small bottom corners on M4A3E2 gun mantlet can serve as shot traps.
  • Side armour better than normal, but still weak (76.2 mm), but the lower side hull armour is even worse (38.1 mm).
  • Very thin rear armour.
  • Inability to compound angle greatly due to very weak lower side hull armour that would be penetrated.
  • Tall profile makes it a bigger target.
  • Bad off-road maneuvebility.
  • Low top speed of 35kph.
  • Reverse speed is bad.
  • Hull MG is a weak spot.
  • Due to the layered armor at the front and the armor over-matching mechanic, the upper glacis armor can be dubious in that it does not reliably ricochet shells, particularly those from large caliber guns like the T-34-85.

Specifications

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Armaments

1 x 75 mm Gun M3 (104 rounds)
1 x 12.7 mm Browning M2HB heavy machine gun (600 rounds)
1 x 7.62 mm Browning M1919A4 machine gun (3,000 rounds)

Main armament

1 x 75 mm Gun M3 cannon
  • Ammunition Capacity: 104 Shells
  • Gun Depression: -10°
  • Gun Elevation: 25°
  • Turret Rotation Speed: 14.28°/s (Stock), 19.8°/s (Upgraded), 24°/s (Prior + Full Crew), 26.6°/s (Prior + Expert Qualif.), 28.2°/s (Prior + Ace Qualif.)
  • Reloading Rate: 6.5s (Stock), 5.75s (Full Crew), 5.3s (Prior + Expert Qualif.), 5.0s (Prior + Ace Qualif.)
1 x 75 mm Gun M3 cannon
  • Ammunition Capacity: 104 Shells
  • Gun Depression: -10°
  • Gun Elevation: 25°
  • Turret Rotation Speed: 14.3°/s (Stock), 16.8°/s (Upgraded), 20.4°/s (Prior + Full Crew), 22.56°/s (Prior + Expert Qualif.), 24.0°/s (Prior + Ace Qualif.)
  • Reloading Rate: 6.5s (Stock), 5.75s (Full Crew), 5.3s (Prior + Expert Qualif.), 5.0s (Prior + Ace Qualif.)
1 x 75 mm Gun M3 cannon
  • Ammunition Capacity: 104 Shells
  • Gun Depression: -10°
  • Gun Elevation: 25°
  • Turret Rotation Speed: 14.3°/s (Stock), 16.8°/s (Upgraded), 20.4°/s (Prior + Full Crew), 22.56°/s (Prior + Expert Qualif.), 24.0°/s (Prior + Ace Qualif.)
  • Reloading Rate: 6.5s (Stock), 5.75s (Full Crew), 5.3s (Prior + Expert Qualif.), 5.0s (Prior + Ace Qualif.)
Ammunition
Ammunition Penetration in mm @ 90° Type of
warhead
Velocity
in m/s
Projectile
Mass in kg
Fuse delay in m: Fuse sensitivity in mm: Explosive Mass in
TNT equivalent
in g:
Normalization At 30° from horizontal: Ricochet:
10m 100m 500m 1000m 1500m 2000m 0% 50% 100%
M72 shot 110 109 92 76 62 51 AP 619 6.3 N/A N/A N/A -1° 47° 60° 65°
M48 shell 10 10 10 10 10 10 HE 463 6.3 0.4 0.5 666 +0° 79° 80° 81°
M61 shot 90 88 81 73 65 59 APCBC 618 6.8 1.2 20 63.7 +4° 48° 63° 71°
T45 shot 143 137 127 106 86 70 APCR 868 3.8 N/A N/A N/A +1.5° 66° 70° 72°
Ammunition Type of
warhead
Velocity
in m/s
Projectile
Mass in kg
Screen radius
in m
Screen time
in s
Screen hold time
in s:
Explosive Mass in
TNT equivalent
in g:
M89 Smoke 259 3 13 5 20 50
Ammo racks
Ammo racks of the M4A3E2 "Jumbo".
Full
ammo
1st
rack empty
2nd
rack empty
3rd
rack empty
Recommendations Visual
discrepancy
104 101 (+3) 51 (+53) (+103) Turret empty: 101 (+3) No

Secondary armaments

1 x 12.7 mm M2HB heavy machine gun (pintle mount)
1 x 7.62 mm M1919A4 machine gun (coaxial)

