Muldoon's Performance Transmissions

Shop Transmissions & Parts

At Muldoon’s Performance Transmissions in New Castle, DE, we specialize in high-performance Dodge diesel truck transmissions and parts. Whether you need a complete transmission, rebuild kit, valve body, torque converter, or any component in between, we have you covered. Our products are built to handle the toughest jobs—from heavy towing to high-horsepower applications—with unmatched reliability and strength. Trust Muldoon’s to deliver the quality and expertise your truck demands.

Quick View

MPT Superstock 47RE – 400WHP

(0 review)
Price range: $3,945.00 through $6,120.00
Quick View

MPT Towmaxx 47RE – 500 WHP

(0 review)
Price range: $5,295.00 through $7,470.00
Quick View

MPT Stage 1 47RE – 550 WHP

(0 review)
Price range: $5,900.00 through $8,460.00
Quick View

MPT Stage 2 47RE – 750 WHP

(0 review)
Price range: $6,850.00 through $9,705.00
Quick View

MPT Stage 2 47RE 2WD – 750 WHP

(0 review)
Price range: $6,700.00 through $9,235.00
Quick View

MPT Stage 3.5 47RE – 1200 WHP

(0 review)
Price range: $9,175.00 through $12,030.00
Quick View

MPT Stage 4 47RE – 1200+ WHP

(0 review)
Price range: $9,925.00 through $12,310.00
DIY-47RH Rebuild Kit
Quick View

DIY Stage 1 47RH Build Kit

(0 review)
Price range: $4,925.00 through $7,925.00
DIY-47RH Stage 3 Rebuild Kit
Quick View

DIY Stage 3 47RH Build Kit

(0 review)
Price range: $6,725.00 through $8,245.00
DIY Stage 2 47RH Build Kit
Quick View

DIY Stage 2 47RH Build Kit

(0 review)
Price range: $5,925.00 through $7,495.00
DIY Stage 1 47RE Build Kit
Quick View

DIY Stage 1 47RE Build Kit

(0 review)
Price range: $4,750.00 through $5,270.00
DIY Stage 2 47RE Build Kit
Quick View

DIY Stage 2 47RE Build Kit

(0 review)
Price range: $5,500.00 through $7,020.00
Quick View

DIY Stage 3 47RE Build Kit

(0 review)
Price range: $6,250.00 through $7,770.00
Quick View

Billet Input Shaft Options

(0 review)
Price range: $649.00 through $1,495.00
Billet Output Shaft OptionsBillet Output Shaft Options
Quick View

Billet Output Shaft Options

(0 review)
Price range: $730.00 through $744.00
47-48 Flexplate
Quick View
Torque Converter
Quick View

Torque Converter Options

(0 review)
Price range: $1,995.00 through $2,295.00
MPT Full Manual Valve Body 47RH/47REMPT Full Manual Valve Body 47RH/47RE
Quick View

MPT Full Manual Valve Body 47RE

(0 review)
Price range: $950.00 through $1,395.00
Servo Upgrades & Transmission Case Accessories
Quick View

Servo Upgrades & Transmission Case Accessories 47RE

(0 review)
Price range: $20.00 through $300.00
Rebuild Components
Quick View

48RE Rebuild Kit

(0 review)
Price range: $495.00 through $615.00
Sonnax Servo Cover
Quick View
FMVB Install Kit
Quick View

FMVB Install Kit

(0 review)
Price range: $40.00 through $85.00
47/48 Service Kit
Quick View
Seal Kit
Quick View

Seal Kit

(0 review)
Price range: $95.00 through $115.00
Replacement Bands
Quick View

Replacement Bands

(0 review)
Price range: $25.00 through $125.00
BearingBearing
Quick View

Replacement Bearings 48RE

(0 review)
Price range: $45.00 through $60.00
Replacement SpragsReplacement Sprags
Quick View

48RE Replacement Sprags

(0 review)
Price range: $30.00 through $35.00
Stage 1 - 4 Transmissions
Quick View

MPT Superstock 48RE – 400WHP

(0 review)
Price range: $3,945.00 through $5,945.00
SS Towmaxx Square
Quick View

MPT Towmaxx 48RE – 500 WHP

(0 review)
Price range: $5,295.00 through $7,295.00
Stage 1 - 4 Transmissions
Quick View

MPT Stage 1 48RE – 550 WHP

(0 review)
Price range: $5,750.00 through $8,285.00
Stage 1 - 4 Transmissions
Quick View

MPT Stage 2 48RE – 750 WHP

(0 review)
Price range: $6,700.00 through $9,235.00
Stage 1 - 4 Transmissions
Quick View

MPT Stage 2 48RE 2WD – 750 WHP

(0 review)
Price range: $6,700.00 through $9,235.00
Stage 1 - 4 Transmissions
Quick View

MPT Stage 3 48RE – 1000 WHP

(0 review)
Price range: $7,850.00 through $10,385.00
Stage 1 - 4 Transmissions
Quick View

MPT Stage 3.5 48RE – 1200 WHP

(0 review)
Price range: $9,025.00 through $11,560.00
Stage 1 - 4 Transmissions
Quick View

MPT Stage 4 48RE – 1200+ WHP

(0 review)
Price range: $9,775.00 through $12,310.00
DIY Stage 1 48RE Build Kit
Quick View

DIY Stage 1 48RE Build Kit

(0 review)
Price range: $4,750.00 through $6,270.00
DIY Stage 2 48RE Build Kit
Quick View

