The team's work for other companies eventually ended when their main employer, Total Nonstop Action Wrestling (TNA), requested their wrestlers stop taking bookings with certain independent promotions.

[9][10][11] After Shelley and Sabin had teamed for a few weeks in TNA, Kevin Nash—who had a history with both men and was also a Detroit native—was brought in as their manager, ending his previous alliances with Jay Lethal and Sonjay Dutt in the process,[9] though his association with the group was short lived.

As agreed in the pre–match stipulations, the win resulted in Lethal being given back the X Division title and the members of Team 3D essentially being disqualified from future matches until they could all drop their weight below super heavyweight status.

Styles, Samoa Joe, Jay Lethal, Consequences Creed, Petey Williams, Eric Young and ODB formed a faction of younger wrestlers called The TNA Front Line to oppose The Main Event Mafia.

[23] At Turning Point, Shelley and Sabin received a shot at the TNA World Tag Team Championship, but were defeated by the champions Beer Money, Inc. (Robert Roode and James Storm), after their manager Jacqueline interfered in the match.

[36] Shelley and Sabin received their title shot on the April 12 episode of Impact!, but were defeated by World Tag Team Champion Matt Morgan and Amazing Red, who replaced the injured Hernandez in the match.

[38] On July 11 at Victory Road the Motor City Machine Guns defeated Beer Money, Inc. to win the vacant TNA World Tag Team Championship for the first time.

[39] After Victory Road the Motor City Machine Guns entered a Best of Five Series with Beer Money, Inc., contested for the TNA World Tag Team Championship.

the Motor City Machine Guns defeated Beer Money, Inc. in a Two Out of Three Falls match to win the Best of Five Series and retain the TNA World Tag Team Championship.

[53] On December 5 at Final Resolution the Motor City Machine Guns defeated Generation Me in a Full Metal Mayhem match to retain the World Tag Team Championship.

[64] On April 15 at Lockdown, the Motor City Machine Guns unsuccessfully challenged Magnus and Joe for the TNA World Tag Team Championship in a steel cage match.

[69] On April 28 in Chicago, IL, at Good Times, Great Memories The Briscoe Brothers successfully defended their tag team title against Shelley and Sabin.

In April 2008 Shelley and Sabin returned to Ring of Honor, losing to the Age of the Fall (Tyler Black and Jimmy Jacobs) and defeating the Briscoe Brothers on the 18th and 19th respectively.

[76] On May 8, the Motor City Machine Guns were defeated by the ROH World Tag Team Champions The Kings of Wrestling (Chris Hero and Claudio Castagnoli) via disqualification, when the Briscoe Brothers interfered in the match.

[81][82] On September 22, 2017, at Death Before Dishonor XV, the Motor City Machine Guns defeated The Young Bucks to win the ROH World Tag Team Championship for the first time.

[84][85] On January 4, 2009, Sabin and Shelley defeated No Limit (Tetsuya Naito and Yujiro) at New Japan Pro-Wrestling's Wrestle Kingdom III in Tokyo Dome to win the IWGP Junior Heavyweight Tag Team Championship.

[94] In their return match, the Motor City Machine Guns unsuccessfully challenged The Young Bucks for the IWGP Junior Heavyweight Tag Team Championship.

[95] After defeating the Strong Openweight Tag Team Champions, Aussie Open on the September 15th episode of Impact!, Sabin and Shelley made their return to New Japan Pro-Wrestling at Rumble on 44th Street on October 28.

At the event, the duo defeated Aussie Open to win the Strong Openweight Tag Team Championships, in a three-way match, also involving The DKC and Kevin Knight.

[96] On July 18, 2020, at Slammiversary, Motor City Machine Guns returned to Impact Wrestling and defeated The Rascalz (Zachary Wentz and Dezmond Xavier) after answering their open challenge.

[98] With Shelley out of commission for the next two months, James Storm would fill in as Sabin's partner, defeating XXXL (Acey Romero and Larry D) at Turning Point on November 14.

[101] Moose would replace Shelley in the match at Hard to Kill, and Storm would be brought back to occasionally team with Sabin through the early months of 2021 as The Guns quietly disbanded for the third time.

On the March 2, 2023 episode of Impact, The Motor City Machine Guns lost their titles to Bullet Club members Ace Austin and Chris Bey, ending their reign at 78 days.

[108] On the August 24, 2022, episode of Dynamite, Sonjay Dutt announced that Jay Lethal would team with the Motor City Machine Guns at the All Out PPV, where they would take on Wardlow and FTR in a six-man tag-team match, with Sabin and Shelley set to make their All Elite Wrestling debut.

[112] On the November 15 episode of SmackDown, Shelley and Sabin defended the titles against The Street Profits (Angelo Dawkins and Montez Ford), but the match ended in a no contest after Ciampa attacked both teams.

[114] On the January 10, 2025 episode of SmackDown, The Motor City Machine Guns defeated A-Town Down Under in a first round #1 Contendership match for the WWE Tag Team Championships.

[115] On the January 17 episode of SmackDown, The Motor City Machine Guns faced The Los Garza (Angel and Berto) in the #1 tag team tournament finals and were successful.