Crew

  • Commander
  • Gunner
  • Loader
  • Driver
  • Assistant Driver

Total: 5 Crew members

Armour

Armour type:

  • Rolled homogeneous armour (Front, Side, Rear, Roof)
  • Cast homogeneous armour (Turret, Transmission area)
Armour Front (Slope angle) Sides Rear Roof
Hull 63.5 + 38.1 mm (47°) Front glacis
114.3-139.7 mm (7-66°) Transmission housing
76.2 mm Top
38.1 mm Bottom
38.1 mm (10°) Top
38.1 mm (7-24°) Bottom
19.5 mm
Turret 152.4 mm (0-52°) Turret front
177.8 mm (4-60°) Gun mantlet
152.4 mm (4-42°) 152.4 mm (0-79°) 63.5 mm Front
25.4 mm
Armour Sides Roof
Cupola 51 mm 25.4 mm

Notes:

  • Suspension wheels are 15 mm thick, the bogies are 10 mm thick, and tracks are 17 mm thick.
  • Belly armour is 25.4 mm thick.
  • Hull underside right above the tracks are 9.5 mm thick.
  • Gun breech is 300 mm thick in structural steel.

Engine & mobility

Weight: 37.8 ton

Max Speed: 38 km/h
Stock

  • Engine Power: 646 hp @ 2600 rpm
  • Power-to-Weight Ratio: 17.09 hp/ton
  • Maximum Inclination: 40°

Upgraded

  • Engine Power: 795 hp @ 2600 rpm
  • Power-to-Weight Ratio: 21.03 hp/ton
  • Maximum Inclination: 43°
Weight: 37.8 ton

Max Speed: 35 km/h
Stock

  • Engine Power: 442 hp @ 2600 rpm
  • Power-to-Weight Ratio: 11.69 hp/ton
  • Maximum Inclination: 40°

Upgraded

  • Engine Power: 500 hp @ 2600 rpm
  • Power-to-Weight Ratio: 13.23 hp/ton
  • Maximum Inclination: 41°
Weight: 37.8 ton

Max Speed: 35 km/h
Stock

  • Engine Power: 442 hp @ 2600 rpm
  • Power-to-Weight Ratio: 11.69 hp/ton
  • Maximum Inclination: 40°

Upgraded

  • Engine Power: 500 hp @ 2600 rpm
  • Power-to-Weight Ratio: 13.23 hp/ton
  • Maximum Inclination: 41°

Modules and improvements

Tier Mobility Protection Firepower
I Tracks tank module.jpg Parts tank module.jpg Horizontaldrive tank module.jpg
II Suspension tank module.jpg Brakesystem tank module.jpg FPE tank module.jpg Adjustmentoffire tank module.jpg APCBC M61 tank module.jpg
III Filters tank module.jpg Crewreplenishment tank module.jpg Elevationmechanism tank module.jpg APCR T45 tank module.jpg
IV Transmission tank module.jpg Engine tank module.jpg Smoke M89 tank module.jpg

Recommendation:
In Tier I, Parts and Horizontal Drive should of course be the prioritized modules for repairs and turret traverse speed. These two will also unlock Tier II modifications and grant access to the very vital FPE and M61 shot, the former for preservation against fires and the latter to improve damage in the battlefield.

Then in Tier III, Crew Replenishment should be obtained for crew survival improvement and the APCR T45 shot for improved armour-piercing power. After that, everything else could be done at one's own priorities, but Engine should be invested for better automotive performances and M89 for the smoke capabilities.

History of creation and combat usage

Development

Even before the invasion of Normandy, the Allied commanders had to figure out a method in order to breach heavily-defended fortification lines such as the Siegfried Line blocking the path from France to Germany. One of the solutions was for the implementation of "assault tanks" to enter enemy territory and root out the enemy fortifications. The initial plan was for the production of the M26 Pershing tanks to fulfill this role, but setbacks in its development caused the M26 deployment to be delayed until 1945. A quick solution must be made to fill this "assault tank" role for the invasion of Europe in 1944.

