Diesels Unlimited Inc

Diesels Unlimited Inc We perform all automotive repair and services while specializing in high performance transmission building.

48re together and ready to head out the door. Build features sonnax billet input/intermediate/output shaft with extra fr...
08/27/2026

48re together and ready to head out the door. Build features sonnax billet input/intermediate/output shaft with extra frictions throughout as well as a Goerend Transmission high pressure valve body and transmission pan!

Lml Duramax in for a built Allison this week. For all your high performance transmission needs feel free to reach out so...
07/30/2026

Lml Duramax in for a built Allison this week. For all your high performance transmission needs feel free to reach out so we can help you get the most out of your vehicle!
443-619-0813
[email protected]

We have been pretty busy around here and havnt had time to post. Appreciate everyone’s patience. Here’s a little of what...
07/24/2026

We have been pretty busy around here and havnt had time to post. Appreciate everyone’s patience. Here’s a little of what we’ve been up to lately!

Banks intake horn on a 4th gen Cummins so the nut doesn’t break off and go into the engine and destroy it. We can get these or have the fleece kits in stock!

A bunch of 68rfe, 4l80e, 6l80e and Allison transmission builds (these are pretty much our normal)

10r140 with a busted rear geartrain in it.

4th Cummins that came in smoking and popping when cold. Did our due diligence for the customer to find out it had 6 bent rods. (None of the pistons actually protruded above the deck). This truck will be getting a freedom long block.

And of course Duramax head gaskets. Just wrapped up an lly that had to get new fleece heads, studs and gaskets and to out surprise the turbocharger shaft was snapped when we pulled the intake so got him swapped with a new Garrett oem. Also have an lml that just got new gaskets, studs, glow plugs, radiator etc ready to be picked up.

Call to get on the schedule today!
443-619-0813
[email protected]

We are closed today and will be back in the shop Monday. We are getting caught up on an abundance of backlogged work and...
07/03/2026

We are closed today and will be back in the shop Monday. We are getting caught up on an abundance of backlogged work and hope to caught back up in the next week or two. We appreciate everyone’s business and support!

Happy 4th of July
Happy birthday America!! 🇺🇸

07/01/2026

Ok we’re back online everyone. I don’t have any calls/texts from after 4pm yesterday so if you reached out after that, you’ll want to reach out again.
443-619-0813
[email protected]

07/01/2026

Probably won’t have any phone lines this am. Had a small mishap with the shop phone using hot spot and it’s no longer with us ☠️
Will post when we’re back up and running.

6 speed Allison downDon’t let this be you 😅 if you have a whining from your transmission this is a high probability of i...
06/25/2026

6 speed Allison down

Don’t let this be you 😅 if you have a whining from your transmission this is a high probability of it being the issue and unfortunately you need an entire gear train replacement

Here is a 3rd gen that received a plethora of upgrades including our tow trans, new injector lines, oil pan replacement,...
04/07/2026

Here is a 3rd gen that received a plethora of upgrades including our tow trans, new injector lines, oil pan replacement, mishimoto transmission cooler and fass with a sump. Call to schedule your repair or upgrades today!
443-619-0813

Lb7 in for a set of head gaskets and studs, as well as a stage 1 Allison build. We also sent his injectors out to be tes...
04/02/2026

Lb7 in for a set of head gaskets and studs, as well as a stage 1 Allison build. We also sent his injectors out to be tested while apart to ensure it won’t have to come apart for a long time 👊🏻 call to get on our schedule!
443-619-0813
[email protected]

We just finished up this 2025 Chevy 3500. It received our stage 2 10l1000 build. It had a really bad E clutch failure we...
03/24/2026

We just finished up this 2025 Chevy 3500. It received our stage 2 10l1000 build. It had a really bad E clutch failure we couldn’t even get the drum apart and had to replace it due to the metal inside basically welding itself to the drum. It got a modified valve body, extra e & f clutch and of course a Goerend triple disc converter.
443-619-0813
[email protected]

Address

555 Blue Ball Road
Elkton, MD
21921

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm

Telephone

+14436190813

Website

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