Ultramatic Diesel Performance

Ultramatic Diesel Performance Diesel Repair, Performance, and Transmissions

12/22/2025

Wishing everyone a Merry Christmas and a Happy New Year! Our CLOSED holiday schedule is as follows:
Wed. December 24, 2025 8:00-1:00P.M.
Thur. December 25 and 26 we are CLOSED.
Thur January 1, 2026 we are CLOSED.

Happy Thanksgiving!!We're thankful for each and every one of our customers!   Our shop will be closed today and tomorrow...
11/27/2025

Happy Thanksgiving!!

We're thankful for each and every one of our customers!

Our shop will be closed today and tomorrow as we celebrate the holiday with family and friends. We'll be back in the office Monday morning!

Evening everyone! We have been slammed with business here at Ultramatic Diesel and we want to thank everyone for their p...
08/28/2024

Evening everyone! We have been slammed with business here at Ultramatic Diesel and we want to thank everyone for their patience and giving us the opportunity to work on their rides!

We did want to announce that we will be CLOSED on Labor Day, Sept 2nd. We will be back in the office on Tuesday to return calls, messages, and be back on the grind! Thank you again, we couldn't do this without our loyal customers!

Hello Everyone! Just wanted to hop on and let everyone know that we will be CLOSED tomorrow and Friday (July 4th and Jul...
07/03/2024

Hello Everyone!

Just wanted to hop on and let everyone know that we will be CLOSED tomorrow and Friday (July 4th and July 5th) for the holiday. We will be back Monday.

We hope everyone has a blessed and safe July 4th 🎇

Happy Friday! Just wanted to hop on and let everyone know we will be closed Monday, May 27th, for the holiday. We will r...
05/24/2024

Happy Friday! Just wanted to hop on and let everyone know we will be closed Monday, May 27th, for the holiday.

We will reopen with normal business hours on Tuesday, May 28th - we hope everyone has a blessed weekend!

PM US FOR MORE INFO!
01/29/2024

PM US FOR MORE INFO!

We will be closed Monday, December 25th, so our employees can spend the holiday with their families. We will reopen Tues...
12/23/2023

We will be closed Monday, December 25th, so our employees can spend the holiday with their families.

We will reopen Tuesday, December 26th!

Thank y'all and Happy Holidays!

** Just wanted to let our customers know that we will be closed  Thursday 11/23 and Friday 11/24 for the Thanksgiving ho...
11/20/2023

** Just wanted to let our customers know that we will be closed Thursday 11/23 and Friday 11/24 for the Thanksgiving holiday!

We will be returning all phone calls/messages received on those days on our following open day, Monday 11/27 -

Thank you and Happy Thanksgiving!

***68RFE PRICING***We here at Ultramatic Diesel Performance LLC specialize in especially in the 68rfe transmissions alon...
10/24/2023

***68RFE PRICING***

We here at Ultramatic Diesel Performance LLC specialize in especially in the 68rfe transmissions along with the 47/48res, 6r140s 5r110s and the allisons!
We take pride in making 68rfes great again and are pleased to announce we currently have the fastest 68rfe truck on the planet!!! Full weight 4 door that has went 6.53 at 108 in the 1/8 and has made over 2,100hp on the dyno! The 68rfes are very poorly designed and tuned in factory form which leads to a bad reputation of failing.. When it comes to reliability they take very specific parts, especially when it comes to clutch material, valve upgrades, clutch pack capacity and more.. With over 7 years of experience on these transmissions we have come up with the proven builds listed below fitting the most important parts possible into each level. Different levels of builds and warranty so we can fit your budget and needs best! There are more custom specs not listed we also do for each build level!
Transmission tuning is the heartbeat of the 68rfes!
We do require our or approved 225 psi trans tuning on all builds..
Shipped prices are same as installed pricing at up to 1500 mile radius..
2019+ trucks are more expensive so please inquire about that if yours is the 19+.
All prices are plus tax, fluid and a good core!