DIY Stage 2 48RE Build Kit

(0 review)
Price range: $5,500.00 through $7,020.00
DIY Stage 3 48RE Build Kit
Quick View

DIY Stage 3 48RE Build Kit

(0 review)
Price range: $6,250.00 through $7,770.00
48RE Manual Valve Body Install kit
Quick View

48RE Manual Valve Body Install Kit

(0 review)
Price range: $1,800.00 through $2,285.00
Quick View

MPT 48RE Full Manual Valve Body

(0 review)
Price range: $950.00 through $1,395.00
MPT 48RE Automatic Valve Body
Quick View

MPT 48RE Automatic Valve Body

(0 review)
Price range: $850.00 through $1,350.00
-63%
Replacement Heat ExchangerReplacement Heat Exchanger
Quick View

Replacement Heat Exchanger

(0 review)
Original price was: $673.48.Current price is: $250.00.
68RFE SauceBoss valve body kit
Quick View

68RFE SauceBoss Valve Body Kit

(0 review)
Price range: $1,875.00 through $2,785.00
TSI 68RFE Input ShaftTSI 68RFE Input Shaft
Quick View
68RFE Flexplate
Quick View

68RFE Billet Flex Plate

(0 review)
Price range: $295.00 through $325.00
68RFE Upgraded Valve Body
Quick View

68RFE Upgraded Valve Body

(0 review)
Price range: $1,450.00 through $2,250.00
68RFE Valve Body Accumulators
Quick View
DNJ Billet channel plateDNJ Billet channel plate
Quick View
Quick View

68RFE Service Kit

(0 review)
Price range: $115.00 through $135.00
68RFE Upgraded Low Sprag68RFE Upgraded Low Sprag
Quick View
68RFE Thermostatic Bypass68RFE Thermostatic Bypass
Quick View

68RFE Thermostatic Bypass

(0 review)
Price range: $82.50 through $109.00
68RFE Transmission
Quick View
68RFE Transmission
Quick View
68RFE Transmission
Quick View
68RFE Transmission
Quick View
68RFE Transmission
Quick View
68RFE Transmission
Quick View
68RFE Transmission
Quick View
Switched Shifter
Quick View

Switched Shifter

(0 review)
Price range: $610.00 through $650.00

Testimonials

instagram videos

We tried this once… and immediately changed our process. 👀

Save this one for your next build. 

#muldoonsperformancetransmissions #diesel #cummins #transmission #techtiptuesday
Tech Tip Tuesday 🚨

Your future self will thank you for knowing this park rod hack. Save it before your next build ⚙️🔧

#muldoonsperformancetransmissions
#diesel #transmission #valvebody
#techtiptuesday
The shelves are filling up fast 👀

We’re building transmissions, stocking valve bodies, and staying ready. 🇺🇸

#muldoonsperformancetransmissions #cummins #diesel #transmission #valvebody
Tech Tip Tuesday at Muldoon’s 🔧⚙️

Watch how we relocate the vent pump to prevent unwanted leakage!

#muldoonsperformancetransmissions #techtiptuesday #transmissionrepair #transmission #valvebody
Tech Tip Tuesday at Muldoon’s 🔧⚙️

Proper torque converter seating is critical before installation. Fully engaged, checked, and set to avoid pump damage and shifting issues. Take the time here and save problems down the road 🛻💨
Tech Tip Tuesday at Muldoon’s Performance Transmissions 🔧⚙️

Watch how we diagnose, confirm, and repair! New solenoid pack installed and shifting is back to normal 🛻💨

#muldoonsperformancetransmissions
#TechTipTuesday #TransmissionRepair #SolenoidPack #BuiltForPerformance
If you have a lathe, a bridgeport and a mcmasterr carr account, you can do just about anything. I wasn’t fond of the three legged “spider drive” attachment that was included with the transmission dyno - it lacked precision in the concentricity and runout department. Necessity is the momma of invention - I machined a Cummins crankshaft simulator. This way I can bolt up any flexplate that is used behind a Cummins engine and have a drive that runs seamlessly. 

MPT - DRIVEN BY PRECISION 

#mcmastercarr #americanmade #machining #monarchlathe #bridgeport #automatictransmission #transmissiondyno #passion #drivenbyprecision #muldoonsperformancetransmissions #dynotested
We are running a Black Friday sale 11/15-11/30
 
  Big savings!

#blackfriday #sale #diesel #cummins #dynotested #muldoonsperformancetransmissions #dodge #47RE #48RE #68RFE #madeinamerica
Not bad for a VP44.. more modifications to come! That fourth gear tire chirp 😂. Have been absolutely loving our second gen shorty shop truck. 

#VP44 #quadzilla #secondgen #cummins #skrrrt #ram #muldoonsperformancetransmissions #diesel
All the way up! 

#muldoonsperformancetransmissions #47RE #47RH #48RE #madeinamerica #cummins #dodge #ram #topfloor @sonnaxtransmission @suncoastperformance @transgoshiftkit
Image Newsletter
select[name="pa_model-tot"] option[disabled], select[name="pa_model-tot"] option[hidden] { display:none !important; }
Select the fields to be shown. Others will be hidden. Drag and drop to rearrange the order.
  • Image
  • SKU
  • Price
  • Stock
  • Availability
  • Add to cart
  • Description
  • Content
  • Weight
  • Dimensions
  • Additional information
Compare