The US ordinance then took their abundant M4 Shermans in stock and fixed them up for the new role they've been assigned in. Although keeping the same engine, the armour was upped from around 76.2 mm initial thickness to 102 mm and angled at 47 degrees from vertical. This angle would influence later Sherman design such as the M4A3 by changing the original 56 degree angled glacis with protruding crew hatches to 47 degree angled glacis without any protrusion from the crew hatches. This modified M4 Sherman's armour when angled would then be 150 mm line-of-sight (LOS) thick and 180 mm effective. The side armour is also increased to 76.2 mm thick and the turret is redesigned to provide more protection. These modified Shermans were designated the M4A3E2 by the Ordnance Department, whereas the nickname "Jumbo" was likely a post-war invention. At the end of the modifications, the Sherman "Jumbo" now weighed about 42 tons and moves a lower speed of 22 miles per hour. A drawback to the increased weight of the Sherman is that the Vertical Volute Suspension System (VVSS) from the Sherman was unable to take the weight easily, so extra care was taken by the crew members to not break the suspension.

In March of 1944, the US Army ordered for 254 of these vehicles to be delivered for use for European Operations. Intended for the assault on the Normandy Beachhead, it was deployed in Normandy after D-Day to assist the infantry push through German defenses. The M4A3E2 originally came with the 75 mm guns to support infantry with its better HE shells compared to the planned 76 mm installment, but the 76 mm was installed later in the campaign and called the M4A3E2 (76) W Jumbo.

Combat usage

The M4A3E2 were well-liked by the crew and commanders due to its protection value. Despite the weight difference and strain on the suspension, it performed reliably and could absorb damage that would otherwise destroy regular Shermans. Later in the war, when the quantity of the M4 Sherman "Jumbos" were unable to meet the demand, George S. Patton ordered for existing M4 Shermans to weld on armour plates scavenged from knocked out tanks to makeshift "on-the-field" Jumbos. This caused the newer shermans such as the M4A3 (76) W HVSS could have the same protection by welding metal onto the hull. One of the Jumbo's notable participation in the war was in Patton's Third Army where it spearheaded the assault to Bastogne to relieve the pinned down 101st Paratroopers (though they deny needing a "rescue").

When war in the European Theater ended, the M4A3E2s were then placed stateside for the preparation for the invasion of the Japanese Home Islands. However, this was never to be fulfilled as Japan then surrendered to the United States in September 1945. The M4A3E2 Shermans proved to be a very effective stop gap solution until heavier armoured tanks such as the Pershing could come into play. In 1948, about 96 Sherman Jumbos still remained in US inventory.

Screenshots and fan art

Skins and camouflages for the _____ from live.warthunder.com.

Additional information (links)

References


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us_m4a3e2_sherman_jumbo.png

Icon-country-usa.png M4A3E2
Nation USA
Type Heavy tank
Rank 3
Battle Rating
4.7
4.7
4.7

   Metric✓       Imperial   

   Metric       Imperial✓   

Characteristics
Weight
37,800 kg
83,334 lb
Number of Crew 5
Hull armour thickness
101.6/76.2/38.1/19.5 mm
4.0/3.0/1.5/0.77 inches
Statistics
Engine power (stock)
646 hp
442 hp
442 hp
Engine power (upgraded)
795 hp
500 hp
500 hp
HP/ton ratio (stock)
17.09
17.36
11.69
11.88
11.69
11.88
HP/ton ratio (Upgraded)
21.03
21.37
13.23
13.44
13.23
13.44
Max speed
38 km/h
23.3 mph
35 km/h
21.9 mph
35 km/h
21.9 mph
Main Weapon
1 x 75 mm M3 Cannon
Ammo stowage 104 rounds
Vertical guidance -10°/25°
Secondary Weapon
1 x 12.7 mm M2HB Heavy machine gun
Ammo stowage 600 rounds
Mount Pintle mount
Vertical guidance -10°/30°
Horizontal guidance -60°/60°
1 x 7.62 mm M1919A4 Machine gun
Ammo stowage 3,000 rounds
Mount Coaxial
Economy
Required RP 54,000 RP
Vehicle cost 180,000 SL
Crew training cost 52,000 SL
Max repair cost*
4,300 SL
2,950 SL
2,210 SL
Free repair time (Stock)
3d 06h
5d 15h
4d 15h
Free repair time (Upgraded)
1d 02h
1d 21h
1d 13h
Warning: this sidebar is a WIP and can be incorrect. Last updated 1.77.2.170.