**Stage 1 500hp build(1 Year VERY Limited warranty)**

With following upgrades -

Added OD clutches for holding capacity

Switch valve reamed for oversized upgraded valve in valve body

Shift kit

Bonded gasket to help cross leaks

Modifications for 225psi

Upgraded Pump with new sonnax valves

Billet cover dual disk converter

Stock pan

$4,599 installed (PRICE DOES NOT INCLUDE FLUID OR TAX)

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**Stage 2 600hp build(2 year limited warranty)**

Mods include all of stage 1 plus -

Billet input shaft

Billet upgraded roller sprag &

Billet dual disk converter with sonnax upgraded efficiency stator

$5,350 installed (PRICE DOES NOT INCLUDE FLUID OR TAX)
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**Stage 3 650hp build (2 year warranty)

Mods include all of stage 2 plus -

Billet d&j channel plate

Heavy duty sfi flexplate

Deep transmission pan

$6,750 installed (PRICE DOES NOT INCLUDE FLUID OR TAX)

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**Stage 3 HD TOW 650hp build** (2 Year warranty) Recommended for heavy towing and hot shot trucks!!

Mods include all of stage 3 plus -

Sonnax billet Od hub/shaft

$7,300 installed (PRICE DOES NOT INCLUDE FLUID OR TAX)

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**Stage 4 700hp build (5 year warranty)**

Mods Include the stage 3 mods plus -

Billet 4c snapring retainer

Billet pump half

Revmax coated pump plate

$7,750 installed (PRICE DOES NOT INCLUDE FLUID OR TAX)

** Stage 4 SUPER TOW 700 build (5 year warranty)** Highly recommended for heavy towing and hot shot trucks!!

Mods include all of stage 4 plus

Sonnax od hub/shaft

$8,300 installed (PRICE DOES NOT INCLUDE FLUID OR TAX)

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**Stage 5 750hp build (2 year warranty)

Build includes stage 4 with added in
Triple disk converter

Sonnax oversized drum/piston apply kit

4th clutch upgrade to 4 clutches and custom machined reaction plate

Sonnax Overdrive Shaft

BorgWarner Sprag

$9,695 installed (PRICE DOES NOT INCLUDE FLUID OR TAX)

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**Stage 6 900hp build (2 year warranty)**

Includes all above stages along with

Custom added clutch mass into ods along with thicker reaction plate

Revmax Billet OD hub/shaft

Revmax billet Center support with our proven 2c and 4c performance clutch setup

$11,895 installed (PRICE DOES NOT INCLUDE FLUID OR TAX)

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**Stage 7 1000hp+ build (2 year clutch warranty with heavy discounted refresh rates after that)**

Above mods plus

Even more od clutch mass with 1 of a kind od drum, no other builder in the country has the od mass and apply area our custom built drums have period!
Lots of time into custom machining parts into just the input drum of the stage 7

Revmax steel inner input hub

Taller Revmax od hub shaft to work with the taller clutch pack

Custom machined 5 clutch 2c setup

Custom machined reverse hub and reverse clutch pack

Custom Valvebody mods

Tcs Billet Input Hub

Maraging intermediate shaft

Custom LR clutch pack
Will also need our custom trans tuning

$14,100 installed (PRICE DOES NOT INCLUDE FLUID OR TAX)

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AVAILABLE ADDON OPTIONS

(Some builds already have)

*Heavy duty flexplate $220*

*Deep pan $290*

*Revmax thermostat bypass for 13+ $130*

*Suncoast no cavitation filter kit $160*

*Low stall converter $150*

*Billet VB channel plate/accumulators addon $540*

*Revmax Billet OD hub/shaft $940*

*Sonnax heavy duty OD hub/shaft $490* (Sonnax or a revmax hub ARE Required for lots of heavy towing! With rough roads and heavy loads the constant bounce going through the stock shaft can eventually destroy it along with a regular billet input shaft.. We like to build it once and be done!)

*Sonnax input shaft from the regular billet $190* (Also required for lots of heavy towing)

*Powder coating adds $450*

*Custom Paint $100*

GIVE US A CALL OR TEXT @ 276-920-4280

Hello everyone! I know we haven't been very active on our page for the last little bit, but that doesn't mean the work h...
09/19/2023

Hello everyone! I know we haven't been very active on our page for the last little bit, but that doesn't mean the work has stopped! We have been blessed with tons of trucks to work on. Everything from performance engine builds, to getting customer's trucks back up and running again!

Pictures are from a few trucks we have had the pleasure of working on over the last little bit. Thanks for looking!

Address

568 Milk Plant Road
Rural Retreat, VA
24368

Opening Hours

Monday 8am - 6pm
Tuesday 8am - 6pm
Wednesday 8am - 6pm
Thursday 8am - 6pm
Friday 8am - 5pm

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